GPG Outbrief 25: Lightweight Quad-Pane Windows
well hello everyone and welcome to today's webinar of an assessment of lightweight quad pane windows. before we get started i'm going to review just a few webinar logistics today's webinar is based on an evaluation by the national renewable energy laboratory and you can find the full report as well as summary documents on gsa.gov and we'll also be posting links to these documents in the zoom chat window today's webinar you'll be all in listen only mode and you can submit questions by using the q a button on the bottom of your screen and you don't need to wait until the end of our presentations to submit questions in fact we encourage you to submit questions well in advance of the q a session today's webinar is being recorded and will be shared and you can find presentation slides and recordings for all webinars on our webinar page at gsa.gov and you can also access all of our webinar recordings from past webinars on our youtube channel and we're pasting links now into the chat for both our webinar page and for the youtube channel and with that i'd like to turn it over to kevin powell the director of the center for emerging building technologies thank you andrea and it's great to see so many of you here on this webinar um so uh just a few notes about what we're going to be doing on this webinar first i'm just going to offer some some overarching uh comments that will put this technology in context then we'll hear from our researcher kasal kia riyam watana who led our evaluation who can really who will really describe what kind of performance we have seen and i think it's something that you'll find quite exciting we'll follow that with uh some on the ground feedback from tyler cooper who's our supervisory energy project manager in region 8 and led the field uh on valuation of this um technology from gsa's end and then really the most important part of this webinar is you and it's the q and a the questions that you put forwards and that will be able to uh provide some some hopefully some insightful answers too uh next slide so um i have to say that we've had 80 technologies that have been selected for evaluation and validation um through our green proving ground program and uh none are more exciting to me personally than this one uh and that's really because really the windows remain the the really the biggest obstacle um to making our buildings more energy efficient and really are the key to all of our net zero goals up till now windows really have not had anything like the performance of a wall so the most efficient building would be a building with no windows who wants to work in that kind of environment um back 30 years ago when when uh double blazing was state of the art lbnl came up another national lab with an idea of how to make a highly insulating window um they they manufactured it they proved out that you could do it uh the problem was it couldn't cost-effectively uh make to make that sort of window and so what's super exciting about this particular technology is that for the first time what we actually have is a window that has the kind of essentially has the insulating performance of a wall and yet of course is completely transparent you can look through it um and it is really not that much more expensive than a double um dominant double pane window same form factor similar kind of weight and uh we think again it'll really be a transformational technology so we're excited to share that with you next slide um this uh this uh the the research that um underlies this uh is available on our website um at gsa.gov gpg you can find the full evaluation as well as a summary document as well as a one-page infographic that can help you communicate these results to others and communicate them to yourselves i should note that this uh this particular webinar is focused on this lightweight quad pane window this is a window that is appropriate to new construction and major renovation where you're replacing um either replacing or installing windows um you know to fit in a frame there is the same company has a similar essentially the same core technology in a different form factor as a window insert that's a lightweight easy to install and easy to remove panel that can fit in front of your existing window we just released results on that and we're going to have a webinar on that technology separate webinar in march and uh with that i'm going to turn this over to casal thank you very much kevin uh good morning and good afternoon to wherever you are my name is kosovo get runwatena i'm a researcher at the national renewable energy laboratory i've been with enroll for 12 over 12 years and then before that with a consulting firm uh for another 11 years or about 25 25 years of experience um today i'm going to be presenting the um our research work and that we conducted this study over the last year and a half almost two years with the covet and again this is the highlight of this study it's a lot of detail of like the findings and then the criteria of this study a lot more so i encouraged anybody who would like to learn more in detail to check out the full report for more detail next slide please again what what's what make it the um uh attractive choice uh uh what's what's the lightweight you know quad paint windows the quad pin as the name is basically you know comprises with four panes of the insulated uh material and then in the fiberglass frame and then with the um inert gas field usually either argon or krypton uh in this case we use a krypton gas field and uh the thing that make it the magic of the lightweight is the um the inner inner pains inside uh it's gonna be either the thin glass technology um then uh or the suspended film and then with the spacer insulated spacer that's you know in between approximately performance thermal performance it's rh full frame so when we compare with the energy star windows which is only about r3 um so it's this significant improve on the energy efficient thermal performance there is installation you know because of this uh lightweight material and then uh it's the form factor the profiles basically can be fit and it's very similar to a double pane windows and when compared with the weight it's basically 50 percent uh lighter than the standard triple pin next slide please so what make it so appealing you know the um lightweight high efficient and versatile applications you know of this technology uh because of the uh for example with the thin thin glass you know the thin glass has the price has dropped significantly uh you know this thin glass technology has been used with the smartphones and the flat screens tv and it's very popular make it the price come down significantly year by year uh the uh krypton uh krypton gas you know like i mentioned that's a lot of like insulate it's rating uh windows they often fill with the uh in the gas you know either argon or krypton krypton used to be very expensive but with the um the price you know come down significantly um and krypton is the um also one of the best choice uh for the gas field you know with the six times denser than argon you know approximately 12 times denser than air so the um in term of like insulating property it's uh significant um the thin glass technologies you know can be used without frame uh you know with frame or without frame so it can be um used as as the curtain wall applications and also the units with the thin glass can be made for blast resistance as well next slide please um so this is like kind of a high level we kind of show you a real quick the comparisons of this uh thermal performance you guys pretty familiar with these the terms you know you factor all the r values that you factor basically the lower is the better in terms of thermal performance like you know invertedly same thing with the r values that the higher number is the the better um it's rating property so when you're looking at this uh with the high performance double pin uh the r value approximately 3.1 the high performance double pane i want to mention though that this is a minimum minimally uh requirements for the new gsa for new construction so this is the minimum requirements so approximately 1.1 3.1 and this
is energy star so compared to like you know triple pane 6.7 and then the quad pin uh at 8.3 um from the manufacturers uh as they mentioned that's the the incremental cost between the triple pane and the quad pane is approximately five to seven percent so make it um a big significant benefits in term of like you know improve a performance at the small incremental cost so next slide please so when we compare compare comparing like you know these two technology the thin glass expanded films they're both providing superior performance uh but just wanna showing you that uh with the cost trend um the with the thin glass is slightly cheaper but however it's slightly uh heavier anyway when we talk about heavy again this is lightweight super super lightweight for both technology and another factor about it is the condensation resistance condensation i'm going to go in more detail you know in general these both windows providing a superior uh condensation resistant that could happen uh in the climate zone co climate zone and both uh can the solar heat gain uh coefficient both can be customized and one thing about these suspended film units can can be made and meet the tempered glass requirements next slide please so um with our research for the demonstration and technology validation we conducted at a denver federal center building 41 in denver colorado so people who might familiar with this building is basically it's it's a large office building and we uh conduct it in uh one of a wing in the west side so next slide please so um we have installed um total of 10 uh windows you know five from the thin glass the unit and five for the suspended films we install monitoring equipment sensors to measure glass frames surface temperatures space conditions outdoor conditions and we use uh information of the window from the manufacturer build the doe the model in the doe windows and term software that's uh this is the two key software that's uh widely used in the in the industry and also in the researcher and even the nfrc also use these two when they calculate and estimate the thermal performance and then we use the uh the results that we will calibrate with the measured data that we have once like we calculate these thermal performance indices we use these uh performance numbers and then modeled the whole building energies simulations and for calculated hvac capacity reductions energy savings and the economics of the projects so on the right hand side there's a lot of like you know pretty busy but i wanna you know showing that a lot of data and we have to uh doing the monitoring the whole the long period of time but you know with the um num uh only a certain um data that will be used as like you know uh to meet the criteria when they calculate these thermal performance just wanna show you so next slide please um so this is like a high level like you know modeling results um so um the key uh simulated results you know the u-factor the solar heat gain coefficient visible light transmitting uh condensation resistance uh hopefully hopefully like you know some of you pretty familiar with this term but let me know if you wanna uh me to kind of go over uh during q a uh for this uh information as you can see that's you know these both windows providing a great um low you factor or you value and then as well as like you know all these numbers match pretty well very well i don't want to say pretty well it's very well uh between the uh modeling results and also the with the measured data on the right hand side this is showing the thermal modeling showing the two-dimensional heat transfer you know temperature profiles that's happening within the windows and then a pretty small number showing that you know a small font showing the number of the predicting temperatures you know in this at the surface temperatures with inside and outside uh very precisely so we feel very confident on the results of this model next slide please so um this is another another study that we do you know thermal comfort is it's a big thing when we're talking about um you know besides like energy savings right so because it's thermal comforts mean a lot of like many things on the saving productivities etc um so you can see from the right hand side this is the plot this is a measured data that we have with the uh the actual data during very very cold uh days uh in the winter um you know with the outdoor temperatures at the approximately 22 degrees fahrenheit you can see with the set point in size approximately 69 to 70 degrees and the center of glass the temperature is showing it's holding the temperatures really well you know between 65 to 60 66 degrees you know when we compare to like uh a lot of the time even you have your office or like you know at your house you touch on your window surface you can feel the cold cold whole surface of those windows so this window is like holding the temperatures really really well what does mean on like you know warmest window surface you know technically it's reducing a lot of like convective and radiative heat transfer effect when we talk about this this term you know when that's mean like when you're sitting into like next to the window you feel draft you know drafty window that's what they're talking about right so with the warmer surface you reduce a lot of draft drafty feeling uh sit next to it and uh with the results like you know we conducted like thermal analysis like follow the ashrae 52 a lot of detail in the full report so i encourage uh people who are interested and uh to look into more uh to look into the full report and the majority of the conditions that were within the comfort batteries uh during our study so next slide please so this is an additional uh benefits of this type of technologies you know besides like the entity savings that you would get um also with the new construction you know with a better uh building envelope you know that means you're reducing your uh thermal loads you know both on heating and cooling so this is another additional for the new construction when you sizing your hvac means you can downsize your hvac capacity and also with the major renovation if your major renovation happening on the hvac and then the building envelope at the same time you can take out the benefits of like downsizing your hvac as well so from our study uh it's showing that um the uh hvac capacity uh reductions you know uh we we got approximately 8 for the heating and up to 18 for the cooling and with the estimated savings of the projects is uh hundred and approximately thousand dollars of savings or about six thousand dollars you know analyze over 20 years so next slide please so condensation again condensations uh this is a rating that's you know in the if you're looking at the an frc level you see this uh type of rating uh it it's not necessarily required but it's a such good information when you're selecting the windows particularly with in the cold climate you know in the industry it's recommended that the condensation uh resistant rating um you know ranging from zero to 100 you know the higher is better they recommended a minimum of 50 for the core climates and from our studies it's showing that this window have the condensation resistance rating at between 65 and 67 one interesting thing about is like we are even expecting a higher number particularly with the thin class unit with the time constraint after during the study uh somehow the unit was built with uh still a spacer and instead of like you know a warm edge especially that will improve uh overall performance and as well as the compensation resistance and uh the manufacturer estimate that uh it could get up to a cr of 80 in in the in that study next slide please so when we talk about the energy savings you know we conducted these uh simulations uh studies uh and using the uh doe uh commercial reference building flash office you know all the building envelope and then all the um anything that climate sensitive was you know get into this model uh that we take into account and then we uh run the analysis for these ten climate zones um you know from the uh hot climate hot and humid climate to like a pretty cold climate and the results showing uh significantly improvements significantly higher savings than you know um uh a typical uh double pin so you know high efficient double pin windows uh we also modeled this uh with the gsa utility rates three different uh three gsa utility rates you know at the low mid level and then the high level and this results showing for the mid level but again all the results is more detailed can find it and can be found in the report um you can you can see we're looking at the heating savings cooling savings fan saving combines we call it you know hvac uh energy savings um uh absolutely like you know for the heating saving we see more um energy savings you know for the cold climates uh versa with the cold uh cooling that we see more uh in the warmer climate overall um we we're seeing the total um percentage of energy savings uh uh average about 24 24 and the payback uh within two years and again this is like comparing with the uh high efficient double pane windows and reusing the incremental cost for this analysis this number meant to be like providing your results i know that a lot of us like sometimes we use this as like you know a rule of thumb so um this is like you know meant to be showing uh for your screening you know it's it's very good still very very useful for your screening but when we're looking at the actual performance energy savings i encourage like you know the energy uh modeling for particular buildings that you are working on is necessary that's why like you know it's because it's so unique to the building but this is meant to be like you know a screening and you can see that it's such a attractive uh choice uh choices uh for the um energy efficiency improvements uh next slide please so in summary again this is like the number it's for our climate zone for our um utility rates you know you can it's ranging the savings uh we see is between 19 to 34 percent you know compared to the high performance double pane windows and uh the side benefits can reduce your hvac capacity requirements for the buildings you know downsizing the units and then um you know with the benefits of the slim uh profiles you know it's the same very similar similar thickness uh you know comparable weight to the double pin windows and uh you know with this uh superior um thermal performance it's improved the occupants uh comfort uh uh significantly and then like um with um a slightly incremental cause you know in between we talk about like 2.50 cents to 4.50 cents when compared with the double pin windows and the payback it's uh it's really really good the uh one to six years and making this the technology that's one of the appealing options uh for your projects for your improvements the projects next slide please okay okay um uh and then i'm gonna pass the the presentation to tyler cooper uh from the gsa thank you thanks gazal and with that we'll go next slide hopefully so um yeah one of the key highlights from this um one to highlight is the fact that the uh these quad pane windows are an identical uh pretty much identical installation and replacement compared to a typical double pane window so going through the installation process you'd go through the same same measurements same removal of the existing windows as well as the same installation of the new windows with that said they are the same weight and then you look at the standard triple pane window um 50 lighter than that with the window that is made of standard glass you look at potential use cases for these we're pretty much going to see it across the board it's got fixed insulations ribbon strip large punched openings as well as window wall installations the primary application that we would see these for would be obviously new construction retrofit but within that we'd still apply them they've got use cases for residential scenarios commercial buildings as well as industrial and high performance buildings too next slide so these windows were originally stalled in building 41 in the fall of 2019 so we had about roughly four months of actual occupant feedback prior to covid hitting and all of our workers going home working from home at that point so that kind of impacted the study results a little bit from the oxford feedback side with that said we did get some good results from the winter months and four out of five occupants recommended the window retrofit going to these spot paid windows the previous windows we had installed and building 41 were a mix of electrochromic and thermochromic windows in this area so so within that um through the nature of these we've got a steady performance year round with those um much more visually appealing compared to a thermochromic or an electrochromic window that is modulating maintain those characteristics um within that one of the big things that we've seen regardless of installation is that if you've got direct sun clearing down on windows you are still going to have some ultimate discomfort if there aren't lines in place but we'll still maintain that thermal performance of the windows next slide the best practices as casal mentioned one of the things we're trying to optimize for this is working through optimizing our building envelope within that upgrading these you're pretty much bringing windows equivalent to the performance of the overall building envelope which does allow us to go through and lower the um lower the capacity needed on our hvac equipment for the buildings which is the net first one of the first steps in going towards our net zero energy goals within that the window configuration these are highly customizable windows based on the needs of your building in the climate zone you're in we can optimize as mentioned optimized for that solar heat gain coefficient if you are in a heating dominated climate you're going to want a window with a higher solar heat gain coefficient compared to a cooling dominated climate where you want one with a lower solar heating coefficient block the heat gain more effectively and keep that cooling in your building along with that we can also modify the visible light transmittance based on needs of the occupants um as well as number other characteristics but within that the overall goal is making sure we're getting the windows specified to get the highest performance in the building next slide so within that the overall deployment recommendation for these windows is new construction and end of life replacement they're still there they are a capital project in that sense as most window projects are within that though they are supporting our net zero carbon emissions goals we're not going to get to net zero emissions in our buildings without first improving the envelope and making sure that we have the building performing at the highest level uh with the current pricing the thin glass configuration is more cost effective saul mentioned that's about 250 to 2.50 more per square foot compared to the conventional double pane high efficiency double pin windows the inverse of that is the suspended film version which does offer more selection than the actual films you use the low e coatings and provides better uv protection when that's when that's needed as we mentioned previously the film version is also lighter about a pound per square foot lighter compared to thin glass then within that mentioned these are end of life replacements if we do have lower performing windows be it double pane windows or single pane windows which hopefully we're eliminating most of those out of our portfolio at this point there's another couple options that we've considered first being secondary window inserts we've had great success with those and we'll actually be talking about those at a future webinar in march those have a lower upfront initial cost it makes those good based on if you aren't looking to replace the windows for another 10 to 20 years or so kind of that intermediate stop gap solution as well as going to and applying the lowy film on the existing windows both secondary options that you can consider rather than going to a full window replacement and with that next slide and i think we'll take it back to andrea to start a question and answer great uh thank you tyler um we do have a lot of questions thanks uh thanks for all those um i'm sure we're not gonna get to all of them we'll get to as many as we can and we will be sending out an email afterwards with the top questions and and any answers that we can't answer um right now we'll get back to you so um first first question um how does the long-term durability compare to standard igus i think either casal or tyler you can probably answer that yeah this this window we expect to be a similar in term of uh durability and then longevity of the units you know the windows in general estimate uh to last at least 20 years so we can expect like you know the at least like 20 years um you know in use so okay great tyler you have anything i'm sorry no thanks no i concur with that because okay um so how does view distortion on a quad pane window compare to that in a dual ping window that's that's an interesting question uh thank you um the however like you know when we're looking at uh visually we didn't see anything but again like you know the um with uh even though with uh suspended theme that people might think that wow how can you like you know making the films like the company making the magic you know we look we didn't see any distortions um that might happening at the extreme angle i i would expect maybe a little but as in term of like you know we didn't notice any any distortion great thank you from a visual inspection of that you have to physically be within probably a foot of the window to even see the film or the suspended glass there so you that's um if you're looking at it from a distance they look identical to the standard double pin window installation that's really good yep thank you um can this technology be incorporated with bullet resistant glass that's you know when we talk about blast resistance um it's definitely can be from we talked about um that means like you know i'm i'm pretty sure but we'll talk about super thick windows laminated you know whatever laminated they will put for that beat the bullet um that's that's information uh maybe have to work directly or consult it directly with the manufacturer as far as like you know with this uh a typical uh application that we are having i would say that it might provide some blast resistant but in term of bullet resistant i'm not i'm not sure yet but we can you know hopefully find more information okay um that's right it's i guess you're right that's blast resistance and then bullet resistance we know that they're they we can work on them with blast resistance and i think we'll probably get back to you on the on the bullet resistance um is there any concern about krypton leakage um can you comment on the window construction or design to assure tightness and long-term integrity yep uh i uh for this krypton or argon you know in in general like um a lot of people that this is maybe a a bad play press in the in the old days that people think oh it's gonna leak and then what's happening and then like it it's gonna leak i mean like you know it's it's gonna leak eventually but when we talk about it in the study independent study looking at the leakage is pretty minimal we can estimate like approximately one percent per year that means like you know the window lasts about 20 years a minimum um you probably in the 20 years you're still holding at least 80 approximately 80 and then the manufacturers say like at least 80 you know about 80 you still get a a lot of benefit of this inner gas in between so um we look into it i don't think it's not a big factor you know with this and then the um you know you know with the warranty and with everything um you know it's we feel pretty confident that you know it's pretty minimal great um because the windows are lighter and thinner thinner um are the standard quad pane windows as heel resistant um hair resistant or not it's like basically on the in outer pane an outer pin is a standard glass so i would expect that you know a similar hair resistant um that you would expect with a standard double pin you know definitely a graph size you know a golf ball size probably not but i think in in a certain level great um could this could this technology be used to replace glass and existing casements like okay uh when we talk about the existing placement here's one thing when we uh because of this window uh comes comes with uh a very good frames fiberglass frame that makes it like you know the frames uh heat loss is significant in general for the windows when we talk about the center of glass of these windows center of glass performance we're looking at over r10 business but once like you know combined with everything it's coming down to about r8 and means that you know the framing uh the edge heat loss is significant so a better frame is better so i would um in terms of like you know can be fit into like existing of course because this can can work even from the frameless you know uh uh configuration but i would recommend if you would like to get the full performance you know better performance maybe framing changing the whole testament is a better idea great um well a couple people commented on that the research was kind of limited it didn't have research in the northeast and other regions i know because there's other research in the report um other cities are modeled so there's there's more we have more research is that correct yeah that's correct and the thing is like you know we we want to be also very consistent you know with what's uh a gsa in term of the uh building um stock you know a lot of like the gsa building stock uh within this climate zone however we have some uh expanding some resource like you know to cover our climate zone as well but the result will represent things specifically for gsa great thank you cassahl um are these windows commercially available in large sizes like curtain walls i think you mentioned that or only are they only for smaller residential windows this is like first of all this is we the study we conducted is for commercial application so number one is like this is a large uh commercial size and i my understanding the windows can making as a curtain wall so yeah the sizes can be you know very very very large windows great um there's a comment that recently krypton prices have increased dramatically um and so that i know that the i'll answer this one because we've been talking to the manufacturer about this that they're looking on certifying gas blends of argon and krypton together that should have similar performance um i was i was going to add i'm not so sure it's about cool or something i don't know maybe with the label shortest inflation you never know but okay um there are a couple of costs about a couple of questions about the costs and about that 35 37 a square foot whether it's a complete window or just the thin glass layers uh this is a complete windows uh however like you know not including in i saw another question about install cost so because of this study we're doing as more like incremental cost so with the same uh profiles a similar window so we assume that the cost of the installation between the double pin and the power pin are the same that's the watch so this is like you know just material cost for window great um couple questions about whether the windows are commercially available on now and the manufacturer okay so um i'm going to speak to like you know on behalf of my manufacturer and uh i know that they are pushing their they both a lot of manufacturers you know now you can see a lot of triple coming out to the market and then uh the quad hasn't been um you know uh in the commercial match or you haven't seen much but actually it's it's commercially available as far as i know and again this is for uh commercial application and the residential a lot a lot of the time you start seeing a lot more on the triple uh but i'm sure that the company can make this unit for um arrest high-end residential i don't know you know i don't know the in terms of like you know the resident residential um sector you know it's what's the price difference or or a thing like that but i'm sure it is available yes i think that's right they are available for both commercial and residential and then the the technology that we tested in this um uh m b was provided by alpine high performance products and um so that was the particular version of the quad pane that was evaluated um i think i'll interject too yeah i think i saw another question kind of going as far as the scoping specification for the windows and i think from our perspective essentially go through a prescriptive requirement identify the performance performance characteristics you're looking for the windows flood paint windows performance that you're looking to achieve with those and put that in your specs for the project and that would be the recommended route at this point in terms of getting to a high performance window installed in part of the project great thanks tyler can you tell us about any glare control that is included in the windows okay again i know i don't want to give out like you know the research we are doing uh there's a company that's a manufacturer that's you know trying to integrating like we talked about like the glare or like you know solar control those type of um you you should estimate that you know the glare control like with other hyper phone similar to other high performance windows and but we'll talk about like in terms of like in the uh glare control shading control those kind of things automate um there's a research like you know uh it's happening right now it's kind of that's all i can say about it yeah okay great um so i think we answered uh some of the other um cost questions um can they be used in regions subject to earthquakes tornado or severe storms is there any reason that this would be different than another type of window yeah this when we talk about the technology people might scare about like you know the the thin glass and then the suspended film again this is like from the inner inner panes of the window outside is still using the standard glass thickness so um whatever it is applied to that region of course like you know we will meet that uh they probably need that kind of requirements but in terms of like this is like such a something like tornadoes and earthquakes this is uh this could be something that maybe have to discuss with the manufacturer uh in more detail okay great thank you um a couple of technical questions how do you measure surface temperatures when the paint is in sunlight and um i guess another question related is for what what are the surfaces for which the temperature is being measured the glass surfaces yeah um as far as i can tell that you know we not only just doing a single measurement you know with the surface temperatures and that's a good very good question this is i'm sure that you guys people who ask me also a researcher we we did a lot of the um a surface temperature i think a total sensors per windows is at least like 20 sensors you know that we put into the a single windows and um with um you know center of glass near the edge you know all kind of uh and it's a special sensor that wait we can answer you in the detail that what kind of sensor do we use so we'll not bore everyone but yeah there's a um yeah research level sensor great thank you um and how do you quantify the reduced convective and radiate uh radiative heat transfer effects uh was the mean radiant temperature measured so another kind of more technical yes um yes the that is the the tool from uh lawrence berkeley um that's the uh from the cb cbei uh cbe i'm sorry for that too there's a lot of like we did we conducted that uh study as well um they uh a lot of uh information a lot of uh model that we put it in there come up with the um the radiant temperatures uh of that and when compared with the results so i encourage to look at more uh detail in the full report and then should be an email for additional information you might have but we did the analysis on that okay great and are the windows made in the united states yes yes loco actually yeah yes um uh is the quad pane available in a low iron pain configuration to improve visual transmittance i'm not sure i understand that question but maybe you took us all uh yeah the i'm not 100 sure if i understand either okay uh we'll just move on and we uh we might we might be can come back to you on that one um uh okay so there are a couple of questions um a number of questions on the window inserts as well and that webinar we're not going to really touch on the those answer those questions now because we'll be hosting that uh that webinar in march and so that some of these questions we're gonna we can answer at that time um so uh i guess we've already answered the glare control has and have these windows been installed in any historic facilities i don't know if we have the answer to that okay i think one thing that people who are who all knows that historic uh uh buildings you know often like is there's some um prevention of like any change significant change of the appearance you know of this exterior in particular that's what's the um the next technology that we're going to discuss in march is a very very good application for these type of buildings okay great um big glazing projects are significantly affected by the glazing product lead times as well as price do we know whether these can be manufactured at scale with the lead times that a conventional energy code baseline window are available this information i this is more like you know manufacturing side but uh um so far that i have talked to these manufacturers they seem to be in full speed you know they um there are a lot of interest on that technologies so i i assume that um of course like you know this is not something that off the shelf so you might have to providing some lead time to in terms of like get it um you know manufacture but it's not probably gonna be like available right away off the shelf going to home depot and pick it up probably not okay um do we know whether implementation of these windows could be informed by policy as with esg or other equity considerations for historically disadvantaged communities okay i i'll answer that but probably maybe some folks at gsa maybe can help me at that as well so yeah right of course like you know the uh in term of like a policy i think it just depends um there's a lot of like a policy and then some incentive that's you know definitely encourage this type of like technologies to be deployed um but in terms of like you know uh low-income communities or like or i i'm pretty sure that there would be some some policy that encouraged like you know this type of technology usually you know that's why we talk about um energy justice and then like any equity that's you know um we are we are paying a lot of attention of this uh um aspect so i'm sure that's you know there's a policy encourage that um do we have the answer uh i don't know if we have the specs ready on what the lowest uh visible light transmittance coefficient is for this product if not if we don't have that at hand and it's something that we get back to you on yeah i don't have it at hand and then maybe this is something that uh worked directly with the manufacturer is maybe a better idea they have like a spec spec sheet and then maybe um definitely customizing this uh both on solar heat gain coefficient and visible transmittance they can do but i don't have a number in my hand okay great um has gsa done a national analysis about which and how many buildings would be a good fit for either the quad pane windows or for window inserts and do we have a plan yet uh for for these rolling out this product so similar products nationwide and kevin this plebia and tyler there's plenty of questions for you um i'll take the first rocket down and say that we have done some preliminary analysis but we haven't um we have no plan and of course there's a lot of pending legislation relative to funding that would obviously have a great deal of impact and what that would look like yes thank you okay just want to add just real quick that you know when we talk about the windows that's um the opportunity is where the building types it has windows right so uh i'm pretty that's what like we are focusing on like mostly on the office building that's where like you know the uh high wind higher window wall ratio that will providing more impact and that's also like you know the major improvement that any designer can get booked into the building envelope as well so great thanks gasal um were there any studies done on sound transmission reduction with these windows um that's a good question um again like this is not part of our research study but um in general um people when we at home when you have like you know the a single pain versus double pain nowadays you're seeing like the significant cell reduction so i'm very positive that will be a significant uh improve on the cell reductions of this technology with you know four panes of windows compared to like you know a single or double panes thank you um do we know has there been other research other extramural research being done at this time is there any secondary research on these uh for these this topic in these windows yeah i'm i'm proud to saying that our lab this is like the first quad pin uh windows a lot of study on the triple pane window right now uh you know uh they call it thin triple you know what the glass technologies on the triple but this is like kind of as fast as i know that's already published this is the first one of the quad pane great um i think i don't think we can answer this question i'll go ahead and ask it do we know whether there's an application in motor vehicles or airplanes um again it's not what we do um so we'll probably that's not really a question that we can uh we can answer um so let's see um trying to pick out some other questions that were there there was a question about the cost data and i we and we do have seen we know costs across the board have increased in the last year so um is this cost data from 2022 or from earlier this cost is like i would say that uh is around pre-coded pre-code with time like you know two like early code time so uh definitely there will be some some increase with the uh labor cost i would expect because of like inflation hit every everything or every industry so but again but this is like the cost like you know uh um about three quarterback or early call the time great um what are the associated warranties for this window technology and how does it compare to if we know how it compares to a conventional double pane igu yeah the company has like the same um 10 years warranty you know i think this is like a minimum 10 years warranty but they they always say like you know a lifetime warranty you know this type of like you know company um sometimes they're providing extra and beyond although they might say like 10-year warranty is a standard but there was there's some other material or some other thing that lifetime warranty you know that's covered so you have to look into a detail of like you know the warranty information great um do we know if there are any energy rebates for choosing quad pane windows or for improving the building envelope tyler you might have a answer for that one yeah it's going to be utility specific so it's going to depend on the utility programs they offer and then oftentimes what we've seen with that type of technology would be a custom rebate so i think the biggest my biggest recommendation reach out to your utility rep for the building and see what they have available okay great um let's see uh i think that's we're just about at time these are a lot those are a lot of great questions um thank you and again this technology is really um geared at new construction and major renovation and um we there is another uh technology that um of the lightweight secondary windows from the same manufacturer that will that report is released and we'll be hosting that webinar in march um and so um after this webinar you will receive if you want continuing education credit that's available through the american institute of architects and that includes that health safety and wellness credit for attending this webinar so if you complete the survey that you'll be receiving later today you can request credit and then the date of that next webinar is march 3rd you should all if you will have received an invitation if you haven't uh we'll be sending that out again and so thank you all for attending thanks for all the great questions and to the presenters and hope to see you on march 3rd
2022-02-07 21:23
