Super-Thick Glass Makes High R-Value Windows Possible
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- Опубліковано 7 сер 2024
- When building super-insulated walls, the maximum R-value of today’s windows is the weakest link. That’s why Canadian manufacturer LiteZone developed these new insulated glass units with up to 8 layers of film and R-values up to R-17. Mike Guertin interviewed Greg Clarahan, President & CEO at LiteZone Glass Inc., last week at the International Builders’ Show about the technology that makes this possible.
Learn more about LiteZone: www.litezone.ca/
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In Scandinavia you got office buildings with R 20 glazing and even one with R 24 (Dronning Eufemias gate 8 and Wergelandsvien 7 in Oslo, e.g.)
But we use W values not R , how do we convert from R to W
@@dimmacommunication R20 is eq. to EN Ug value of 0.29 W/(m2.K) and R24 is 0.24 W/(m2.K)
@@myname686 Thank's 👍 what is the conversion table? I can guess it from this number
Nice job Mike, thanks for sharing with those of us who didn't make it to IBS. Looks like it could be an interesting product.
Where can I buy these as part of a full window assembly? Is it possible to change the white fibreglass spacer to match the colour of the window sash (eg. Bronze)?
so what is approximate cost of these glass panes?
You asked so you can’t afford it. 😂
Randomly searched thick windows. I suppose R-value has something to do with insulation properties
Cost comparison to a standard window and installation is? Or is this still in the research phase?
If you compare regular U 0.27 IGUs with LiteZone U 0.27 IGUs the cost would be comparable. But as the thickness goes up and more films are added then LiteZone IGUs will cost incrementally more - but with more insulating value. As long as you compare apples to apples regarding U-factor then I think LiteZone will be cost competitive and perhaps less. They've been on the market for 3 or 4 years.
This would be great for a glass home
is this storm rated glass?
What window companies use this technology?
So, does this make any economic sense? We could have R8000 windows if you threw enough money at them...
On the FineHomebuilding podcast Mike states that it's competitive with current triple pane prices.
Hurd windows had glass like this in the 80s/90s called Heat Mirror. The films ended up failing en masse
Several window manufacturers today use film between the glass panes to divide up the IGU into spaces. The film suspension system LiteZone uses keeps the films in tension with springs so they are kept taut during expansion and contraction.
My dad's computer in the 80s had only 8k of RAM. Luckily technology improves over time
Heat Mirror is still in use today. The failures were because of aluminum spacer bars and inadequate seals. We now use warm edge, stainless steel spacers and a polyurethane secondary seal. Robert Clarke, founder of Southwall, used Heat Mirror in the Empire State building. 11, 000 windows and ZERO failures. The films never failed. It was always the sealant or aluminum spacer bars that couldn't hold the tension.
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