Browse Forums Windows & Doors Re: Cold room, is it the windows? 3Sep 28, 2020 3:32 pm LPJ If the aluminium frames are not thermally broken, then a lot of heat and cold is conducted through the frame. Are they thermally broken? At the end of the day, it is the Uw that the window achieves which decides what the energy performance is, it is not the style, not the configuration, not the colour and not whether it is thermally broken or not. The Uw is a measure of heat loss( gain) in Watts per square metre per degree Celsius, the lower the U value, the better the window performs. "ECOECO" At 'EcoEco', we design windows, we design the best windows, we do it for you, so that when you’re happy we are happy. Tel. 1800 326 326 Re: Cold room, is it the windows? 4Sep 28, 2020 6:02 pm ECOECO LPJ If the aluminium frames are not thermally broken, then a lot of heat and cold is conducted through the frame. Are they thermally broken? At the end of the day, it is the Uw that the window achieves which decides what the energy performance is, it is not the style, not the configuration, not the colour and not whether it is thermally broken or not. The Uw is a measure of heat loss( gain) in Watts per square metre per degree Celsius, the lower the U value, the better the window performs. Re: Cold room, is it the windows? 5Sep 28, 2020 6:59 pm No I don't need to check with anyone... the measure is all that matters. I never said that the frames don't contribute to heat loss, every part of a window contributes to heat loss, but a well designed non-broken aluminium window will beat an ordinary thermally broken aluminium window every time. "ECOECO" At 'EcoEco', we design windows, we design the best windows, we do it for you, so that when you’re happy we are happy. Tel. 1800 326 326 Re: Cold room, is it the windows? 6Sep 28, 2020 8:02 pm Got it. So you are saying that a well built product beats a poorly built product. OK. That’s means that a well designed and well built thermally broken window out performs a thermally unbroken window of the same quality. If there is any scientific evidence to dispute this conclusion then I would love to see it. Re: Cold room, is it the windows? 8Sep 29, 2020 1:33 pm When we developed the EcoTech window, we developed at the same time its identical twin with a thermally broken frame fully expecting this to yield a significant improvement in performance over its non-broken twin. But no, there was zero improvement. I employed Dr Peter Lyons who established WERS and is the industry expert on window performance, he advised me to widen the thermal break material (polyamide) to create a greater gap, well that had no affect. In the end I came to the conclusion that the system was optimised in aluminium as it was an it could not be improved because the heat loss was in balance be it convection, radiation (between the profiles) or conduction. LPJ drop in and see.... "ECOECO" At 'EcoEco', we design windows, we design the best windows, we do it for you, so that when you’re happy we are happy. Tel. 1800 326 326 Re: Cold room, is it the windows? 10Sep 29, 2020 3:30 pm I think that the only passive house certified windows in Australia are done by these guys... imported from Europe... likely $3,000/m2 + Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ "ECOECO" At 'EcoEco', we design windows, we design the best windows, we do it for you, so that when you’re happy we are happy. Tel. 1800 326 326 Re: Cold room, is it the windows? 11Sep 29, 2020 4:01 pm Internorm hybrid PVC/aluminium windows are certified for Australia and are also Passivhaus certified, with Uw values below 0.6 (when measured by European standards). They have distributor in Perth, PM me for the details. $1250-1600 per sqm. Re: Cold room, is it the windows? 12Sep 29, 2020 4:09 pm alexp79 Internorm hybrid PVC/aluminium windows are certified for Australia and are also Passivhaus certified, with Uw values below 0.6 (when measured by European standards). They have distributor in Perth, PM me for the details. $1250-1600 per sqm. They're not on the website "ECOECO" At 'EcoEco', we design windows, we design the best windows, we do it for you, so that when you’re happy we are happy. Tel. 1800 326 326 Re: Cold room, is it the windows? 13Sep 29, 2020 4:27 pm I also found it strange as Internorm are mentioning multiple times that most of they profiles and glass are Passivhaus Certified. But, in the end of the day, I think what is really important to the end customer is the actual performance numbers rather listing on the PHI Web site (which is not free, as far as I understand). Re: Cold room, is it the windows? 14Sep 29, 2020 4:29 pm alexp79 I also found it strange as Internorm are mentioning multiple times that most of they profiles and glass are Passivhaus Certified. But, in the end of the day, I think what is really important to the end customer is the actual performance numbers rather listing on the PHI Web site (which is not free, as far as I understand). I agree. I assume they are listed elsewhere in the world. "ECOECO" At 'EcoEco', we design windows, we design the best windows, we do it for you, so that when you’re happy we are happy. Tel. 1800 326 326 Cold room, is it the windows? 15Sep 29, 2020 7:16 pm these guys say they are PH certified https://blueskywindows.com.au Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ Depends how much direct sun it gets. Is there any shading (eaves or trees)? 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