Browse Forums Windows & Doors Re: Energy Report re: Glazing section 7Feb 03, 2019 9:54 pm The Harder You Try - the Luckier You Get ! Web site http://www.anewhouse.com.au Informative, Amusing, and Opinionated Blog - Over 600 posts on all aspects of building a new house. Re: Energy Report re: Glazing section 8Feb 04, 2019 11:40 am Hi Here is an article I wrote... Thermally Broken Windows - You don't need them!!! Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ Share So you have been given the bad news by your energy rater, your home needs thermally broken windows, you have been told that this will add 50% - 100% to the cost of your windows. But is it true? Why do they say you need thermally broken windows? Generally energy raters assume that a particular level of performance in a window can only be achieved with thermally broken windows. So it is not that you must have thermally broken windows, it is that your windows must achieve a certain standard of performance. When we all enjoy lots of windows in our homes, and windows are a huge energy leak, then more and more we are needing to upgrade our windows to more energy efficient designs. Thermally broken windows perform at a level better than non-broken windows of the same design, but the window still performs only as well as that window design permits and the test results that back that up. (refer tohttp://www.WERS.net) So to decide whether you need thermally broken windows with their inherent costs and lack of competitive pricing, the only thing you need to know is what is the U value (Uw) required of the window, and this is on your energy report. (SHGC - Solar Heat Gain Coefficient is also a factor but is generally easily managed). Your energy report may even specify a window brand or manufacturer, but none of that matters, only the numbers are critical. If the Uw is the same, there is no difference between one window and another in energy terms. The only information you need to work this out is the Uw in your energy report. The EcoEco EcoTech window outperforms many thermally broken windows when you compare like for like... e.g. clear glass in both windows, the EcoTech window is more energy efficient - and that is all you need to know. Our opening window rates Uw 3.4 with clear glass shown as 4/12/4 in WERS. And will perform equally well to any other window with all of those different glass types. 90% of the time you won't need thermally broken windows... and if you use EcoTech, you will have a window which is able to withstand 300kph wind. Drop in, ring or email for advice and opinion... If you are not in Victoria, yes, it's a little harder, but we do supply interstate. Don't pay for what you don't need... a little thought can save you heaps. "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: Energy Report re: Glazing section 9Feb 04, 2019 1:35 pm Here is a genuine example with our prices. They are large projects... Coronet Bay 83m2 Yarraville 137m2 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: Energy Report re: Glazing section 11Feb 05, 2019 10:27 am alexp79 ECOECO, how is it going with thermally broken frames? I remember you were planning to start supplying those too. Hi Alex We have a thermal break design. It rated no better than the non-broken design. I assume there is a breakeven in aluminium conductance and polyamide resistance, and our design crosses that point. Our current design contains the warm edge spacer, but it is not reported in WERS yet. So our WERS values are overstated, by about 0.1-0.2 U, I intend to raise our standard to have argon as standard, so overall the improvement will be around 0.3-0.4U. What we are now designing is a window that will outperform even that, so where currently we have EcoTech at say clear glass Uw 3.1 (4/12/4) with low-e 2.2, the new window will be 0.4U better than that. This new window should be available in September. "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: Energy Report re: Glazing section 12Feb 11, 2019 12:31 pm bashworth One thought is can you reduce the size of some of the windows? I see plenty of houses with a window down to the floor that has a view of fence panels. Last time I built I reduced the size of several windows which was a no cost variation. You might find the following link food for thought: Window Size Unfortunately we are at the working drawing stage where we have locked in our design. Re: Energy Report re: Glazing section 14Feb 11, 2019 1:17 pm welcome "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: Energy Report re: Glazing section 15Mar 03, 2019 3:56 pm ECOECO alexp79 ECOECO, how is it going with thermally broken frames? I remember you were planning to start supplying those too. Hi Alex We have a thermal break design. It rated no better than the non-broken design. I assume there is a breakeven in aluminium conductance and polyamide resistance, and our design crosses that point. Our current design contains the warm edge spacer, but it is not reported in WERS yet. So our WERS values are overstated, by about 0.1-0.2 U, I intend to raise our standard to have argon as standard, so overall the improvement will be around 0.3-0.4U. What we are now designing is a window that will outperform even that, so where currently we have EcoTech at say clear glass Uw 3.1 (4/12/4) with low-e 2.2, the new window will be 0.4U better than that. This new window should be available in September. Do you offer UPVC windows as well? What are the pros and cons say vs the aluminium offering ? Thanks in advance. Re: Energy Report re: Glazing section 16Mar 06, 2019 12:06 pm We used to supply uPVC only, but then we had problems associated with heat expansion of sashes and opening panels and the would catch and bind. So when we introduced aluminium, we ceased supplying uPVC. My view on uPVC is that it suits mainly small windows. Although it is supposed to meet BAL 29, it actually melts at 170 Deg, C. Over time, uPVC becomes brittle, so that replacing glass is more difficult. There is a benefit in uPVC in terms of energy performance, but it not huge. I like aluminium, it is stable, strong and doesn't change with 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: Energy Report re: Glazing section 18Mar 06, 2019 12:14 pm alexp79 There are also windows with aluminium outside and uPVC inside. Yes, and aluminium outside and timber inside... these are known as composite windows. Very expensive, but if you want the look, then no option. "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 This is one of the reasons I decided to go overseas for my double glazed windows. As the builder indicated, he's worked on many upmarket builds, these were the most well… 13 19572 For your reference Performance Labels: Window assemblies in housing, except timber windows, must be labelled so the label can be seen when it is in situ. For timber… 6 10129 go upvc window frames ensure insulation under colorbond. not just sarking, lighter color roof also not sure if you have seen this viewtopic.php?t=5823 last couple of pages… 4 111326 |