Browse Forums Windows & Doors Re: Why I chose double glazing 7May 03, 2010 9:06 am ed @ EcoClassic The rule doesn't meet regulations... 10% by floor area for light. Most modern homes have >20%. Your example has 6%-7% at best. This would also mean almost every piece of glass must be opening to meet ventilation regs Ed Not a rule, just a guideline. Obviously standards must be met (and other functional requirements acknowledged) but it gives direction to house designers do they will know if they begin compromising thermal efficiency. We have more south glass (DG) than recommended in the living area because it opens onto a outdoor living area. I also added a little openable west glass to assist with cross ventilation. However, these things do have negative effects. However, it there are creative ways of mitigating issues with clever design so that west windows can be shaded by the shape of the building. Long narrow north facing blocks can benefit from a courtyard design to admit more light to the rooms to the rear. Finally, if there are no design solution then components like awnings, pergolas, shading structures, IGU and low-e windows will help. 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 19076 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 7673 6 11470 |