DIY Multi-layer glazing U-value?

nitro-nige · 05-09-13, 09:53 PM

I got this from a local window manufacturers website.

IGU's (Integrated Glazed Units) consists of two or more panels of glass separated by an air space and some type of spacer around the edges. An example of a commonly used double glazed unit is 5-8-5 (18mm) which is 5mm glass with an 8mm air gap and 5mm glass. The spacer contains a desiccant (drying agent) which eliminates moisture vapour in the cavity. The combination of the two panels of glass and the trapped air is what makes IGU's a superior energy efficient method of glazing. The IGU can perform a thermal and noise insulating function. The narrowest air gap used is 6mm, but wider gaps (10-20mm) will improve performance. For greater performance one of the glass panels should have a low-e coating and argon gas between the panes.

05-09-13, 09:53 PM	#11
nitro-nige Lurking Renovator Join Date: Dec 2010 Location: Melbourne, Australia Posts: 12 Thanks: 0 Thanked 2 Times in 2 Posts	I got this from a local window manufacturers website. IGU's (Integrated Glazed Units) consists of two or more panels of glass separated by an air space and some type of spacer around the edges. An example of a commonly used double glazed unit is 5-8-5 (18mm) which is 5mm glass with an 8mm air gap and 5mm glass. The spacer contains a desiccant (drying agent) which eliminates moisture vapour in the cavity. The combination of the two panels of glass and the trapped air is what makes IGU's a superior energy efficient method of glazing. The IGU can perform a thermal and noise insulating function. The narrowest air gap used is 6mm, but wider gaps (10-20mm) will improve performance. For greater performance one of the glass panels should have a low-e coating and argon gas between the panes.