09:22PM | 12/17/05
Member Since: 02/25/05
42 lifetime posts
One thing that I find frustrating about DIY boards in general is the lack of hard data when it comes to the effectiveness of a product. While it's reassuring to know that someone is happy with their results, I would prefer knowing more accurately how much difference the change made. So, for the benefit of others who might be considering new windows, I'd like to share my results.

The important tests are the last two. Remember that the old window was single pane from the 70's, and the new one is a Milgard vinyl frame double pane with Low "E" and Argon.

Temps in degrees Fahrenheit using an infrared pyrometer for surface temps:


Outside Air Temp...........31................33

(sunny side of house)

Inside Air Temp (hall).....54................58

Inside Window................39................57

Outside Window.............39................31

(shade side of house)

So, we went from a window that was the same temp on the inside as it was on the outside, to a window whose inside temp is within two degrees of an interior wall! Notice how the outside pane of the new window is actually colder than the old glass, due to it not conducting the warm air from the inside. Needless to say, I'm impressed with Milgard's quality, especially when considering that the window I bought was on the "low end" of their product line. (Vinyl, as opposed to the more expensive wood or fiberglass.)

Hopefully, someone finds this helpful!


08:35PM | 04/29/06
Member Since: 04/28/06
42 lifetime posts
Having been in the window business for 28 years, I've accumulated all sorts of statistics over the years. The following are roomside glass temperatures (center of glass) for various glass options when the outside temperature is 0°F and the inside of the home is 70°F:

14°-17° Single glazed

45° single glazed with storm

44° clear insulating glass

51°-52° Low E Insulating glass

57° Low E insulating glass with Argon gas

60° Low E/argon triple glazed

Temperatures can go even higher with krypton gas in a triple glazed.

Temperatures shown are for center of glass, edge of glass temps are about 15°-25° colder!


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