This one is a quality control question. I have two windows next to each other on the second story of our new house. Both windows receive very similar solar exposure. Both windows were spec’d with pebble glass in a two pane thermal unit with low-e coating. One is a casement unit in a wooden frame, the other is in a fixed fiberglass frame; but both used the same thermal unit design. I don’t believe that the one in the casement window was treated with low-e as it, and that small room both, get real warm even during the cooler days of fall here in Colorado. (We just moved into our new home four weeks ago.)
I have talked with the manufacturer’s rep, who I purchased the windows from. He tells me that the factory’s records show that the window in question was treated with low-e. He then tried to explain that low-e is supposed to allow in the warmth from low angle sunlight. Yet the window right next to it does not get that warm like the one in question, and it also is in full sun. My question is: How do I prove whether that window’s glass was treated or not?
My only thought up to this point is to keep a record of the temperatures of both window’s glass, and others, using a non-contact thermometer. I figured that for me to say that one is much warmer then the other is subjective, but differential readings would be more factual? Does anyone else have any ideas as to how to resolve this?
Edited 11/30/2009 7:47 pm by BigK