March 9th, 2007 - Window specs
This is just a note for myself for the future. The windows we installed this winnter have the following stats:
U Factor: .32 (Ranging from .2 to 1.2, the lower the better.)
Solar heat gain coefficient: .32 (Ranging 0-1, lower numbers mean less solar heat transmitted. Good in summer; not so good in winter up here.)
Visible transmittance (PDF): .52 (Ranging 0 - 1, most values are between 0.3 and 0.8. The higher the VT, the more light is transmitted.
A high VT is desirable to maximize daylight.) (This looks like a good overall guide to energy efficient windows.)
Air leakage: unknown.