Mechanical and Electrical Equipment for Buildings, Ninth Edition, Stein & Reynolds, pub. JohnWiley & Sons, Inc, 2000.
Physics For Scientists and Engineers, Fifth Edition, Serway & Beichner, pub. Brooks/ Cole, 2000.
Low e glass: http://tva.apogee.net/res/rewlowe.asp
Insulation: http://www.ornl.gov/sci/roofs+walls/insulation/ins_01.html
Gas Heaters: http://www.thomasregisterdirectory.com/heaters/gas_heaters_0040765_1.html
Local Temperatures: http://cdo.ncdc.noaa.gov/ancsum/ACS?