Furnaces

Furnace Safety Issues
A list of safety concerns and inspection points, put out by a Dallas, Texas heating company, but some of the points made are applicable anywhere.
http://www.tempsat.com/furnace1.html

FurnaceCompare.com
Provides information to help consumers and HVAC professionals compare the efficiency, capacity and cost of more than 17,500 oil and gas furnaces.
http://www.furnacecompare.com

The Furnace-Free House in Vermont
Discussion reported in Environmental Building News about designing a house that uses alternate forms of energy.
http://www.buildinggreen.com/elists/furnacefree.html