Heating, ventilating and air conditioning systems use a significant amount of energy in the home. The U.S. Environmental Protection Agency has provided a guide to upgrading old heating and cooling equipment with energy-efficient equipment. Learn how to:

Green Home Case Study: Seattle's Studio 24
36 Ways to Save Energy and Money - Right Now!
Mainestream Green Home Design
Turning the Tides of Crisis: Prioritizing Water Conservation Before It’s Too Late
Ducts in the Attic? What Were They Thinking?
Energy Star Appliances and Beyond; a Critical Componet of Zero Energy Houses
ENERGY STAR® Qualification Criteria for Residential Doors
36 Ways to Save Energy and Money - Right Now!
Energy-Efficient Home Design Revitalizes One Community
A Do-It-Yourself Guide to Energy Star Home Sealing
Take Control of Your Heating and Cooling Costs with High-Performance R-5 Windows
Geothermal Heating and Cooling Delivers Savings and Comfort for Central Iowa Homeowners
How to Build a Home Like a Car That Gets Over 100 MPG
Product and Technology Review: Acadia Heat Pumps
Basements
Crawl Space
Indoor Air Quality (IAQ)
The ins and outs of spray foam insulation
Humiditrol Whole-Home Dehumidification System
Indoor Air Quality Assessment Checklist