Our Terms of Service and Privacy Policy have changed.

By continuing to use this site, you are agreeing to the new Privacy Policy and Terms of Service.

4 of 8
BACKNEXT
Heating, Ventilation, and Air Conditioning (HVAC)
Heating, ventilation, and air conditioning systems require proper and regular maintenance in order to work efficiently, but even in the best case scenarios most components of such systems only last 15 to 25 years.

Furnaces on average last 15-20 years, heat pumps 16 years, and air conditioning units 10-15 years.

Tankless water heaters last more than 20 years, while an electric or gas water heater has a life expectancy of about 10 years.

Thermostats usually are replaced before the end of their 35-year lifespan due to technological improvements.



NEXT: Paint, Caulks and Adhesives

Last updated October 16 2008: 4:37 PM ET
More Galleries
Exploring 10 great cities for business in Asia From Shanghai to Tokyo, Mumbai to Hong Kong, here's how to make the most of the days between the deadlines. More
10 of the best beaches near airports Wait out your layover in the transit lounge? Or grab some sun, sand and surf? More
World's Top Employers for New Grads For an exclusive CNNMoney list, research firm Universum Global surveyed business students at colleges around the world to see where they most want to work. More

Special Offer