Whole house fans
A whole-house fan, also known as an attic fan, provides great ventilation, lowers indoor temperatures and summer electric bills.
Geothermal
Capturing the heat from the earth can save you big money on your energy bills. Learn how geothermal systems work.
Geothermal 101
In this video: Find out how a geothermal system works, what it can cost and how you can install one in your home.
More from this category
Ductless mini-split system
A ductless mini-split system provides heating and air conditioning to spaces where a traditional ducted system won't work.
Radiant floor heating
Heating from the floor is comfortable and very energy efficient. See how it's installed and how it works.
Fix leaky ductwork
Leaks in your ductwork mean the air you've paid to heat or cool is not getting where it needs to go. Find out how to diagnose and fix this common problem.
Options for heating your home
Shop and compare when choosing a new heating system. Look for the yellow Energy Guide label to see how one unit stacks up against another.
Maintaining your fireplace
Proper maintenance of your fireplace is important to make sure it's working efficiently and safely.
Sealing ductwork
Leaky ductwork is one of the most common household problems. Luckily, it's easy to fix with the right materials.
Maintaining your furnace
It's important to keep this big piece of equipment in tip-top shape in order for it to operate at peak efficiency.
Space heating and furnace myths
There are lots of "tips" out there that may not be true or safe. Find out how to separate facts from fiction.