A pale green two-story house with a brick chimney and a heat pump unit beside it, under a clear blue midday sky

Use less energy at home. Start with what costs nothing.

Plain guides for owners and renters: which change cuts your use most, what it costs, and when to call a pro.

Find what to cut first

Find what to cut first

Pick where to start. Free changes come first.

Do you rent or own?

I rentI ownShow all

Free

Set back a furnace or boiler Renter Owner
Heat pump: hold it steady Renter Owner
Use a ceiling fan the right way Renter Owner
Heat one room with a space heater Renter Owner

Small buy

Size a window air conditioner Renter Owner

Bigger job

Seal leaky ducts Owner

Every guide in Heating and cooling

Heating season

Guides for the months the heat is on.

A white heat pump outdoor unit sits on a wall bracket above fresh snow beside a gray brick townhouse under a blue sky.

Heat pump: hold it steady Read the guide Renter Owner Free

Heat one room with a space heater Renter Owner Free
Seal air leaks first Renter Owner Small buy
Gas appliances: stay safe while sealing Renter Owner Small buy

Renting? Changes you can undo

Changes you can make yourself and undo when you move out. Check your lease first.

Wash in cold Renter Owner Free
Price any appliance Renter Owner Free
Find the always-on devices Renter Owner Small buy
Renters: seal drafty windows Renter Small buy