Pacific Gas & Electric (PG&E)

Home Heating Fact Sheet
The Furnace
"The first place to look for potential energy savings is the furnace itself. Just taking care of the following routine maintenance items could save 10% or more on your heating bills."

Keep it Running Correctly
Clean or Replace Furnace Filters Regularly: "Most furnace filters are disposable. Some filters are washable and can be cleaned when clogged or dirty. Checking the filters in your system once a month during times of high use will help insure proper airflow. . . “
http://www.pge.com/includes/docs/pdfs/mybusiness/energysavingsrebates/rebatesincentives/heating2.pdf

Home Cooling Fact Sheet
“. . .A poorly maintained air conditioner uses 10-30% more energy than necessary. But if you follow these simple steps, you'll be well on your way to cutting your energy bills. . .
3. Replace or clean dirty air filters. Dirty air filters are the #1 cause of air conditioning service calls. But filters are easy to replace and you can do it yourself. Put in a new one every month during the summer. . .”
http://www.pge.com/includes/docs/pdfs/mybusiness/energysavingsrebates/rebatesincentives/cooling2.pdf