1.   Change the furnace filter once a month.

2.   Change furnace filters regularly and use your range hood to keep dust-collecting grease from spreading.

3.   Change the furnace filter every month.

4.   Clean or replace furnace filters and have system serviced.

5.   Change the furnace filter, and call a professional to check for potentially deadly carbon monoxide leaks.

6.   Energy-conservation specialist Walt Hibner said normal furnace filters should be changed about once a month, and other filters probably should be checked about that often.

7.   Furnace filters were designed to protect the furnace blower and other components from large particles floating in the air.

8.   One way to reduce indoor pollutants is to use effective furnace filters and regularly change them.

9.   T.S. wanted to know what kind of furnace filter he should use to reduce the amount of dust in the air around his house.

10.   The most common furnace filter is the flat, one-inch-thick fiberglass filter.