Bear Mountain Design Profile
This company's "thermguard" control turns on a furnace fan periodically during the day and night - even when the furnace is not otherwise running - on the theory that a home is heated more evenly when air circulates more frequently around the house.
Bear Mountain Design
P.O. Box 1832
Bozeman, MT 59771-1832
(406) 587-2478 http://www.bearmountaindesign.com