Furnace Fan on vs Auto: How to Choose for Comfort and Efficiency
The furnace fan setting — “On” or “Auto” — affects comfort, air quality, energy use, and equipment wear. This article explains the differences, benefits, downsides, and real-world guidance for choosing the best setting for a typical U.S. home. Use the tips to balance comfort, cost, and indoor air quality while protecting HVAC equipment. Setting When … Read more