Description: The A98MV 98% AFUE high efficiency modulating furnace under the Armstrong Air and AirEase brands features modulating heat for superior comfort and qualifies for up to $600 in tax credits ...
The Family Handyman on MSN

How Does a Gas Furnace Work?

If you need to purchase a gas-burning forced-air furnace but aren't sure how they work, here's what you need to know.