80% Gas Furnace Models: 312 and 315

The Plus 80v™
Model 315A Multi-Poise
with Perfect Heat Perfect Humidity

The technology driving this furnace includes variable speed motors, an "intelligent" electronic control and a two-stage gas valve. These components work in concert to create a masterful blend of warmth, quiet operation and economy. You'll enjoy the extra comfort while saving money with year-round electrical efficiency.

Here's how the Perfect Heat system works
At start-up, low stage heating gently circulates warm, comfortable air into your living space. The Plus 80v operates on low-stage heating up to 90% of the time to deliver consistent, quiet comfort. Because the air circulates gently, the Plus 80v virtually eliminates up-and-down temperature swings and pockets of hot and cold air associated with standard furnaces. When conditions change, the intelligent control board automatically adjusts to deliver the best possible combination of comfort and energy efficiency.

The Plus 80t™
Model 312 Multi-Poise
with Perfect Heat

The Plus 80t takes the bite out of winter's chill by offering the performance of two furnaces in one compact package, thanks to Perfect Heat technology. With Perfect Heat, heating is even and consistent from room to room.

Operation is extra quiet, allowing you to truly relax as you enjoy the comfort of your home. And, as part of a year-round home comfort system, the Plus 80t enhances cooling performance while helping save on electrical costs all year long. Designed, built and backed by the nation's most respected name in heating, the Plus 80t provides exceptional comfort from the people who do whatever it takes to earn your trust.

The Perfect Way to Enjoy Winter Weather.
Winter weather often hits you two ways: cold, and colder. That's why the Plus 80t with Perfect Heat is the perfect solution. Perfect Heat provides two stages of heating to battle changing winter conditions. At start up, low stage heating gently circulates warm, heated air into your living space. As outdoor temperatures become more extreme, high stage heating provides the extra boost you need to remain comfortable. The Plus 80t operates on low stage heating a majority of the time to deliver even, comfortable heating. These longer, gentler heating cycles help eliminate the up-and-down temperature swings associated with single-stage furnaces, which cycle on and off more frequently. Low stage heating provides the additional benefit of extra-quiet performance. It truly is like having two furnaces in one, all with 80% AFUE Annual Fuel Utilization Efficiency) gas efficiency.

Enhanced Comfort All Year Long.
As a part of your year-round comfort system, the Plus 80t can work with our optional ThermidistatTM Control to better monitor and maintain proper humidity levels. When humidity rises during cooling operation, the Plus 80t kicks into high gear to remove excess moisture. For even greater humidity control, our SmartEvap™ feature helps the Plus 80t reduce humidity by an additional 10% over a standard system.