With a single-stage gas control system, the 91 Tech ensures stable heat output to maintain even temperatures throughout the home. This means that your comfort never wavers, regardless of the changing weather conditions outside. It’s this kind of dependable performance that exemplifies Armstrong Air quality.
The System Sentry™ control system helps assure safe, reliable and efficient operation by constantly monitoring and controlling the furnace. Should trouble occur, the System Sentry™ control system will provide service codes to a contractor to help quickly and accurately diagnose the problem. The time-tested stainless steel heat exchanger with a limited lifetime warranty* will provide years of reliable, trouble-free service.
The unique design of the 91 Tech furnace, which can bring combustion air to the furnace from outdoors, also provides two layers of steel between where combustion occurs and your living space. The fully insulated cabinet adds to the quiet nature of the furnace, keeping heat and sounds where you want them contained, within the furnace.
The 91 Tech furnace features an AFUE rating of up to 91.0%. That means less energy is required to maintain the comfort of your home when compared to older, less efficient furnaces. In the short term, you save on utility bills. And in the long term, the energy savings can exceed what you paid for your furnace.† The 91 Tech is an ENERGY STAR® listed product. Now that’s a smart investment!
Lifetime Limited Warranty on primary & secondary heat exchanger.
5-year Limited Warranty on parts.
(Ask us for complete details regarding warranty coverage.)
Proper sizing and installation of equipment is critical to achieve optimal performance. Split system air conditioners and heat pumps must be matched with appropriate coil components to meet ENERGY STAR criteria.