Quiet, Efficient Comfort You Can Count On Bryant's Plus 90(model 350MAV) keeps your home warm and comfortable with up to 95.5% AFUE (Annual Fuel Utilization Efficiency). That's an improvement of almost 30% over typical older furnaces. Our primary heat exchanger transfers 80% of the available heat into your home. Although this is where most furnaces stop, Bryant's patented secondary heat exchanger transfers an additional 11-15% of the available heat into your home for money savings, energy efficiency and comfort.  1. Hot Surface Ignition Eliminates a wasteful standing pilot and saves energy. Backed by a three-year limited warranty. 2. Four-Pass™ Heat Exchanger Saves energy through superior heat transfer. Constructed of aluminized steel with crimped seams for corrosion resistance and enhanced reliability. Backed by a twenty-year limited warranty. 3. Inducer Assembly Reduces noise with a vibration-absorbing mounting assembly. The inducer enhances efficiency by drawing the exact amount of air needed through the heat exchanger. 4. Electronic Control Minimizes cold drafts with it's blower delay. Electronic air cleaner and humidifier connections allow for easy hook-up of a total indoor comfort system. Backed by a three-year limited warranty. 5. Added Safety Is provided by Bryant's exclusive blocked vent safe-guard protection. It shuts down furnace operation if a vent is obstructed. That means your family is protected from harmful flue gases that could escape into your living area. 6. Fully Insulated Blower Compartment Reduces sound levels by helping to absorb unwanted noise. Also helps capture conditioned air to reduce operating costs.