![]() ![]() High-efficiency furnaces have an AFUE in the 90's. A furnace with an AFUE of 90 turns 90% of its fuel into usable heat. A higher AFUE percentage produces more heat with less fuel, lowering fuel costs. The Annual Fuel Utilization Efficiency (AFUE) rating measures the energy efficiency of furnaces. Variable heat settings such as two-stage or multi-speed blowers to lower natural gas billsĪ secondary heat exchanger costs $1,000 to $2,000 to prevent heat loss through ventsĬondensation-drain design to reduce emissions Multiple fan speed options to save electricity costs A high-efficiency gas furnace is worth the cost for these extra benefits:
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