The cost to replace a gas furnace depends on the unit’s efficiency and size in BTUs, ductwork modifications, labor, permits, and installation complexity.įind top-rated furnace replacement companies near you. Return to Top Cost factors to replace a gas furnace Adding a heat pump costs $2,500 to $6,000 more on average. Hybrid heating or dual-fuel systems that use an air-source heat pump and gas furnace are the most energy-efficient. A high-efficiency unit may be eligible for an Energy Star federal tax credit of up to $300 and other local rebates.Furnaces lose heat through air leaks, inefficient burners, exhaust, or a less-advanced design.High-efficiency furnaces have an AFUE in the 90's, while furnaces in the 80's are standard-efficiency.A furnace with an AFUE of 90 turns 90% of its fuel into usable heat. A higher AFUE percentage produces more heat on less fuel, lowering fuel costs. The Annual Fuel Utilization Efficiency (AFUE) rating measures the energy efficiency of furnaces. Condensation-drain design for reducing emissions.A secondary heat exchanger costs $1,000 to $2,000 to prevent heat loss through vents.Variable heat settings such as two-stage or multi-speed blowers to lower natural gas bills.Multiple fan speed options to save electricity costs.A high-efficiency gas furnace is worth the cost for the extra benefits of:
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