What Is the Most Efficient Heating System?
Heat pumps move heat instead of creating it through combustion or electric resistance, which gives them a strong efficiency advantage. Operating cost is a separate question. It depends on the heat pump's performance at the outdoor temperature, the existing system's efficiency, current energy prices, and how the controls use backup heat. A.J. LeBlanc Heating compares those inputs for the home before recommending a system.
The efficiency math, simplified
Coefficient of performance, or COP, compares useful heat output with energy input. Electric resistance heat has a COP of 1.0. A heat pump can deliver more than one unit of heat for each unit of electricity because it moves heat. Temperature-specific COP figures are examples from selected equipment, not standards for every cold-climate heat pump.
Operating cost depends on the selected equipment's published performance, the home's heat loss, current utility and fuel prices, and how backup heat is controlled. Use the homeowner's current utility bill and delivered-fuel price in our Heat Pump Cost Comparison Calculator rather than relying on a statewide price frozen into this article.
The dual-fuel configuration
Dual fuel can be a strong fit when the home already has a compatible fuel-fired system or wants another heat source for deep cold. Whether it is the lowest-cost design depends on rates, equipment, heat loss, and controls.
Installation matters as much as the technology
The numbers above assume properly sized, well-installed equipment: a correct Manual J load calculation, adequate insulation and air sealing, proper duct design for ducted systems, correct refrigerant charge at commissioning, and a thermostat configured for the equipment type. Cutting corners on installation can erase the efficiency advantage of even the best equipment.
Run the numbers for your home
Our Heat Pump Cost Comparison Calculator lets you plug in your current fuel and electric rates to see how a heat pump compares for your situation. If you are weighing a heating replacement or a heat pump upgrade, contact A.J. LeBlanc Heating or call 603-623-0412. We run the numbers for your specific home and current rates. Serving New Hampshire families since 1928.
Frequently Asked Questions
What is the most efficient heating system available?
Air-source cold-climate heat pumps are the most efficient option for NH homes, with a COP of roughly 2 to 3 at typical NH winter conditions. That is far more efficient than any combustion system, which delivers less than 1 unit of heat per unit of fuel energy.
Is natural gas cheaper than a heat pump in New Hampshire?
Natural gas is typically the lowest-cost fuel where it is available. Cold-climate heat pumps are competitive with natural gas and beat oil, propane, and electric resistance handily.
Do heat pumps still work below zero?
Yes. Modern cold-climate heat pumps deliver useful heating down to outdoor temperatures of minus 13°F and lower. Capacity declines as temperatures drop, which is why most NH installations include a backup heat source.
What is a dual-fuel heating system?
A dual-fuel system pairs a heat pump with a compatible fuel-fired backup. Whether it lowers annual operating cost depends on the equipment, home load, controls, and current energy rates.
How long do heat pumps last?
Modern heat pumps typically last 12 to 15 years with proper maintenance. The outdoor unit takes more weather abuse than a comparable AC condenser, so annual service matters more.