Heat Pump vs. Air Conditioner: Which One is Right for Cooling Your Home

March 28, 2016

Although heat is in the name, you can use a heat pump for AC. It works by moving heat instead of making it (the way a furnace does) which is why it can be used as a heating and cooling system. It's true that heat pumps can be very efficient, although most air conditioners are roughly equivalent in terms of their efficiency. Just examine these two luxury level units from Lennox.

XC25 air conditioner from Lennox

XC25 Air Conditioner
up to 26 SEER
ENERGY STAR® Qualified

XP25 Heat pump from Lennox

XP25 Heat Pump
up to 23.5 SEER
up to 10.2 HSPF
ENERGY STAR® Qualified



What is SEER and HSPF?


SEER is an efficiency scale for air conditioning systems, and the higher the number, the cheaper it is to operate. The difference between 23.5 and 26 is not great however, and the efficiency varies depending on the model. On the other hand, HSPF is another scale that stands for "heating seasonal performance factor" and is specially for heat pumps. It tells you how efficient the equipment is at heating. You can tell from these examples that as far as energy effiency goes, air conditioners are mostly equal, if not superior depending on the model you choose. The largest difference between heat pumps and ACs is that heat pumps can also heat your home while an AC only cools.

Updated minimum SEER guidelines for 2018 for air conditioning units and heat pumps
Updated minimum SEER guidelines for 2018 for air conditioning units and heat pumps


Does climate matter for heat pumps?


Heat pumps are most effective in warm climates with less severe winters, save for some integrated systems that use heat pumps as backups or auxiliary, such as with a geothermal system. You should speak with a NATE certified HVAC pro who has experience in your region before deciding on a heat pump. If the equipment just isn't right for your home, you could have extremely high electric bills. Once the temperature sinks too low, it's near impossible for the heat pump to draw heat out of the air and it may never reach the temperature set by your thermostat. This means you may start running your heat pump non-stop or switching on emergency heat 24/7 during cold snaps which drives your energy consumption through the roof.

How does a heat pump compare with a furnace?


A furnace is a more robust heating system and is essential for certain cooler climates. That’s because a heat pump has difficulty when the temperature hits about 40 degrees Fahrenheit (4.4 degrees Celsius. As strange as it may seem, during cooler temperatures, a heat pump is purposed to remove heat from the outside air and use it to heat the inside air. Just because the air outside feels cold, there is still an adequate amount of heat for the heat pump to work properly, but at exceptionally low temperatures there is not ample heat available outside to increase the inside temperature high enough to stay warm. So while a heat pump may be great during the cooler temperatures for someone in Orlando, someone living in upstate New York with a heat pump may also need a furnace for the more extreme temperatures. If you’re living in those colder climates without a furnace to kick in during freezing temperatures, a heat pump may run for hours trying to make your home warm enough for comfort.

How to achieve maximum efficiency with your heat pump


In many areas, heat pumps can be used with geothermal systems, and the heating source is better for the environment because it is not burning fossil fuels and, instead, uses the Earth’s natural temperature to heat and cool. This is a fantastic alternative for certain northern climates, but extra land must be available in order to install the needed piping for a geothermal system.

We know, we know – you didn’t need another thing to think about when it comes to home comfort; but, remember, it’s important to consider the pros and cons of each heating and cooling system so you don’t end up buying a system that turns off when extreme temperatures hit, or investing in additional systems when one would suffice.

If you’re not sure which system would work best for you, call D.A. Bennett Service Experts Heating & Air Conditioning to schedule a complimentary in-home quote. We are available to answer any and all of your questions to help you make the right decision for your home.
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