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

March 28, 2016

Although heat is part of the name, you can use a heat pump for cooling. It works by shifting heat instead of making it (furnaces burn fuel to generate heat) 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 similar in terms of energy efficiency. Just compare these two luxury level systems 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 more efficient it is. The difference between 23.5 and 26 is not crazy 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 unique to heat pumps. It tells you how efficient the system is at heating. We can see from these examples when comparing efficiency ratings, air conditioners are about equal, if not superior depending on the model you choose. The greatest difference between the two is that heat pumps can also heat your home while an AC cannot.

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 more effective in warm climates with milder winters, save for some integrated systems that use heat pumps as a backup, such as with a geothermal system. You should speak with a NATE certified HVAC technician who has experience in your region before settling on a heat pump. If the equipment just isn't right for your climate, you could have unnecessarily high electric bills. Once the temperature drops too low, it's difficult for the heat pump to draw heat out of the air and it may never hit the temperature setting on your thermostat. This means you could unknowingly begin running your heat pump non-stop or switching on emergency heat 24/7 during cold snaps which drives your energy consumption way up.

How does a heat pump compare with a furnace?


A furnace is a more robust heating system and is critical for certain chillier climates. That’s because a heat pump has issues when the temperatures hit about 40 degrees Fahrenheit, or 4.4 degrees Celsius. As strange as it seems, during heating season, a heat pump is intended to pull heat from the outdoors and use it to warm the inside air. Just because the air outside feels cold, there is still plenty of available heat for the heat pump to function well, but at exceptionally low temperatures there is not enough heat available outside to increase the inside temperature high enough to stay warm. So while a heat pump may work perfectly during the heating season for someone in Daytona Beach, someone living in upstate New York with a heat pump would likely 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 function 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 wonderful alternative for particular northern regions, but additional land must be available in order to install the proper piping for a geothermal system.

Just what you needed – one more thing to think about when it comes to your home comfort; but, remember, it’s important to examine the pros and cons of each heating and cooling system so you don’t end up purchasing a system that turns off when extreme temperatures hit, or investing in two systems when one would suffice.

If you can’t decide which system would best fit your needs, call Abbey Air Service Experts to schedule a no-charge in-home quote. We are happy to answer any and all of your questions to make sure you make the right choice for your home.
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