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 air conditioning. It works by transferring heat instead of generating it (the way a furnace does) which is why it also is 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 SEER rating. Just look at these two luxury level cooling 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 conditioners, and the bigger the number, the cheaper it is to operate. The difference between 23.5 and 26 is not great though, and the efficiency varies depending on the model. On the other hand, HSPF is a rating system that stands for "heating seasonal performance factor" and is unique to heat pumps. It tells you how efficient the system is at heating. You can tell from these examples that as far as energy effiency goes, air conditioners are almost equal, if not even better depending on the system you choose. The greatest difference between heat pumps and ACs is that heat pumps can also add warmth to 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 much more effective in warmer climates with milder winters, save for some integrated systems that use heat pumps as an auxiliary, such as with a geothermal system. We encourage you to consult with a NATE certified HVAC tech who has experience in your area before settling on a heat pump. If the equipment just isn't right for your climate, you could have very high electric bills. Once the temperature gets too low, it's difficult 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 end up running your heat pump non-stop or switching on emergency heat 24/7 during winter which drives your energy consumption up.

How does a heat pump stack up against a furnace?


A furnace is a more powerful heating system and is essential for certain chillier climates. That’s because a heat pump has issues when the temperature hits about 40 degrees Fahrenheit (4.4 degrees Celsius. As strange as it seems, during heating season, a heat pump is designed to pull heat from the air outside and use it to raise the temperature of the inside air. Just because the air outside feels cold, there is still a sufficient amount of heat for the heat pump to function well, but in exceptionally cold climates there is not ample heat available outside to warm the inside air to higher temperatures needed to stay warm. So while a heat pump may be great during the winter months 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 don’t have a furnace that kicks in when the freezing temperatures hit, the heat pump can run for hours trying to keep your home warm enough.

How to achieve maximum efficiency with your heat pump


In certain 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 areas, but additional land must be available in order to install the required 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 investing in a system that shuts down when extreme temperatures hit, or investing in additional systems when one would suffice.

If you can’t decide which system would best fit your needs, call Service Experts Heating & Air Conditioning 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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