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 cooling. It works by shifting heat instead of generating it (furnaces burn fuel to generate heat) which is why it can be used as a two way system. It's true that heat pumps can be very efficient, but also know that most air conditioners are roughly equivalent in terms of SEER rating. Just examine these two top of the line 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 conditioners, and the higher the number, the more efficient it is. The difference between 23.5 and 26 is not astounding however, and the efficiency changes depending on the model. On the other hand, HSPF is a different standard that stands for "heating seasonal performance factor" and is specially for heat pumps. It tells you how efficient the unit is at heating. You can tell from these examples that as far as energy effiency goes, air conditioners are mostly equal, if not a little better depending on the model you choose. The biggest difference between the two is that heat pumps can also add warmth to 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 much more effective in warm climates with mild winters, save for some integrated systems that use heat pumps as an auxiliary, such as with a geothermal system. You should speak 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 sinks 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 might start 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 compare to a furnace?


A furnace is a more powerful heating system and is critical for certain cooler climates. That’s because a heat pump has trouble when the temperature hits about 40 degrees Fahrenheit, or 4.4 degrees Celsius. As strange as it sounds, during heating season, a heat pump is intended to pull heat from the air outside and use it to warm the inside air. Even when it feels cold outside, there is still plenty of available heat for the heat pump to work properly, but at exceptionally low temperatures there is not sufficient heat available outside to heat the air inside to high enough temperatures needed to keep warm. So while a heat pump may be great during the cooler temperatures for someone in Daytona Beach, someone living in upstate New York with a heat pump may 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 some areas, heat pumps can work with geothermal systems, and the heating source is better for the environment since 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 regions, but more land must be available in order to install the necessary piping for a geothermal system.

When it comes to home comfort, you probably didn’t need anything else to think about; but, remember, it’s important to consider the pros and cons of each heating and cooling system so you don’t end up purchasing a system that doesn’t work when extreme temperatures hit, or investing in additional systems when one would suffice.

If you still aren’t convinced which system is best for your home, call BW/Cook Service Experts to schedule a complimentary in-home quote. We are happy to answer any and all of your questions to make sure you choose the right option for your home.
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