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 AC. It works by moving heat instead of generating it (the way a furnace does) which is why it can be used as a dual function system. It's true that heat pumps can be very efficient, although most air conditioners are roughly equivalent in terms of energy efficiency. Just compare 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 rating for ACs, and the higher the number, the more efficient it is. The difference between 23.5 and 26 is not astounding though, and the efficiency differs depending on the model. On the other hand, HSPF is a rating system that stands for "heating seasonal performance factor" and is specially for 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 system you choose. The largest difference between the two is that heat pumps can also heat your home while an AC can't.

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 hotter climates with less severe winters, save for some integrated systems that use heat pumps as an auxiliary, such as with a geothermal system. We recommend a consultation 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 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 hit the temperature setting on 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 to a furnace?


A furnace is a more powerful heating system and is necessary for certain colder climates. That’s because a heat pump has difficulty when the temperatures hit about 40 degrees Fahrenheit, or 4.4 degrees Celsius. As strange as it seems, during cooler temperatures, a heat pump is designed to remove 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 work properly, but in exceptionally cold climates there is not ample heat available outside to heat the air inside to high enough temperatures needed to keep warm. So while a heat pump may be ideal during the cooler temperatures for someone in Tampa, someone living in upstate New York with a heat pump would likely also need a furnace for the more extreme temperatures. If freezing temperatures hit and you don’t have a furnace to take over, a heat pump could run for hours trying to keep your home warm enough.

How to achieve maximum efficiency with your heat pump


In many 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 actual temperature to heat and cool. This is a wonderful alternative for particular northern regions, but more land must be available in order to install the essential 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 understand the pros and cons of each heating and cooling system so you don’t end up buying a system that shuts down 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 Strand Brothers Service Experts to schedule a free in-home quote. We are happy to answer any and all of your questions to help you choose the right option for your home.
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