Although heat is included in the name, you can use a heat pump for AC. It works by shifting heat instead of making it (furnaces burn fuel to generate heat) which is why it also is used as a dual function system. It's true that heat pumps can be very efficient, but most air conditioners are similar in terms of their efficiency. Just look at these two luxury level units from Lennox.
XC25 Air Conditioner
up to 26 SEER
ENERGY STAR® Qualified
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 guideline for air conditioners, and the higher the number, the more efficient it is. 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 a different standard that stands for "heating seasonal performance factor" and is designed to grade heat pumps. It tells you how efficient the unit is at heating. We can see from these examples that as far as energy effiency goes, air conditioners are almost equal, if not superior depending on the model you choose. The largest difference between the two is that heat pumps can also warm up your home while an AC cannot.
Does climate matter for heat pumps?
Heat pumps are more effective in warmer climates with mild 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 tech 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 much harder for the heat pump to draw heat out of the air and it may never warm your home to the temperature you set. 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 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 chillier 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 may sound, during cold weather, a heat pump is intended to remove heat from the air outside and use it to heat the inside air. Although it may be too cool outside for comfort, 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 increase the inside temperature high enough to stay 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 probably 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 certain 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 native temperature to heat and cool. This is a great alternative for particular northern regions, but additional land must be available in order to install the required 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 investing in a system that turns off when extreme temperatures hit, or investing in multiple systems when one would suffice.
If you’re not sure which system would work best for you, call Calverley Service Experts to schedule
a no-charge in-home quote. We are available to answer any and all of your questions to help you make the right choice for your home.