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Cleveland HVAC Blog

Size Your Heat Pump Appropriately to Help Control Humidity

Posted by Paul Wadsworth on Fri, Jul 26, 2013 @ 03:26 PM

Heat pumps are an efficient means of climate control that have the ability to heat, cool and dehumidify your home. Sizing a heat pump correctly is the most effective way of conditioning a home.


sizing a heat pump for home comfortWhen cooling your home, a heat pump operates the same as regular air conditioners. And as with a central A/C system, sizing a heat pump correctly has a direct effect on the equipment's ability to condition effectively. If a technician uses a lax rule-of-thumb method to determine your equipment size, you could end up with an oversized unit. This leads to short cycling, increased operation cost and excessive wear and tear. Make sure your HVAC professional makes load calculations using Manual J or an accepted industry alternate.


What separates heat pumps from regular air conditioners is their ability to reverse this process to provide heating in the winter. Because they're moving heat around instead of creating it, heat pumps offer heating efficiencies that are unmatched by traditional methods.


The ability of a heat pump to remove humidity is a result of the cooling process. Cooler air can't hold as much moisture, so when air comes into contact with the cold cooling coils, a significant amount of water condenses and is drained away. To provide dehumidification without cooling, heat pumps alternate between heating and cooling modes to keep the home at a stable temperature while removing humidity during the cooling portion of the cycle.

In order to get the best dehumidification from your heat pump, it's important to ensure that it's not oversized. Heat pumps that are larger than necessary only run for a brief period of time so less condensation occurs and less humidity is removed. While you could run the heat pump in dehumidification mode to remove additional humidity without further cooling the house, this is much less efficient. The brief run times of oversized heat pumps can also create other performance issues.

Air conditioners also remove humidity through the same process, but cannot provide humidity removal without cooling the home.

If you want more information on heat pumps, contact the experts at P.K. Wadsworth Heating & Cooling. We've provided quality heating and cooling services to the greater Cleveland area since 1936.


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Paul WadsworthPaul Wadsworth is the President and Owner of P.K. Wadsworth Heating and Cooling. For 37 years, Paul has been providing heating and cooling services to the Greater Cleveland area. P.K. Wadsworth has been a trusted Cleveland HVAC service company for over 75 years. The company understand the area's construction and local heating and air conditioning needs. Paul has an MBA from the University of Michigan and a B.S., Industrial Engineering from Purdue University. Paul is the Chairman of COSE's Energy Advisory Council. He's been President of the Cleveland Air Conditioning Contractors of America and a founding member of the local chapter. Paul was born and raised in Cleveland and has been active in the local community. He resides in Cleveland, Ohio with his wife and two sons.

The opinions and statements contained in this article are for general informational purposes only and are not instructions. Only trained, licensed and experienced personnel should attempt installation/repair. The author assumes no liability for the opinions/statements made in this article. Any individual attempting a repair or installation based on this article does so at their own risk of loss.

Topics: hvac professionals, dehumidifiers, air conditioners, heat pump

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