phone service hours
Mon - Fri : 8am - 5pm EST
Call us now
855-634-5588
Shopping Cart item - $0.00

You have no items in your shopping cart.

Subtotal: $0.00

Heat Pump Sizing Calculator

How do I size a heat pump and the supplemental heating element for my home?

Assuming you've determined that a heat pump is right for your climate , the standard and technical explanation links below describe the only proper way to size both the heat pump itself and the supplemental heating element that is included with all of our heat pump systems.

Here is the simple explanation of how a heat pump is sized .

Here is the simple explanation of how a heat pump is sized : Back to Top

When sizing a heat pump for your home we begin by determining the required cooling capacity just as we would with any air conditioning system. Heat pumps are offered in the same tonnage increments as you expect from standard air conditioning so pick the proper tonnage based on the cooling requirements of your home. Our air conditioning sizing calculators are available here .

You can use our climate-based sizing chart to get an idea of sizing based on your climate. We suggest that you complete a load calculation on your home or that a local contractor visit you to provide a detailed analysis for proper sizing of both the heat pump and supplemental heating element.

Once you have determined the sizing requirements for the cooling side of your heat pump system, you then need to select the proper supplemental heating element that is included with all of our heat pumps. If you are replacing an existing heat pump system simply locate your main breaker panel and identify the heating breaker. Look for a number where you grasp the breaker. The following breaker sizes indicate the heating element shown:

30 amp - 5.0kw
40 amp - 7.5 Kw
50 amp - 8.0Kw
60 amp - 10.0 Kw
80 amp - 15.0Kw
110 amp - 20.0Kw

If you are not replacing an existing heat pump system you can use the heating element sizing guidelines below. The average low temperatures shown below are considered to be the average low temperature you would expect to experience just about every winter, not the coldest you would ever expect to see over a 5-year period for example. Central Florida has an average low of 35 degrees but can experience temperatures in the low 20's every 6 or 7 seven years.

Supplemental Heating Element Kw by climate and tonnage

Very warm winter climates (Average low winter temperatures of 35 degrees and up)

1.5 - 3.0 tons Heat Pump - Use a 5 Kw
3.5 - 5.0 tons Heat Pump - Use a 10Kw

Mild winter climates (Average low winter temperatures of 25 degrees and up)

1.5 - 2.0 tons Heat Pump - Use a 5 Kw
2.5 - 5.0 tons Heat Pump - Use a 10Kw

Colder winter climates (Average low winter temperatures of 0 degrees and up)

1.5 - 2.5 tons Heat Pump - Use a 10 Kw
2.5 - 3.5 tons Heat Pump - Use a 15 Kw
4.0 - 5.0 tons Heat Pump - Use a 20 Kw

Coldest winter climates (Average low winter temperatures of -10 degrees and up)

Heat pumps are not recommended for these climates unless no other choice exists.
1.5 - 2.0 tons Heat Pump - Use a 10 Kw
2.5 - 3.0 tons Heat Pump - Use a 15 Kw
3.0 - 5.0 tons Heat Pump - Use a 20 Kw

Remember, the sizing above is informational only and not is intended to replace proper sizing from either a local contractor or from our sizing calculator .

our brands