The heat pumps on mini-split air conditioners work to maximize heating capacity up to an outdoor temperature of 32 degrees Fahrenheit. When the temperature outside dips under 32 degrees, the heating capacity of the unit drops.
For example, with a unit that is rated at 12,000 BTU's, if the temperature is 32 degrees or warmer, the unit will give you the full 12,000 BTU's. However, if the temperature is 20 degrees, the unit might only give you 8,000 BTU's.
Therefore, when considering a mini-split system with a heat pump, keep in mind that it would function well as a back up heat source, but not as a primary heat source (that is, unless you live in a place where the weather is warm all year-round)!
Mini-Split Systems can be found at www.supplyhouse.com.
