O Vs B Heat Pump
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If your unit energizes the reversing valve in cooling as most do (except rheem(s)) you'll land it on o. If it's a rheem, you'll land it on b. If you have a tstat with an o/b terminal you'll need to tell it. Today's heat pump can reduce your electricity use for heating.
The o wire reverses the valve from heating to cooling, and the b wire. A heat pumps is a are versatile, efficient cooling and heating systems. Thanks to a reversing valve, a heat pump can change the flow of refrigerant and either heat or cool a home. An electric furnace will be 100 percent efficient but will be more expensive than a heat pump. An electric furnace works like a big hair dryer, producing heat with electric heating elements. Heat pump installation cost. Heat pump installation costs $3,800 to $8,200 on average, depending on the size, type, efficiency, and brand. Additional costs apply for a hybrid. Heat pumps can have problems with low airflow, leaky ducts, and incorrect refrigerant charge.