How Cold Is Too Cold For My Heat Pump?
Heat Pumps are highly efficient units but they do come with some drawbacks when the weather gets really cold.
Will My Heat Pump Work When It’s Cold Out?
This is a somewhat 2 part answer.
The short answer would be yes, your heat pump will heat your home in cold weather.
The tricky part is exactly how cold does it have to be before your heat pump just cant keep up?
Let’s take a look.
Your heat pump heats your home by absorbing the heat in the outside air and transferring this heat indoors.
This is great when there is some heat in the air for it to transfer, but when temps drop below freezing, the efficiency of your heat pump begins to suffer.
This is why you have what is called “aux heat” or “emergency heat” when you have a heat pump.
This emergency heat comes in the form of a furnace inside your home (electric or gas) and it takes over for your heat pump when it just can’t keep up anymore.
Emergency Heat Source
When the temps outside begin to drop below freezing, your thermostat should automatically switch from your heat pump to your aux heat due to the loss of efficiency in your heat pump heating your home.
Now, this can be customized to switch at a certain level, but most are smart enough to know when to switch over themselves.
Some people that refuse to switch to aux heat will set their thermostats to run their heat pump until it just can’t heat anymore.
This can sometimes place undo stress on your heat pump and result in needing a furnace repair to get it working again.