For some people, another consideration is that you could use both. Thermostats frequently have a way to connect multiple heat sources, and there’s presumably one fancy enough that you could decide between them based on the outdoor air temperature. I plan to do this whenever the one-way heat pump (“air conditioner”) that came with my house breaks.
For that to be worth, you would need several things to be true though:
You want a heat pump for other reasons (air conditioning)
There are some days when the heat pump is better than the boiler despite electricity costs
The upfront cost of the slightly more expensive heat pump is made up for by the lower energy cost on the days you use it
For some people, another consideration is that you could use both. Thermostats frequently have a way to connect multiple heat sources, and there’s presumably one fancy enough that you could decide between them based on the outdoor air temperature. I plan to do this whenever the one-way heat pump (“air conditioner”) that came with my house breaks.
For that to be worth, you would need several things to be true though:
You want a heat pump for other reasons (air conditioning)
There are some days when the heat pump is better than the boiler despite electricity costs
The upfront cost of the slightly more expensive heat pump is made up for by the lower energy cost on the days you use it