zlacker

Older heat pumps had max temperature limits and did often have resistance heaters to get that last push above 60C. Modern household heat pumps will reach 75C while staying above 100% efficient and can skip the resistance heater.

This is partly due to a change in the refrigerant used.

>>ZeroGr+(OP)
> Modern household heat pumps will reach 75C while staying above 100% efficient and can skip the resistance heater.

Is this adequately maintained even as temperatures drop? I was recently considering getting a heatpump in addition to my gas installation but I assume I need to go for more than a bit better than resistance heating during winter for that investment to make sense.