ᐅ Air-to-Water Heat Pump Operating in Heating Mode – Is This Heating System Vulnerable?

Hello, we received an additional quote from our heating installer to carry out the heating program for the underfloor heating and screed drying using a mobile 20 kW electric heater. Apparently, the air-to-water heat pump cannot do this because it only has an 8 kW output, and if it did work, something would probably get damaged. Of course, I would like to avoid these extra costs and believe that a short-term flow temperature of 45°C (113°F) should be possible with an air-to-water heat pump.

Have you done the functional heating with an air-to-water heat pump? Is the heater in the air-to-water heat pump really that sensitive?

Thanks!

Nonsense. Of course, it is possible. But under certain circumstances, it might not even be feasible.
Why wouldn’t the heat pump be able to deliver 45°C (113°F) supply temperature at +10°C (50°F) outside?
Sure, it becomes inefficient, but that doesn’t really matter for a short period.
If the heat pump can’t reach 45°C (113°F) supply temperature at +10°C (50°F), then it won’t manage 25°C (77°F) supply temperature at -10°C (14°F). And that’s rather unlikely.

We also used an air-to-water heat pump. It was absolutely no problem.

Thank you for the replies. I spoke again with the heating engineer, and we will now carry out the functional heating using the air-to-water heat pump as well. He also checked again with the manufacturer, who apparently saw no problem with it.

Everything is more efficient than using electricity to generate heat directly at a 1:1 ratio.
If it were really cold outside, you might even warn about the outdoor unit freezing, but otherwise: full steam ahead 🙂