ᐅ Heat Pump Efficiency at -12 Degrees?

Created on: 17 Dec 2022 23:55
N
Nutshell
How efficient is a heat pump really, in terms of how much energy you put in versus how much heating output you get when the temperature is around -12°C (10°F)?

I have a new air-to-air multi-split system with a SCOP of 4.6. The unit often freezes up, and after defrosting, there is a significant ice buildup underneath the device. How much of the 4.6 SCOP rating remains at temperatures between -7°C and -12°C (19°F to 10°F)?
N
Nutshell
18 Dec 2022 23:36
Joedreck schrieb:

Well, you can clearly assess the efficiency if you have a separate sub-meter and a heat meter for the heat pump.
Thinking and assuming won’t get you very far here.
Especially since other data like the supply temperature are missing.

An air-to-air heat pump does not have a supply temperature…
You are confusing something there.
S
Smarti99
19 Dec 2022 06:50
Of course, every heating system has a supply line and a return line.
J
Joedreck
19 Dec 2022 07:12
Nutshell schrieb:

An air-to-air heat pump does not have a supply line…
You are mixing something up.

You are right, I didn’t read properly. In that case, you can really just use the datasheet as a reference, I think.