ᐅ Is an air source heat pump sufficient for a harsh winter in the Black Forest?
Created on: 29 Dec 2015 15:16
J
Jackie
Hello,
we are just starting the planning phase for a KfW55 prefabricated house, and our builder recommends an air-source heat pump for heating, specifically a "Stiebel Eltron LWZ 304 Trend."
The house will be built in two parts and will have approximately 140m² (1,507 sq ft) of living space. Additionally, we plan to install a pellet stove in the living-dining area on the first floor, which will be directly fed with pellets to provide an additional decentralized heat source.
My question is: Is such an air-source heat pump solution sufficient during cold winters in the Black Forest, when temperatures drop to around -25°C (-13°F)? What are your general experiences? Our builder praises the advantages of the air-source heat pump, but for me this is new territory, so some input would be very helpful.
we are just starting the planning phase for a KfW55 prefabricated house, and our builder recommends an air-source heat pump for heating, specifically a "Stiebel Eltron LWZ 304 Trend."
The house will be built in two parts and will have approximately 140m² (1,507 sq ft) of living space. Additionally, we plan to install a pellet stove in the living-dining area on the first floor, which will be directly fed with pellets to provide an additional decentralized heat source.
My question is: Is such an air-source heat pump solution sufficient during cold winters in the Black Forest, when temperatures drop to around -25°C (-13°F)? What are your general experiences? Our builder praises the advantages of the air-source heat pump, but for me this is new territory, so some input would be very helpful.
EveundGerd29 Dec 2015 20:43With only three months of use, the value is not significant.
I’m not the only one who has an air-to-water heat pump, so surely users with more experience will also share their insights.
@Cascada
I didn’t say anything different. I just meant that in case the heat pump fails, the apartment still doesn’t get cold, which is a positive thing.
@Cascada
I didn’t say anything different. I just meant that in case the heat pump fails, the apartment still doesn’t get cold, which is a positive thing.
tomtom79 schrieb:
The electricity cost is at a special rate of 0.20 cents per kWh.You probably mean 0.20 €, right?
tomtom79 schrieb:
I’m not the only one who has an air-to-water heat pump, so I’m sure users with more experience will chime in.
@Cascada
I didn’t say anything different. Just that in case the heat pump fails, the apartment still doesn’t get cold, and that’s a good thing....then that (@@Cascada, the heating and ventilation systems are theoretically separate; additionally, if the controlled residential ventilation fails, an auxiliary heating element activates.) was probably just an oversight.
To my knowledge, every heat pump has an auxiliary heating element.
At -25 degrees Celsius (−13°F), the coefficient of performance (COP) is likely to be between 1.5 and 2.0, assuming the unit is still operating properly (!), and the heating output of this heat pump would be around 2.0 to 2.5 kW. Therefore, substantial supplemental heating from an electric heating element will be necessary, as the heating demand will probably exceed the calculated heating load based on standard design temperatures, which are typically around -16 or -18 degrees Celsius (3 or 0°F). Unfortunately, I could not find this information: does this heat pump have a built-in or retrofit electric heating element?
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