Hello,
My husband and I are currently trying to decide which heating system to install in our planned house.
I insist on having a ventilation system and a wood-burning stove in the living room. So the heating should be compatible with these.
Our chosen construction company has now offered us three heat pumps:
Air-to-water heat pump: Nibe F2040-8 with Nibe VVM320
Exhaust air heat pump: Nibe F750 P with supply air module SAM 40
Ground source heat pump: Nibe 1245-6 with deep drilling
My husband currently prefers the exhaust air heat pump because he thinks it works like the air-to-water heat pump but makes better use of the warm air from running computers... Everywhere I read, though, it says: "Avoid exhaust air heat pumps unless you are building a passive house."
Does the supply air module actually make it function somewhat like an air-to-water heat pump, but with better use of the warm indoor air?
The house is planned as a two-story timber frame construction with KfW 55 standard. To be honest, I am completely overwhelmed by this complicated heating topic. The more information I get, the more complex it seems.
My husband and I are currently trying to decide which heating system to install in our planned house.
I insist on having a ventilation system and a wood-burning stove in the living room. So the heating should be compatible with these.
Our chosen construction company has now offered us three heat pumps:
Air-to-water heat pump: Nibe F2040-8 with Nibe VVM320
Exhaust air heat pump: Nibe F750 P with supply air module SAM 40
Ground source heat pump: Nibe 1245-6 with deep drilling
My husband currently prefers the exhaust air heat pump because he thinks it works like the air-to-water heat pump but makes better use of the warm air from running computers... Everywhere I read, though, it says: "Avoid exhaust air heat pumps unless you are building a passive house."
Does the supply air module actually make it function somewhat like an air-to-water heat pump, but with better use of the warm indoor air?
The house is planned as a two-story timber frame construction with KfW 55 standard. To be honest, I am completely overwhelmed by this complicated heating topic. The more information I get, the more complex it seems.
Air-to-water heat pump: Price x (included in the offer) – without ventilation system!
ALWP: +7652€
Ground-source heat pump: +6685€ – without ventilation system, but including drilling, and there might be BAFA funding available here
The house is planned for 4-5 people.
Here are some questions I had:
Does a ventilation system always lead to very dry indoor air?
Some of the mentioned systems have relatively small hot water tanks. Is 180L (48 gallons) enough for 5 people? No way, right?
Since we sometimes have overnight guests who obviously also shower, would it make sense to heat the hot water, like in our current apartment, simply with a tankless water heater?
ALWP: +7652€
Ground-source heat pump: +6685€ – without ventilation system, but including drilling, and there might be BAFA funding available here
The house is planned for 4-5 people.
Here are some questions I had:
Does a ventilation system always lead to very dry indoor air?
Some of the mentioned systems have relatively small hot water tanks. Is 180L (48 gallons) enough for 5 people? No way, right?
Since we sometimes have overnight guests who obviously also shower, would it make sense to heat the hot water, like in our current apartment, simply with a tankless water heater?
How much does a ventilation system cost you?
The subsidy for the ground-source heat pump would be €4500 (if you don’t mess it up – keyword: APPLY BEFORE SIGNING!!!)
The argument against the air-to-water heat pump is mostly nonsense… you’re constantly drawing in cold air. I would honestly base the decision on the price of the ventilation system. The ground-source heat pump will probably be more effective than the air-to-water heat pump, generally speaking. The price difference is only €2200, which you can recover after about 6 to 10 years. Another advantage is that the borehole remains usable even after the heating system is replaced. For the ground-source heat pump, check how deep you need to drill – so how deep the borehole will be. This can vary depending on your soil, so it sounds a bit odd to generalize.
P.S.: I wouldn’t build without a mechanical ventilation system with heat recovery.
The subsidy for the ground-source heat pump would be €4500 (if you don’t mess it up – keyword: APPLY BEFORE SIGNING!!!)
The argument against the air-to-water heat pump is mostly nonsense… you’re constantly drawing in cold air. I would honestly base the decision on the price of the ventilation system. The ground-source heat pump will probably be more effective than the air-to-water heat pump, generally speaking. The price difference is only €2200, which you can recover after about 6 to 10 years. Another advantage is that the borehole remains usable even after the heating system is replaced. For the ground-source heat pump, check how deep you need to drill – so how deep the borehole will be. This can vary depending on your soil, so it sounds a bit odd to generalize.
P.S.: I wouldn’t build without a mechanical ventilation system with heat recovery.
The ventilation system is apparently estimated to cost an additional €13,000.
I assume the €6,685 comes from the fact that I confronted the construction company with an offer from a local heating specialist who offers the Nibe 1245-6 including an 80m (260 feet) borehole for around €14,500, and I said it should roughly even out compared to the air-to-water heat pump.
Another argument against the ground-source heat pump and in favor of the air-to-water heat pump (AWHP) is that the deep borehole contains components that are not easily accessible. You can’t get to them without difficulty.
With above-ground heat pumps, you have easier access if something needs to be repaired.
And yes, I know that I have to apply for the subsidy before signing. But we said if it’s possible, we’ll try, though we are not including it in our plans. We can still add €4,500 spontaneously if needed.
I assume the €6,685 comes from the fact that I confronted the construction company with an offer from a local heating specialist who offers the Nibe 1245-6 including an 80m (260 feet) borehole for around €14,500, and I said it should roughly even out compared to the air-to-water heat pump.
Another argument against the ground-source heat pump and in favor of the air-to-water heat pump (AWHP) is that the deep borehole contains components that are not easily accessible. You can’t get to them without difficulty.
With above-ground heat pumps, you have easier access if something needs to be repaired.
And yes, I know that I have to apply for the subsidy before signing. But we said if it’s possible, we’ll try, though we are not including it in our plans. We can still add €4,500 spontaneously if needed.
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