ᐅ Heating System Choice: Air-to-Air or Air-to-Water Heat Pump
Created on: 19 Jun 2023 11:18
K
KatlarOne
Hello everyone,
we are just at the very beginning of our home building journey – specifically in choosing the construction company. Neither of us are experts, and we are currently educating ourselves a lot -> please excuse us if some technical terms are unfamiliar or used incorrectly 😉
Among many other questions, we are uncertain about the heating system.
Construction Company A strongly recommends an air-to-air heat pump – meaning a central ventilation system with 'heating through the air flow.'
Company B suggests an air-to-water heat pump – combined with underfloor heating + still a central ventilation system.
And now about our lack of knowledge…
The air-to-air solution seems initially cheaper – but according to the advisor from Company B, there are disadvantages:
- Every room is the same temperature -> so having a cold bedroom and warm living room wouldn’t be possible?
- Warm air always rises -> so the floor would feel cold.
Neither of these issues would occur with underfloor heating since it can be controlled separately, and of course, your feet would be warm.
I don’t want to start a (new) fundamental debate – just wondering if you see it the same way? Unfortunately, we don’t know anyone who heats ‘with air’ 😉
we are just at the very beginning of our home building journey – specifically in choosing the construction company. Neither of us are experts, and we are currently educating ourselves a lot -> please excuse us if some technical terms are unfamiliar or used incorrectly 😉
Among many other questions, we are uncertain about the heating system.
Construction Company A strongly recommends an air-to-air heat pump – meaning a central ventilation system with 'heating through the air flow.'
Company B suggests an air-to-water heat pump – combined with underfloor heating + still a central ventilation system.
And now about our lack of knowledge…
The air-to-air solution seems initially cheaper – but according to the advisor from Company B, there are disadvantages:
- Every room is the same temperature -> so having a cold bedroom and warm living room wouldn’t be possible?
- Warm air always rises -> so the floor would feel cold.
Neither of these issues would occur with underfloor heating since it can be controlled separately, and of course, your feet would be warm.
I don’t want to start a (new) fundamental debate – just wondering if you see it the same way? Unfortunately, we don’t know anyone who heats ‘with air’ 😉
W
WilderSueden21 Jun 2023 09:25There are also regular loans, and when building a new house, you usually get a few thousand euros extra financed through the bank. However, with interest rates of 3.5–4% and costs of 1500–2000 euros per kWp (kilowatt peak), I would question the economic viability. Self-consumption in summer is quickly covered, but each additional kWp mainly relies on feed-in tariffs and only to a lesser extent on self-consumption in winter. You really need to look at the specific prices.
K
KatlarOne22 Jun 2023 10:23Since the discussion has shifted somewhat towards solar energy, here is my main question again.
KFW40+ with photovoltaic system and a small battery storage (I can’t find the size requirements at the moment)
-> Does an air-to-water heat pump make more sense because it offers more future flexibility?
I tend to say that underfloor heating provides a nicer warmth than air heating - do you agree?
KFW40+ with photovoltaic system and a small battery storage (I can’t find the size requirements at the moment)
-> Does an air-to-water heat pump make more sense because it offers more future flexibility?
I tend to say that underfloor heating provides a nicer warmth than air heating - do you agree?
R
RotorMotor22 Jun 2023 10:56KatlarOne schrieb:
Since the discussion has shifted somewhat towards solar, here’s my main question again.
KFW40+ with photovoltaic system and a small storage (I can’t find the size requirement right now)
-> Does an air-to-water heat pump make more sense since it offers more future flexibility?
I tend to say that underfloor heating provides a more comfortable heat than air heating – do you agree?Basically, yes.How much more expensive is the air-to-water heat pump solution compared to an air-to-air heat pump?
K
KatlarOne22 Jun 2023 11:08I don’t know the exact difference yet, as the quotes came from two different companies. Just going by intuition—the underfloor heating will definitely be a bit more expensive—are there any benchmark prices?
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