Hello,
we are currently finalizing the planning of our new single-family house (1.5 stories, slab-on-grade foundation, KfW40 standard, 7 kWp photovoltaic system).
Especially this year, with its extremely hot summer, one naturally wonders whether it makes sense to equip the heating system, consisting of underfloor heating with an air-to-water heat pump, with reversible operation. Apart from the fact that I don’t yet know the additional cost for this function, which will certainly influence our decision, I am interested in your experiences. It is clear that the “cool” underfloor heating/cooling cannot replace an air conditioning system. However, I assume that air conditioning in a modern single-family house hopefully won’t be necessary...
- For those who can switch their underfloor heating to cooling mode in summer: Would you choose this feature again, or was the installation just a waste of money? What did the function cost you (additional cost compared to a regular heat pump/underfloor heating), and what would you consider the maximum value of this function?
- For those who cannot use their heat pump/underfloor heating for cooling: Do you regret the decision—especially after this hot summer—to have foregone this function? In other words, would you buy such a function from the start today? Particularly considering that climate and weather experts predict that long periods of hot summers like this year’s will become more frequent in the future, although certainly not every year (see 2017, a year without a “real” summer in our region).
Thank you for your opinions, both as responses to the survey and, if you like, in more detailed text form.
we are currently finalizing the planning of our new single-family house (1.5 stories, slab-on-grade foundation, KfW40 standard, 7 kWp photovoltaic system).
Especially this year, with its extremely hot summer, one naturally wonders whether it makes sense to equip the heating system, consisting of underfloor heating with an air-to-water heat pump, with reversible operation. Apart from the fact that I don’t yet know the additional cost for this function, which will certainly influence our decision, I am interested in your experiences. It is clear that the “cool” underfloor heating/cooling cannot replace an air conditioning system. However, I assume that air conditioning in a modern single-family house hopefully won’t be necessary...
- For those who can switch their underfloor heating to cooling mode in summer: Would you choose this feature again, or was the installation just a waste of money? What did the function cost you (additional cost compared to a regular heat pump/underfloor heating), and what would you consider the maximum value of this function?
- For those who cannot use their heat pump/underfloor heating for cooling: Do you regret the decision—especially after this hot summer—to have foregone this function? In other words, would you buy such a function from the start today? Particularly considering that climate and weather experts predict that long periods of hot summers like this year’s will become more frequent in the future, although certainly not every year (see 2017, a year without a “real” summer in our region).
Thank you for your opinions, both as responses to the survey and, if you like, in more detailed text form.
A
andreashm28 Jul 2018 13:59Mottenhausen schrieb:
But one point to consider: the cooling function of an air-to-water heat pump negatively affects the overall energy balance, which might mean the KfW40 standard is no longer metHopefully, this won’t be an issue for our house. It already exceeds the KfW40 requirements without the photovoltaic system, and with the 7 kWp on the roof, there should (I am not an expert) still be enough “headroom” for improvements.
M
Mottenhausen30 Jul 2018 15:52Unfortunately, it’s not as simple as just adding up the “+” points and “-” points. Therefore, that would be too general. I would estimate the chance that your KfW 40 house ends up only being a KfW 55 house afterwards at about 50:50.
We decided just yesterday against installing a cooling system because it is too expensive for what is essentially just a convenience. For us, the total cost would have been around €5000 for the additional module of the system, different room thermostats, and necessary measures to protect against condensation. We would now like to ask what preparations might be needed to easily install a “proper” air conditioning system in a few years.
5000€? The additional costs I'm aware of usually range between 800 and 2000... if someone asks for 5000, they're probably trying to rip you off.
We paid an extra 1100€ for Stiebel Eltron, including dew point monitoring. Now, during the hot days, it has been worth its weight in gold, keeping the house at 23-24°C (73-75°F) (of course with good shading), and almost without additional costs. But I wouldn't pay 5000 either...
We paid an extra 1100€ for Stiebel Eltron, including dew point monitoring. Now, during the hot days, it has been worth its weight in gold, keeping the house at 23-24°C (73-75°F) (of course with good shading), and almost without additional costs. But I wouldn't pay 5000 either...
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*thomasD*16 Sep 2018 21:48Hello,
I just registered here because this question is relevant to us as well. I would like to ask again about experiences with the cooling function of heat pumps using underfloor heating. I could imagine that a simple fan might help counteract air stratification.
I just registered here because this question is relevant to us as well. I would like to ask again about experiences with the cooling function of heat pumps using underfloor heating. I could imagine that a simple fan might help counteract air stratification.