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andreashm27 Jul 2018 07:44Hello,
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.
M
Mottenhausen27 Jul 2018 12:11I cannot offer personal experience, as we are just in the planning phase ourselves. However, one point to consider is that the cooling function of an air-to-water heat pump negatively affects the overall energy balance. This might mean that the KfW40 standard is no longer met (if that is important to you), or it will need to be compensated for, for example with more photovoltaic area.
We visited a model home exhibition yesterday where some houses had underfloor heating and cooling systems.
Basically, yes, those houses felt cooler compared to the others. But if you sit there for a longer time, your feet actually get cold, even though your head is still sweating. The cold air layer simply doesn’t rise and stays close to the floor.
In the long run, I imagine this would be uncomfortable, as normally you’d want the opposite effect.
During my sock test^^, my feet became icy cold in a very short time, which for me is a sure way to catch a cold.
Basically, yes, those houses felt cooler compared to the others. But if you sit there for a longer time, your feet actually get cold, even though your head is still sweating. The cold air layer simply doesn’t rise and stays close to the floor.
In the long run, I imagine this would be uncomfortable, as normally you’d want the opposite effect.
During my sock test^^, my feet became icy cold in a very short time, which for me is a sure way to catch a cold.
We installed an active ground-source cooling system. Currently, it is 21°C (70°F) on the ground floor, 23.5°C (74°F) on the upper floor, and 28°C (82°F) in the attic.
It is important to note that we also have underfloor heating in the attic, which likely contributes to the cooler temperature on the upper floor. The floor feels cold but is less uncomfortable than the heat. We are currently wondering if the air conditioning was really necessary since it has not been used yet. We would choose to include it again for the small additional cost.
It is important to note that we also have underfloor heating in the attic, which likely contributes to the cooler temperature on the upper floor. The floor feels cold but is less uncomfortable than the heat. We are currently wondering if the air conditioning was really necessary since it has not been used yet. We would choose to include it again for the small additional cost.
M
MelanieSH28 Jul 2018 12:21sla83 schrieb:
We installed active cooling through our ground source heat pump.
Currently, it’s 21°C (70°F) on the ground floor, 23.5°C (74°F) on the upper floor, and 28°C (82°F) in the attic.
It’s important to know that we also have underfloor heating in the attic, which likely contributes to the cooler temperature on the upper floor. The floor feels cold but is still less bothersome than the heat. We’re actually wondering now whether the air conditioning was necessary, as it hasn’t been used yet. We would definitely choose it again for the small additional cost.What additional equipment was required to enable cooling with the ground source heat pump? How much extra did it cost you?
MelanieSH schrieb:
What else was needed to get a cooling function with the ground source heat pump? How much extra did it cost? The extra cost was a gross €1250 including installation by our heating contractor. For Vaillant, this is a Natural Cooling module that is mounted separately on the wall. A quick search on Google shows it costs around €900 at best, not including installation.
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