ᐅ How to Design an Efficient Heating System for a New Building?
Created on: 22 Jun 2024 13:13
T
Tzubaka
Hello homebuilding friends,
We are currently in the detailed planning phase of our house and need some quick support. The final goal is to build a KFW40 energy standard house.
I have tried to research extensively online but still haven't figured it out.
How exactly should a heating system be designed to be as efficient as possible? Like many new builds, we are planning a heat pump with underfloor heating. I have read that room thermostats should be omitted so the system can self-regulate. I have also read that a buffer tank is a bad idea.
I have read that the heat pump should operate at low temperatures to remain efficient. Additionally, I have read that a separate heat pump should be used for domestic hot water production. However, I have also come across many conflicting opinions.
Our heating technician wants to install a buffer tank with an electric heating element.
Right now, we are quite confused.
Could you help clear up the fog for me? What should an optimally designed heating system look like?
Thanks and best regards from a beginner builder
We are currently in the detailed planning phase of our house and need some quick support. The final goal is to build a KFW40 energy standard house.
I have tried to research extensively online but still haven't figured it out.
How exactly should a heating system be designed to be as efficient as possible? Like many new builds, we are planning a heat pump with underfloor heating. I have read that room thermostats should be omitted so the system can self-regulate. I have also read that a buffer tank is a bad idea.
I have read that the heat pump should operate at low temperatures to remain efficient. Additionally, I have read that a separate heat pump should be used for domestic hot water production. However, I have also come across many conflicting opinions.
Our heating technician wants to install a buffer tank with an electric heating element.
Right now, we are quite confused.
Could you help clear up the fog for me? What should an optimally designed heating system look like?
Thanks and best regards from a beginner builder
nordanney schrieb:
BUT: Please keep in mind that using the cooling function greatly increases the indoor humidity. It then feels like a cool sauna. That is not correct.
I have had a ground source heat pump with cooling function for 4 years, which—when running—is always set to maximum power.
- The cooling effect is about 3°C (5°F) during continuous operation 24/7; subjectively, this is a noticeable difference.
- The dew point monitor has never been triggered, and no condensation has ever formed anywhere (mostly tiled floors).
- The relative indoor humidity rises by a maximum of 10 percentage points at full cooling capacity (measured electronically in almost all rooms), which corresponds closely to the calculated change in relative humidity of the air cooled by 3°C (5°F).
I personally find the function great, especially since it uses only marginal electricity and has a clearly perceptible effect. Calling it a sauna is not accurate. Of course, it is no substitute for a proper air conditioning system, but since the ground source heat pump was already installed for me (not least because there is no outdoor unit and due to funding at that time), the cooling feature was a bonus. Buying a ground source heat pump solely for the cooling function is probably not worthwhile; in that case, the money spent on drilling would be better invested in an air conditioning system. Although a ground source heat pump can also be more affordable when paired with a horizontal ground collector.
N
nordanney29 Jun 2024 00:13Fuchur schrieb:
That is not correct.Fuchur schrieb:
- The relative indoor humidity increases by a maximum of 10 percentage points under full cooling effectThat's exactly what I'm saying. The humidity rises significantly. It feels really unpleasant, especially in the muggy summer.H
Hausbauer2329 Jun 2024 11:06How does it work when you cool with underfloor heating and use an air conditioner to dehumidify somewhere in the house: Does the dehumidified air then circulate throughout the entire house via the mechanical ventilation system, or does the air ultimately go outside again without dehumidifying the other rooms?
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nordanney29 Jun 2024 11:33Hausbauer23 schrieb:
How does it work if you use underfloor heating for cooling and then have a dehumidifier somewhere else in the house with an air conditioning system: does the dehumidified air get distributed throughout the house via the mechanical ventilation system, or does the air eventually go outside again without dehumidifying the other rooms? That should work, but it’s not very practical. In that case, you might as well skip cooling with the underfloor system and just cool directly with the air conditioning.Hausbauer23 schrieb:
Does the dehumidified air then spread throughout the house via the mechanical ventilation system, or does the air ultimately go outside again without dehumidifying the other rooms? A mechanical ventilation system does not circulate air. Extracted air is exhausted outside, and outdoor air is brought inside. There is no mixing of the two air streams in the heat exchanger.
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