Hello everyone,
We have been living in our new home with a central ventilation system for just over a year now and are very satisfied so far.
The only issue is the temperature in the attic bedroom (north-east side) in the evening, which is not very comfortable. The room is not even facing south, yet the temperature reaches about 23°C (73°F) in the evening, even though we open the windows wide in the morning to ventilate with cool air and then close the curtains completely.
I suspect that the ventilation system continuously blows warm air from outside (logically) into the bedroom, causing the warm air to accumulate there.
How do you handle this? Is there anything specific to consider?
My ventilation system has been running at level 2 for several months now because I felt the air in the room was fresher, especially during winter. Maybe I could lower it again during summer?
Is there anything else that can be adjusted to improve the situation? Or is the only option to open everything wide for half an hour before going to bed to ventilate again?
I appreciate any advice, tips, or tricks.
We have been living in our new home with a central ventilation system for just over a year now and are very satisfied so far.
The only issue is the temperature in the attic bedroom (north-east side) in the evening, which is not very comfortable. The room is not even facing south, yet the temperature reaches about 23°C (73°F) in the evening, even though we open the windows wide in the morning to ventilate with cool air and then close the curtains completely.
I suspect that the ventilation system continuously blows warm air from outside (logically) into the bedroom, causing the warm air to accumulate there.
How do you handle this? Is there anything specific to consider?
My ventilation system has been running at level 2 for several months now because I felt the air in the room was fresher, especially during winter. Maybe I could lower it again during summer?
Is there anything else that can be adjusted to improve the situation? Or is the only option to open everything wide for half an hour before going to bed to ventilate again?
I appreciate any advice, tips, or tricks.
H
HeimatBauer15 Jun 2023 21:15rick2018 schrieb:
Better control, dehumidification, proper distribution of cooling, high performance… Absolutely agree, no doubt about it. I can fully endorse every point.
A huge advantage of cooling via the heat pump is that it cost me exactly half the price difference between standard room thermostats and cooling-capable thermostats for the entire house. If I remember correctly, that was about 200.-, so I didn’t have to install a proper air conditioner in every room of the house.
rick2018 schrieb:
The waste heat goes into the pool. I would actually love that too – currently, the waste heat is simply vented outside, which I think is a shame, at least during the weeks when I have a pool set up. For my short-term pool use, the effort would be disproportionate, but if you keep the pool year-round, then of course it’s a different story.
H
HeimatBauer15 Jun 2023 21:23rick2018 schrieb:
A standard-sized mechanical ventilation system with heat recovery is not effective for cooling. It needs to be significantly larger in capacity.In my case, I consistently cool the (of course, very well insulated) house to 22°C (72°F) during the summer, and it doesn’t matter to me whether it’s 32°C or 34°C (90°F or 93°F) outside. The cooling isn’t achieved by the system alone: if it’s cool in the morning during summer, I also ventilate completely from bottom to top through the fireplace from 6:00 to 6:30. The south-facing windows are shaded with roller blinds, and I installed a large balcony above the patio doors that blocks any direct sunlight in summer while letting sunlight in during winter. So, at least for my setup, I have to say the cooling capacity is absolutely sufficient—I wouldn’t want it any cooler. Of course, it depends on how the system is sized.
By ventilating during the cool morning hours, providing shading, and buffering through the underfloor heating system, it is possible to achieve a temperature reduction of 2-5°C (4-9°F) when it is hot outside for an extended period.
Of course, this is relatively inexpensive to implement compared to a proper air conditioning system.
This is the downside of modern, well-insulated houses.
Our system is an exception and is primarily used in office buildings and similar structures.
Using waste heat for the pool only makes sense with permanently installed pools. Our waste heat is not sufficient for heating but only provides some buffering.
A small pool can also heat up quickly.
Of course, this is relatively inexpensive to implement compared to a proper air conditioning system.
This is the downside of modern, well-insulated houses.
Our system is an exception and is primarily used in office buildings and similar structures.
Using waste heat for the pool only makes sense with permanently installed pools. Our waste heat is not sufficient for heating but only provides some buffering.
A small pool can also heat up quickly.
HeimatBauer schrieb:
One huge advantage of cooling with the heat pump is that it cost me exactly half the price difference between regular room thermostats and the cooling-capable thermostats for the whole house, so if I remember correctly about 200.-, instead of installing a proper air conditioning unit in every room of the house. That’s kind of like saying, “A huge advantage of moving boxes is that they cost me just a fraction of the price of a wardrobe.”
Basically, that might be true, but the comparison isn’t really meaningful. I can invest several thousand euros in a living space cooling system, or spend 200 euros just to have cold feet. I’d rather have the several thousand euros option. 😉
B
Buschreiter15 Jun 2023 22:53I’m glad I don’t live in a submarine, or rather, in a plastic bag. Single-family house built in 1978, with decent windows and proper insulation, currently 21.7°C (71°F) in the well-ventilated bedroom. I believe excessive insulation is not beneficial for a comfortable indoor climate.
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