Hello everyone,
Iâm somewhat heat-sensitive. Until now, I have always lived in apartments that would get extremely hot in summer, despite maximizing shading during the day and ventilating strongly with rapid air exchange at night. Those were the days of my childhood spent in a basement apartment, where even in the height of summer the bedroom stayed pleasantly cool.
To get to the point: I definitely donât want to deal with that in my own home. So, air conditioning is an important topic for me. My question is: what is the best way to maintain comfortable temperatures even in the peak of summer?
I have read that heat pumps can also provide cooling through underfloor heating, although the effect seems to be relatively mild. Itâs also said that mechanical ventilation with heat recovery can be combined with cooling, but here, too, there are obviously fairly strict limitations. Finally, there is the conventional split air conditioning system, which certainly cools well but also consumes a lot of electricity. However, combined with solar panels on the roof, electricity costs should remain manageable since there is usually a surplus of electricity in summer thatâs hard to use otherwise.
What would you recommend considering both cost and comfort? Maybe some combination makes sense, for example cooling with a heat pump via underfloor heating and additional cooling through mechanical ventilation with heat recovery â perhaps a moderate amount of cooling from two systems is sufficient in combination. Who has experience and can share knowledge and opinions?
Best regards,
HB1
Iâm somewhat heat-sensitive. Until now, I have always lived in apartments that would get extremely hot in summer, despite maximizing shading during the day and ventilating strongly with rapid air exchange at night. Those were the days of my childhood spent in a basement apartment, where even in the height of summer the bedroom stayed pleasantly cool.
To get to the point: I definitely donât want to deal with that in my own home. So, air conditioning is an important topic for me. My question is: what is the best way to maintain comfortable temperatures even in the peak of summer?
I have read that heat pumps can also provide cooling through underfloor heating, although the effect seems to be relatively mild. Itâs also said that mechanical ventilation with heat recovery can be combined with cooling, but here, too, there are obviously fairly strict limitations. Finally, there is the conventional split air conditioning system, which certainly cools well but also consumes a lot of electricity. However, combined with solar panels on the roof, electricity costs should remain manageable since there is usually a surplus of electricity in summer thatâs hard to use otherwise.
What would you recommend considering both cost and comfort? Maybe some combination makes sense, for example cooling with a heat pump via underfloor heating and additional cooling through mechanical ventilation with heat recovery â perhaps a moderate amount of cooling from two systems is sufficient in combination. Who has experience and can share knowledge and opinions?
Best regards,
HB1
H
Hausbauer129 Jun 2017 13:58merlin83 schrieb:
Hereâs what Iâve thought through:
1: This summer hasnât been truly hot yet. Neither was the last one. Two or three years ago, we had almost 40°C (104°F) for days on end. Talking to people who have well-insulated homes, thereâs no more insulation to add; the heat just stays inside and can only be partially ventilated out without air conditioning. Thick insulated masonry helps release the stored heat more slowly.
2: Ceiling or floor cooling only manages small temperature fluctuations (also because condensation must be avoided). So itâs not very effective if the house is regularly left open.
3: Cooling through ventilation doesnât work because the air volume is far too low.
4: Air conditioning uses electricity, thatâs true. Hereâs a calculation: a 10 kW system is sufficient for the bedroom, two kidsâ rooms, and living room. The 10 kW is roughly calculated with an efficiency factor of 4. Additionally, thereâs a simultaneity factor averaging around 0.4 (meaning only 40% utilization because rarely is everyone home at once). If I calculate 1,000 operating hours, I get:
1,000 hours x 10 kW Ă· 4 efficiency x 0.4 simultaneity factor = 1,000 kWh x 0.21 Euro = 210 Euro per year -> thatâs less than 20 Euro per month. How much would you be willing to pay for a cool home at 40°C (104°F)?
5: The 1,000 hours include heating phases. Another advantage of air conditioning is that it not only cools quickly and effectively but also heats quickly and effectively.
The system costs about EUR 9,000 including tax here.
Anytime again!That would be worth it to me. Sometimes in summer I actually feel relieved when the weather is bad because then the house finally cools down. Thatâs unpleasant. And Iâd be willing to pay 10 to 15 Euro for a good nightâs sleep. Not to mention itâs also more comfortable in the living areas.
Mycraft schrieb:
Same here...we actually pay about four times as muchCould you please explain that in more detail? I just canât quite imagine you have âŹ800 (about $860) in electricity costs per year solely for the air conditioning... Iâm calculating roughly âŹ100 (about $110) per year per indoor unit.
At the moment, Iâm leaning towards installing air conditioners in the bedroom and office that share one outdoor unit, and possibly an additional separate unit in the living room with its own outdoor unit.
Is your air conditioning integrated into the bus?
We have many south-facing windows, and during a warm Berlin summer, the temperature can reach around 800°C (1472°F)... the system runs continuously. It doesnât make sense to turn it off and let the house heat up again (for example, when you are not at home) because you want to have a cool house again in the evening.
The system is unidirectional on the bus, meaning I can control it via the bus, but I donât receive any status messages from the system itself. However, by monitoring the power consumption and temperatures, you can tell from the bus whether the system is running or not.
The system is unidirectional on the bus, meaning I can control it via the bus, but I donât receive any status messages from the system itself. However, by monitoring the power consumption and temperatures, you can tell from the bus whether the system is running or not.
S
Steffen801 Jul 2017 10:28Well, Iâm curious to see how it will turn out for us. The costs donât really matter to me. Each interior component has a KNX module and is directly connected to the bus.
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