For everyone still considering whether to install some form of cooling, I would say YES!
Today it’s almost 40°C (104°F) outside. Phew! Luckily, back then we opted for "cooling yes or no?" and chose yes.
Our cooling runs very energy-efficiently through our ground source heat pump in the floor (the cold is basically just pumped upwards). We have a comfortable 22.1°C (72°F) in the rooms.
Honestly, this climate change is really annoying me. If anyone has a plot of land to sell cheaply at the North Cape, please get in touch.
Today it’s almost 40°C (104°F) outside. Phew! Luckily, back then we opted for "cooling yes or no?" and chose yes.
Our cooling runs very energy-efficiently through our ground source heat pump in the floor (the cold is basically just pumped upwards). We have a comfortable 22.1°C (72°F) in the rooms.
Honestly, this climate change is really annoying me. If anyone has a plot of land to sell cheaply at the North Cape, please get in touch.
S
Steffen8025 Jul 2019 23:20Bookstar schrieb:
During such long heatwaves, only air conditioning helps. The stones, floors, and everything else heat up. When you ventilate, the air briefly exchanges, but immediately all the materials release heat back into the new air like an oven. So, ventilating is almost useless.Some people just don’t get this here. At 40°C (104°F) — 42.6°C (108.7°F) record! — nothing works anymore… no mechanical ventilation systems, no open windows... nothing at all. The only solution is active air conditioning. Period! At least for those who want to stay well below 26… 27… 28°C (79… 81… 82°F).
Status: 11:19 pm, outside temperature 26.7°C (80°F). When I look out the window… what do I see? Some people have their windows wide open, letting the heat in. Such heroes…
EDIT: or letting the heat out, if it was 30°C (86°F) inside before.
B
boxandroof26 Jul 2019 01:13After a cozy train ride (there was water), I was able to check the thermometer: 24.8°C (76.6°F) on the ground floor, 25.8°C (78.4°F) upstairs, which is still comfortable. Only the bedroom is warmer :/ Presence alone isn’t enough to heat the small room outside of winter. Starting tomorrow, I will slightly cool with the underfloor heating, so the temperature stays around 24°C (75°F) everywhere.
The mechanical ventilation with heat recovery helps in that we have fresh air during the day and can keep the windows closed. The air is then cooled significantly below 30°C (86°F) via the heat exchanger. Without the mechanical ventilation running during the day, the house would probably be somewhat cooler. At night, the heat exchanger is off if it’s cooler outside. But as noted, cooling at night via mechanical ventilation doesn’t work at all; all the windows would need to be opened early in the morning, and even that would only help slightly.
With this weather, the house warms up by about 0.5°C (0.9°F) per day. Getting rid of the heat without air conditioning will take even longer.
I would like to understand how some manage to stay at 22°C (72°F) without cooling. However, I don’t doubt it.
The mechanical ventilation with heat recovery helps in that we have fresh air during the day and can keep the windows closed. The air is then cooled significantly below 30°C (86°F) via the heat exchanger. Without the mechanical ventilation running during the day, the house would probably be somewhat cooler. At night, the heat exchanger is off if it’s cooler outside. But as noted, cooling at night via mechanical ventilation doesn’t work at all; all the windows would need to be opened early in the morning, and even that would only help slightly.
With this weather, the house warms up by about 0.5°C (0.9°F) per day. Getting rid of the heat without air conditioning will take even longer.
I would like to understand how some manage to stay at 22°C (72°F) without cooling. However, I don’t doubt it.
H
HilfeHilfe26 Jul 2019 05:44Fummelbrett schrieb:
It is 2:21 AM. We just spent an hour in the 33°C (91°F) warm pool. Had a Bacardi Sunrise, so the temperature in the bedroom doesn’t really matter.Cool, I’m going for a jog now.The key to controlled residential ventilation is a ground heat exchanger. It can be quite effective in a Central European climate.
Our house is also gradually heating up. The worst part is the kitchen extension. It has a flat roof and large, older windows. You might as well stay outside.
Our house is also gradually heating up. The worst part is the kitchen extension. It has a flat roof and large, older windows. You might as well stay outside.
Bookstar schrieb:
Please think carefully BEFORE you write something. A controlled residential ventilation system has a volume flow rate that is far too low. You can figure out or look up the rest yourself...
With a window, I can achieve in a few seconds or at most minutes what a controlled residential ventilation system does.
And don’t bring up huge controlled ventilation systems now. I’m talking about the standard units installed in 99% of cases. Well, I just got up. The bedroom is 1.5°C (3°F) cooler than last night before going to bed.
Now at 7 a.m., it’s already 24.3°C (75.7°F) outside. I’m not opening a window anymore.
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