4 ms·
We had a good one like that in our previous apartment. They consist of a large cylindrical metal "heat sink" where cold air coming in goes through the bottom ha
by semi-extrinsic 5y ago
We had a good one like that in our previous apartment. They consist of a large cylindrical metal "heat sink" where cold air coming in goes through the bottom half, warm air going out leaves through the top half, and the entire thing rotates at ~ 5 RPM. Not any more noisy than regular kitchen ventilation. But they need to be big, ours was the size of a small dishwasher and that was adequate for a 75 square meter apartment.
Edit: if you are buying such a thing you should get someting oversized, e.g. for a 180 square meter home you should find a unit that is specified for "200 to 350 square meters", not "75 to 200".
- bluGill 5y agoNo, buy the right size. Those things are better than an open window, but they are still pretty bad from an energy standpoint. Larger ones either run less often, or run leak more energy out of the house.
- flyingfences 5y agoNowadays it seems that simpler Heat Recovery Ventilators are the go-to solution. They're more straightforward crossflow heat exchangers, with no moving parts (except the fans, of course). Energy Recovery Ventilators are also available, built with a permeable interface to retain humidity as well as heat.
- undersuit 5y agoThe state of Montana runs a data center with three 16' 'heat wheels' for the primary cooling. They are pretty cool, if I ever have a large enough hole into my attic space I might get one more appropriately sized like yours.