3 ms·
Last year, I made https://github.com/pmarks-net/exhale https://github.com/pmarks-net/exhale to automatically ventilate my house when CO2 levels are high, using
by p1mrx 4y ago
Last year, I made https://github.com/pmarks-net/exhale https://github.com/pmarks-net/exhale to automatically ventilate my house when CO2 levels are high, using a smart switch connected to the bathroom vent.
- Retric 4y agoYou can use heat recovery ventilation to swap indoor and outdoor air far more efficiently than using a simple exhaust fan. The basic idea idea is you run a heat exchanger between the air you’re venting outside and the air you’re replace it with. Commercial versions run around 1,000$ but you can DIY something that’s reasonably efficient for far less. Just remember counter current flow: https://en.wikipedia.org/wiki/Heat_exchanger#/media/File:Comparison_of_con-_and_counter-current_flow_exchange.jpg https://en.wikipedia.org/wiki/Heat_exchanger#/media/File:Com...