4 ms·
The ones I designed in my head, that it turns out exist in the real world, exchange heat from the drain water to warm the cold water flowing to the shower, redu
by shapefrog 4y ago
The ones I designed in my head, that it turns out exist in the real world, exchange heat from the drain water to warm the cold water flowing to the shower, reducing the usage of hot water (https://zypho.uk/ https://zypho.uk/ for example - turns your 10 deg C cold flow to 20 C from the 40C waste flow)
In winter one would like the hot humid air from the bathroom to be heat exchanged and heat dumped back into the property. In summer perhaps feed the input airflow for a water heat pump and again dump out the humid air.
Either way, we leave a lot of efficieny the table.
- theluketaylor 4y agoDrain heat recovery is quite common here in Canada and mandatory in a few jurisdictions for new builds. https://www.homedepot.ca/en/home/categories/building-materials/plumbing/water-heaters/drain-water-heat-recovery.html https://www.homedepot.ca/en/home/categories/building-materia... As for the hot humid bathroom air, that also exists in the form of ERV (energy recovery ventilators). For well sealed houses you route all the exhaust and intake for the home to one place where there is a heat exchanger to minimize the losses from getting fresh air into the house.