4 ms·
Even more effective: drain water heat recovery, preheating the incoming water with the outgoing waste heat. Quick overview from one manufacturer here: https://
by sparselogic 5y ago
Even more effective: drain water heat recovery, preheating the incoming water with the outgoing waste heat.
Quick overview from one manufacturer here: https://renewability.com https://renewability.com
- goodpoint 5y agoThat's just a heat exchanger. I wonder if it's worth it tho. Perhaps only if you fill a large tub or a pool every day.
- bobchadwick 5y agoThese devices actually require a similar amount of water to be moving through the drain pipe/heat exchanger and the cold water line that's refilling the water heater. So they're really only effective during showers.
- thinkcontext 5y agoDoE says they breakeven is 2.5 - 7 years. That's in the US, imagine how much of a slam dunk it is in countries with carbon prices and higher energy prices. https://www.energy.gov/energysaver/drain-water-heat-recovery https://www.energy.gov/energysaver/drain-water-heat-recovery