Put on a hot heater when taking a shower. In theory you'll turn the water heat down which stops a lot of loss, 1 kg air is ~1000 liters, 1 kg water is 1 liter.

Put on a hot heater when taking a shower. In theory you'll turn the water heat down which stops a lot of loss, 1 kg air is ~1000 liters, 1 kg water is 1 liter. It'll also flow back into the house. And I get out sooner because it's not scary outside. This person has installed two drain-water heat recovery systems, and measured it https://www.tiktok.com/@johnsavesenergy/video/7046572667121487110 https://www.tiktok.com/@johnsavesenergy/video/70465726671214... This is the proper way forward.