on demand water heater

As an alternative to traditional tankless heaters, aliexpress sells a variety of cheap taps incorporating a heater, for example: US $20.2 49% OFF|ATWFS Instant Tankless Water Heater Tap Instantaneous Faucet Kitchen Water Heater Crane Instant Hot Water Faucet Digital EU Plug|hot water...

I recently finished a tiny house build (my dad and I did most of the work, including plumbing, ourselves) and moved into it in August. There was a small issue with the water temp- namely, that I couldn't regulate the water temp in the shower or kitchen. I worked around it by adjusting the temp...