chart of residential electricity consumption: water heating is the No.1 consumer
1. Water heating consumes the No.1 share of your total electricity.
2. Conventional water heaters are neither efficient (COP<1) nor safe (electric shock, gas leakage, burning).
3. Solar water heaters: not good enough because restricted by weathers seriously.
4. Only heat pump water heaters are ideal and perfect alternative: energy efficient (COP>4), Eco-friendly, renewable, clean, safe and stable.
So just make heat pumps as your No.1 option when you are buying water heaters.
| electric water heaters | gas water heaters | fuel water heaters | solar water heaters | heat pump water heaters | |
|---|---|---|---|---|---|
| initial cost | low | low | low | high | high |
| safe | low | low | low | mid | high |
| Eco-friendly | mid | low | low | high | high |
| energy-efficient | N | N | N | Y | Y |
| COP | <1 | <1 | <1 | >4 | |
| stable | Y | Y | Y | N | Y |
