You never go below 1 in efficiency. Worst case the water is heated directly with electricity.
You shouldn’t but you could.
In theory peltier elements are more efficient heaters than resistive heating but if the temp delta are big enough, you lose more heat through conduction than you pump in.
A poorly optimized fireplace may vacuum more warm air out than it radiates in.
alt Hacker News
You shouldn’t but you could.
In theory peltier elements are more efficient heaters than resistive heating but if the temp delta are big enough, you lose more heat through conduction than you pump in.
A poorly optimized fireplace may vacuum more warm air out than it radiates in.