Tankless hot water heaters are becoming a must-have appliance in homes these days. They purport to offer many benefits – instant and endless hot water, less wasted space, and a smaller carbon footprint as well. They can even be used to power radiant underfloor heating that is a luxury found in many green homes.

Here are some basics about how tankless hot water heaters work. Standard non-electric storage hot water heaters typically are about 60% efficient, meaning that 60% of the energy in whatever fuel they burn is converted into heat for your water. The other 40% of energy is wasted, some due to inefficient burners and some due to the gradual cooling of water stored in the tank through time. Read More »