Install a drain water heat recovery system.

Recovering the heat from the drain water (showers, bathtubs and sinks) in the entire home can reduce the total energy bill by up to 10% a year. Drain water heat comes primarily from the shower, but it may also come from sinks, the dishwasher and the washing machine.

Our recommendations :

The system consists of replacing part of the drain (as close as possible to the drain and the hot water tank) with a heat-conducting copper pipe that the potable (suitable for drinking) water intake pipe is wrapped around, to allow for heat transfer. Then, when the hot water from the shower runs out through the drain, it heats the water coming in from the aqueduct, which is then sent to the water heater. This kind of system takes advantages of a basic principle of physics to save energy.

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Costs

Costs higher than conventional options

Costs
	Costs comparable to conventional options
	Costs slightly higher than conventional options
	Costs higher than conventional options
	Costs much higher than conventional options