Drain Waste Heat Recovery System

All residential r series units include matching drain connectors and connect easily to a 3 4 in.

Drain waste heat recovery system.

Heat from the drain water is transferred to incoming water. According to csa testing with the r3 60 performance is proportional to rated efficiency. The efficiency of your water heating system goes up and your water heating bill. With a drain water heat recovery system the cold water heading to the water heater first picks up some of that waste heat from the drain pipe.

In a gravity film heat exchanger gfx drain water flows through a copper pipe that is wrapped in smaller diameter copper tubing. It works even better when the incoming fresh water is already warm. Non storage systems usually have a copper heat exchanger that replaces a vertical section of a main waste drain. Some of these devices may even store the water in a tank heating it while it is standby by flowing warm drain water in the bottom.

The energy department estimates that energy losses in hot water amount to 80 to 90 a good argument for installing a drain water heat recovery dhr system. It is the ideal solution for saving energy in single story homes homes built on crawl spaces and manufactured homes. Drain pipe and requires a vertical drain pipe length between fittings of 63 in. Water heating accounts for approximately 20 to 30 percent of household energy demand.

This warms the tank water which rises to the top. Water heater intake water is preheated by circulation through a coil at the top of the tank. This is a simple diagram of how a drain water heat recovery system works diagram courtesy of ecodrain. How it works multi family applications.

Thus it enters the water heater pre warmed and will take less heat energy and money to get it up to temperature. A drain water heat recovery unit increases its heat potential the more drain water there is the system demands less energy. Reduce costs and emissions in commercial establishments.