Drain Waste Heat Recovery System

Heat from the drain water is transferred to incoming water.

Drain waste heat recovery system.

All residential r series units include matching drain connectors and connect easily to a 3 4 in. Non storage systems usually have a copper heat exchanger that replaces a vertical section of a main waste drain. 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. Drain pipe and requires a vertical drain pipe length between fittings of 63 in.

Drain water flows through a spiral tube at the bottom of the heat storage tank. In a gravity film heat exchanger gfx drain water flows through a copper pipe that is wrapped in smaller diameter copper tubing. This is a simple diagram of how a drain water heat recovery system works diagram courtesy of ecodrain. Water heating accounts for approximately 20 to 30 percent of household energy demand.

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. Water heater intake water is preheated by circulation through a coil at the top of the tank. Horizontal drain water heat recovery dwhr system for main drain lines the ecodrain b1000 is the only drain water heat recovery system specificially designed for main drain lines.

A drain water heat recovery unit increases its heat potential the more drain water there is the system demands less energy. The power pipe drain water heat recovery system is an effective way to reduce water heating costs by 20 to 40 and continue saving throughout the entire building lifecycle. 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. Reduce costs and emissions in commercial establishments.

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. This warms the tank water which rises to the top. The efficiency of your water heating system goes up and your water heating bill.