Drain Waste Heat Recovery System

It works even better when the incoming fresh water is already warm.

Drain waste heat recovery system.

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. All residential r series units include matching drain connectors and connect easily to a 3 4 in. Drain pipe and requires a vertical drain pipe length between fittings of 63 in. 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.

How it works multi family applications. Drain water flows through a spiral tube at the bottom of the heat storage tank. This warms the tank water which rises to the top. 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.

It is the ideal solution for saving energy in single story homes homes built on crawl spaces and manufactured homes. This is a simple diagram of how a drain water heat recovery system works diagram courtesy of ecodrain. The efficiency of your water heating system goes up and your water heating bill. Non storage systems usually have a copper heat exchanger that replaces a vertical section of a main waste drain.

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. Water heating accounts for approximately 20 to 30 percent of household energy demand. Heat from the drain water is transferred to incoming water.

Reduce costs and emissions in commercial establishments. In a gravity film heat exchanger gfx drain water flows through a copper pipe that is wrapped in smaller diameter copper tubing. Water heater intake water is preheated by circulation through a coil at the top of the tank.