HOW DOES DRAIN WATER HEAT RECOVERY WORK?
A simple, comfortable and maintenance free passive water heater booster that uses waste heat energy to preheat incoming cold water.
IS DRAIN WATER HEAT RECOVERY WORTH THE INVESTMENT ?
DWHR recovers heat from water that would otherwise be lost down the drain. It works best with simultaneous flows like showers, where there is a demand for hot water at the same time as hot water is going down the drain. The recovered heat can be used to preheat cold water going to the hot water tank or for other purposes permitted by codes and regulations.
A ThermoDrain unit consists of copper pipe tightly wound around a vertical section of copper drainpipe. As water flows down the drainpipe, it clings to the inside surface of the drainpipe. The heat from the drain water is transferred through the copper drainpipe to fresh cold water flowing in the outer copper coil.
The warmed water is then sent either to the hot water tank or other permitted end-use. In either case, the amount of energy needed to provide hot water is reduced. ThermoDrain systems provide greater potential for energy savings as the number of simultaneous flows increases.
ThermoDrain units vary in terms of pipe size, orientation of the drain line, heat exchanger design, cost and energy savings achieved.
For tankless hot water heaters, this means a significant increase in the flow of hot water. For tank hot water heaters this means up to 3x more hot water for showering.
In the shower, you are now mixing warm water with hot water and therefore use less hot water in the shower. Overall saving is up to 40%* on the cost of heating water.THE
DRAIN WATER HEAT RECOVERY BENEFITS
Get more hot water using less energy
- Get three times more hot water with the same water heating tank.
- Tankless on demand hot water systems will provide a higher flow rate.
- Reduce a home’s carbon footprint by one ton of CO2 per year, the equivalent of what one acre of pristine forest can remove.
Reduced energy consumption
- Captures the heat from wastewater primarily from showers.
- Reduced energy costs
- Reduces utility bills.
Easy to install and requires no-maintenance
- 100% maintenance free with no moving parts
- 100% recyclable
- Optional factory installed crimp PEX fittings for easy installation
- Backed up with a 5 year limited warranty
Ten year limited warranty
The ThermoDrain is 100% recyclable and is an environmentally responsible product.
THERMODRAIN IS EASY TO INSTALL WITH
PRE-INSTALLED PEX FITTINGS
The ThermoDrain, drain water heat recovery installation is EASY. There is no soldering required with the optional patent pending crimp style PEX fitting feature. The ThermoDrain is installed vertically on the main drain stack in order to capture most of the hot waste water used. The preheated potable water from the ThermoDrain may be fed in a variety of configurations to either or both the water heater and cold side of the plumbing fixtures using hot water. No maintenance is required, it has a very low pressure drop and has been designed with outstanding efficiency. The ThermoDrain is easy to install and takes no more than 45 minutes with some plumbing experience.
THERMODRAIN, DRAIN WATER HEAT RECOVERY SIMPLE INSTALLATION OPTIONS
In new home construction, the preferred installation configuration is to send preheated water from the ThermoDrain to the water heater cold supply and to the cold water supply of the shower because it provides the most energy savings. In renovation projects, with limited access to the bathroom plumbing or the water heater makes it more practical to use the other two configurations as shown below.