Drain water heat recovery - Récupérateur de la chaleur des eaux de drainage

Drain water heat recovery (DWHR). ThermoDrain is a drain water heat recovery unit that recovers energy from waste water and transfers this energy to potable water before entering a water heater. It is different from other heat exchangers in that it has dual walls vented to the atmosphere so that cross contamination between wastewater and potable water is not possible. The heat transfer occurs only when wastewater is flowing down the drain while there is a demand on the hot water heater. This technology can save the homeowner up to 40% on their water heating bills. It can also triple the capacity of a hot water tank for showering. It is considered a comfortable green technology designed for shower lovers who also want to save energy. ThermoDrain is a superior drain water heat recovery technology that is manufactured in North America and comes with an industry leading 10 year warranty.


ThermoDrain™ model selection considerations

In essence, the longer the ThermoDrain, the more drain surface is available for heat transfer to occur. The same rule applies to the drain diameter, the larger the diameter, the more energy can be recovered.

Do not base your selection criteria solely on the efficiency of the units. Several other factors come into play when selecting a model. Drain water type, drain and potable water flow rate and temperature, unit pressure drop, are some of the parameters that need consideration when selecting a unit.  Connection mode and configuration also impact the selection process.

Table no.1 provides a list of common models along with technical specifications.  For help with selecting the proper model for your application please contact a technical representative at EcoInnovation.

Health and safety is a priority to us. EcoInnovation uses only certified copper tubing that is nationally recognized for use with potable water.  To that effect, our potable copper tubing conforms to standard ASTM B88. The center drain tube conforms to ASTM 306.  All soldered fittings conform to standards ASME/ANSI B16.23 or B16.29.  This provides peace of mind in all applications.

All of our ThermoDrain are CSA B55.1 and B55.2 certified.

ThermoDrain technical drawing

 ThermoDrain drain water heat recovery series, model selection guide. 

ThermoDrain drain water heat recovery series, model selection guide. 

 Download CSA B55.1 test results table

Download CSA B55.1 test results table