The vast majority of energy advisors will recommend using ThermoDrain technology in a NET ZERO or R2000 build standard whenever possible. The cost of recovering waste energy from drain water versus other means of energy efficiency products is incomparable.
THERMODRAIN TD372B and the TD360B are the choice models for the R2000 & NET ZERO standard. They are highly robust and very energy efficient.
Click on the link to view the Natural Resources Canada certification on performance. The ThermoDrain is Intertek safety certified to CSA B55.2 & Intertek performance verified to CSA B55.1.