ThermoDrain (46.1% efficiency) TDH3395B-DR-PEX high performance drain water heat recovery unit – factory installed PEX fittings + Free shipping*


The TDH3395B-DR is an energy efficiency upgrade from the TDH3335B-DR-PEX and TDH3335B-DR .

TDH3395B-DR-PEX  Specifications:

  • Comes with factory installed crimp PEX fittings certified to CSA B137.5 and ASTM F1807 (no soldering required)
  • 46.1% Efficiency @ 9.5 L/min (2.5 GPM)
  • When showering, a 46.1% efficient unit is designed to preheat incoming cold water from 50 F (10 C) to 73 F (23 C) @ 9.5 L/min (2.5 GPM)
  • 3″ inner drain diameter
  • 39.5″ Length
  • 8.7 kW Heat Recovery
  • 19.8 lbs
  • Equipped with 2 drain couplings
  • Efficiency verified to CSA B55.1
  • Safety certified to CSA B55.2
  • Download TDH specification sheet

ThermoDrain (46.1% eff) TDH3395B-DR-PEX series

ThermoDrain is an easy and comfortable way to save money and help the environment.

The ThermoDrain TDH3395B-DR-PEX series is the latest technology in Drain Water Heat Recovery. Its unique compact design provides high efficiency and an easier
installation. With its exclusive features, the ThermoDrain™ TDH series is simply the best technology available today!

ThermoDrain technology is recommended by the United States Department of Energy, Manitoba Hydro and Hydro Quebec

Code required in all new home construction in Manitoba and Ontario, Canada.

Click Here to view the Specification Sheets

Click here to view Installation guide

ThermoDrain  Model benefits/ features

  • Enjoy hot showers with peace of mind for the environment and energy costs
  • Feel the heat by triples your tank hot water heater capacity for showering
  • Built with the thickest and purest copper for safety and longevity
  • Safety first with double third party certifications for potable water and efficiency.
  • Enjoy significant flow increase on tankless hot water heaters.
  • Quick payback, great return on investment
  • Compact design/ lightweight
  • Maximum efficiency per inch / cost
  • Easy and fast DIY installation with 2x factory installed PEX fittings
  • Includes easy to install drain fittings
  • 50% efficient units are capable of preheating cold water from 50 F to 75 F @ 2.5 GPM
  • Low pressure drop
  • Fits onto any 3″ drain piping system
  • Fits into any 3/4″ potable water type piping



Drain water heat recovery with factory installed crimp PEX fittings

drain water heat recovery pricing



You may also like…