High-Performance Drain Water Heat Recovery

The most cost-effective path to building code compliance in North America. Certified under CSA B55.1 and B55.2 for single-family, multi-residential, and commercial construction.

Passive Clean-Tech • 40+ Year Architectural Lifespan

Turn lost shower heat into free incoming energy.

ThermoDrain® captures up to 55% of the thermal energy washing down the drain, preheating incoming city water instantly. Zero electricity. Zero moving parts. Certified under CSA B55.1 and B55.2.

Select Your Industry Role ↓ Modeling Calculator (.xlsx)

30–45%

DHW Energy Reduction

< 2.5psi

Certified Potable Drop

3×

Shower Run Capacity

ThermoDrain® TDX Core CSA B55.1 / B55.2 Certified

Vertical Falling-Film Heat Exchanger: Falling shower wastewater clings naturally to the inner copper cylinder wall. Potable cold mains water spirals upward through counter-flow exterior coils, preheating instantly with zero pump draw, no moving parts, and an engineered double-wall air gap.

✔ Direct Solvent Weld (PVC/ABS) ✔ Factory 3/4" PEX Ports

Approved Codes & Mandates

CSA B55.1 / B55.2 cUPC / IAPMO CMHC MLI Select (MURBs) National Plumbing Code (NPC) BC Energy Step Code OBC SB-12 & Section 45L

Solutions by Industry Discipline

Targeted engineering data, software modeling inputs, and commercial margins for every trade:

Single-Family & Multi-Family (MURB) MLI Select & Step Code

Home Builders, Developers & Energy Raters

The lowest cost-per-point in North America. Shaves 4.5 to 6.5 GJ/yr in HOT2000 and secures maximum points for CMHC MLI Select multi-family financing, BC Step Code, or Section 45L without wall or framing changes.

Builder packages, MLI Select & volume pricing →

Mechanical Trade +$300 to $600 Profit

Master Plumbers & Piping Crews

45-minute rough-ins. 3" TDX glues directly into ABS or PVC stacks with factory PEX ports. No torch near joists. Highest-margin add-on per water heater replacement or rough-in package.

Access plumber pricing & install guides →

Consulting Engineers MasterFormat

Mechanical Consulting Engineers

CSA B55.1 certified data curves with pressure drop < 2.5 psi. 4" TD442 models engineered for shielded mechanical couplings on multi-family vertical drain risers.

Download engineering guide specs →

Homeowners Zero Upkeep

Homeowners & Renovations

End cold shower mornings. Delivers up to 3x more continuous shower capacity, cuts water heating utility bills by 30% to 45%, and lasts 40+ years with zero maintenance.

View homeowner retrofit guide →

Grid Infrastructure Peak Shaving

Policy Makers & Utility DSM

A proven non-wire alternative (NWA) that curbs winter electrical morning and evening peaks by 6.5 to 9.0 kW per shower draw without electronics or user intervention.

Review utility policy frameworks →

Capital Cost Analysis

The Compliance Arbitrage

When building codes require a 4.5 to 6.5 Gigajoule reduction, compare the capital expenditure:

Building Measure	Typical Cost per Door	Modeled Energy Reduction	Structural Impact
Triple-Pane Windows (U ≤ 0.18)	+6 000 $ – 10 000 $	3,0 – 5,0 GJ/an	Framing modifications, heavy sashes
Continuous Exterior Insulation (R-10 ci)	+7 500 $ – 12 000 $	4,0 – 6,5 GJ/an	Cladding fasteners, extended jambs
ThermoDrain® Série TDX / TD	~950 $ installed	4,5 – 6,5 GJ/an	Zero framing changes. 45-min rough-in.

ThermoDrain® Model Selection Guide

Engineered for direct inline vertical stack installation on standard DWV drain stacks:

Model	Diameter × Length	Drain Connection	CSA B55.1 Efficiency	Recommended Application
TDX3240B (Compact)	3,0 po × 24,0 po (610 mm)	Direct Solvent Weld (PVC/ABS)	33,59 %	Crawlspaces < 32", low basements
TDX3350 (Standard)	3,0 po × 35,0 po (889 mm)	Direct Solvent Weld (PVC/ABS)	42,10 %	Standard 8' basements, production tracts
TDX3615 (Performance)	3,0 po × 61,5 po (1562 mm)	Direct Solvent Weld (PVC/ABS)	55,04 %	Net-Zero builds, high compliance credits
TD442 (Multilogements / MURB)	4,0 po × 42,0 po (1067 mm)	Shielded Couplings (No-Hub)	46,20 %	Apartments, CMHC MLI Select, central 4" stacks