Lower Your Energy Bills and Triple Your Hot Water Capacity
Heating water is typically the second-highest utility expense in the average North American home, accounting for up to 25 percent of your total energy consumption. Every time you take a shower, thousands of BTUs of expensive thermal energy are literally flushed down the drain stack.
The ThermoDrain Drain Water Heat Recovery (DWHR) system is a completely passive, maintenance-free energy recovery unit that captures that lost heat and uses it to pre-heat incoming cold city water before it enters your water heater.
Residential Energy Recovery
Never Run Out of Hot Water. Cut Your Heating Bill by up to 40%.
Heating domestic hot water is typically the second-largest utility bill in your home. Every time someone showers, dollars worth of energy pour directly down the drain. The ThermoDrain® TDX Series is a completely passive, zero-maintenance heat exchanger combining an ultra-durable stainless steel outer shell with a high-conductivity copper interior core. It captures waste heat before it escapes—recycling it directly back into your water supply for endless hot showers and immediate monthly savings.
Best Value Spotlight
Why the TDX3240 Offers the Fastest Payback in Home Efficiency
Starts at ~$185 USD
(~$250 CAD Equipment Only)
In home energy efficiency, true return on investment comes down to cost per percentage of energy saved. While whole-home heat pump retrofits or solar arrays cost thousands with 10- to 15-year payback periods, the compact ThermoDrain TDX3240 (24" length) delivers 33.59% certified heat recovery for under $200 USD:
Lowest Cost Per % Efficiency
~$5.50 USD / 1% Recovered
Unmatched capital efficiency across all residential green building technologies.
Rapid Payback Window
1.5 to 2.5 Years
Recovers its entire cost through lower utility bills, continuing to deliver free energy for decades.
Compact 24-Inch Design
Fits Tight Basement Pipes
Engineered for low-clearance vertical stacks, townhomes, and split-level basements.
Engineered for a Lifetime: Stainless Steel Armor & Pure Copper Core
Why ThermoDrain TDX combines two premium metals for unmatched durability and performance.
Rugged Stainless Steel Outer Shell
The exterior is encased in a rigid stainless steel protective jacket. This shields the heat transfer manifold from job-site bumps, basement impacts, and environmental wear while giving the unit superior structural integrity and a clean, modern finish.
100% High-Purity Copper Interior Core
Inside the jacket, all thermal transfer occurs through antimicrobial, high-conductivity copper. Copper transfers heat up to 20 times faster than stainless steel or plastic, ensuring maximum thermal energy is captured from falling drain water in fractions of a second.
How It Works: Clean, Simple Physics (In Plain English)
No motors, no switches, and no computer chips. Just natural thermal transfer and zero maintenance.
The "Falling Film" Effect
1. Water Hugs the Pipe
When warm shower water (~100°F / 38°C) drains down a vertical pipe, it does not tumble down the middle like a waterfall. Natural surface tension forces the water outward to cling to the inner copper wall in a thin, continuous sleeve.
Thermal Transfer
2. Heat Moves Outward
Cold municipal water circulating through the tightly wrapped copper coils instantly absorbs the heat through the highly conductive copper wall—warming the fresh water before it enters your water heater.
Preheated Intake
3. Less Hot Water Needed
Instead of entering your heater at an icy 45°F–50°F (7°C–10°C), cold water is pre-warmed up to 70°F–80°F (21°C–27°C). Your water heater uses a fraction of the power or gas to maintain shower temperatures.
🛡️
100% Drinking Water Safety: Double-Wall Vented Protection
Can drain water ever contaminate your drinking water? An absolute, physical NO.Homeowners often ask: "Is this safe for my family's drinking water?" The answer is engineered directly into every ThermoDrain unit through patented True Double-Wall Vented Technology:
Two Independent Metal Walls
The drain line has its own heavy-gauge copper wall, and the fresh water line has its own completely separate copper wall. They never share a single boundary.
Physical Open-Air Vent Gap
In the impossible event that one wall ever developed a leak over decades of service, water would drip harmlessly out of the external visible vent onto the floor rather than mix into your clean tap water.
Code Certified Across North America
Independently verified and certified to CSA B55.1, CSA B55.2, IAPMO IGC 346, UPC, and NPC plumbing safety codes across the USA and Canada.
Choose the Right ThermoDrain for Your Home
Match your vertical pipe height in the basement or utility room. Longer units recover more thermal energy, while our 24-inch model delivers the absolute highest return on investment.
| Feature |
TDX Compact (24") ★ Best Value & Fastest Payback |
TDX Builder Pro (35") Standard Single-Family |
TDX Net-Zero Pro (61.5") Maximum Heat Recovery |
|---|---|---|---|
| Approx. Equipment Cost | ~$185 USD / $250 CAD | ~$325 USD / $425 CAD | ~$525 USD / $695 CAD |
| Certified Heat Recovery Rate | 33.59% | 42.10% | 55.04% |
| Cost Per 1% Heat Recovery | ~$5.50 USD (Lowest) | ~$7.70 USD | ~$9.50 USD |
| Estimated Payback Period | 1.5 to 2.5 Years | 2.5 to 3.5 Years | 3.5 to 5.0 Years |
| Materials & Construction | Stainless Shell + Copper Core | Stainless Shell + Copper Core | Stainless Shell + Copper Core |
| Required Stack Clearance | 24 inches (61 cm) | 35 inches (89 cm) | 61.5 inches (156 cm) |
| Household Recommendation | 1–3 occupants, split levels, tight basements | 3–4 occupants, standard single-family homes | 4+ occupants, large families, multi-bath homes |
| Maintenance & Moving Parts | ZERO (Completely Passive) | ZERO (Completely Passive) | ZERO (Completely Passive) |
*Note: Have a 4-inch vertical drain stack (common in multi-level luxury homes or duplexes)? The 4" diameter ThermoDrain TD442 delivers 46.20% efficiency across multiple concurrent fixtures.
Fast, Hassle-Free Installation (Under 60 Minutes)
Any licensed plumber or experienced DIY homeowner can install a ThermoDrain TDX unit with standard plumbing fittings.
1. Measure Pipe Height
Find your main vertical drain pipe in your basement or utility room. Check the vertical clearance to see which model (24", 35", or 61.5") fits comfortably.
2. Cut & Secure Stack
Your plumber cuts out a matching segment of existing ABS, PVC, or cast iron pipe and connects the unit using standard plumbing glue or mechanical rubber couplings.
3. Hook Up Fresh Water
Connect your incoming cold supply line to the 360° swivel PEX fittings and route the preheated line to your water heater. Turn the water on—you are set for the next 40+ years!
Ready to Upgrade Your Home's Hot Water Comfort?
Join thousands of homeowners across North America who enjoy lower utility bills and effortless hot water comfort. ThermoDrain pays for itself, outlasts your water heater, and requires zero maintenance.
Ecoinnovation Technologies
TDX Compact | TDX3240 (33.59% Efficiency)
Regular price
$197.33 USD
Regular price
Sale price
$197.33 USD
Unit price
per
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