Here is the clean, high-conversion text optimized specifically for your TDH3335 product description metafield:Product Description Metafield: TDH3335Short Summary:The TDH3335 is the residential homebuilder's gold standard for drain water heat recovery (DWHR). Measuring an optimized 33.5 inches in length, this highly efficient system is specifically engineered to maximize energy performance credits in production framing, standard residential plumbing drops, and volume homebuilding configurations. Delivering a verified 42.1% heat recovery rate at standard flow, it provides the perfect balance of cost, physical size, and thermal efficiency.Key Technical Features:Optimized 33.5" Profile: Built specifically to fit comfortably within standard residential floor joists and plumbing drops while delivering high-yield thermal recycling.Smart Thermal Transfer: Recovers 42.1% of baseline greywater energy at full standard flow, dramatically lowering the thermal energy requirements of primary water heating systems.Instant BTU Capture: Instantly pre-heats incoming cold municipal water lines before they reach your water heater, offloading peak hot water grid demands during heavy shower use.Factory-Integrated PEX Ports: Features built-in 3/4" integrated crimp PEX manifold ports, slicing installation times on busy jobsites by eliminating separate copper-to-PEX fittings.Certified Dual-Wall Safety: Engineered with a heavy-duty double-wall copper separation barrier and an integrated vented leak path, guaranteeing 100% fail-safe protection for potable water.Passive Lifespan Asset: Operates 100% passively with zero moving parts, zero electrical connections, and zero filters to clean. Naturally self-scouring and built to match the 50+ year lifespan of the building.Ideal Applications:Volume Residential Subdivisions: The most strategic choice for production builders looking to clear stringent localized energy targets smoothly and economically.ENERGY STAR® & Building Code Approvals: The ultimate compliance tool for energy advisors seeking a predictable, high-value framework to secure performance point incentives.Standard Residential Replacements: Easily retrofitted into existing 3-inch plumbing stacks during basement renovations or mechanical room overhauls.Detailed Specifications:SpecificationValueModel NumberTDH3335 (TDH3335B)Efficiency (Steady State)42.1% @ 9.5 LPM (2.5 GPM)Total Height33.5 inches (85 cm)Drain Diameter3-inch (Copper)Connection TypeIntegrated Crimp PEX ManifoldMaterialHigh-Conductivity Type L/M CopperOriginMade in CanadaSafety ListingCertified Dual-Wall

Certifications: Independently verified to CSA B55.1 for performance and certified to CSA B55.2 for safe potable water contact. System Compatibility: Fully compatible with all high-performance and residential water heater setups, including Tankless, Gas, Electric, Hybrid, and Solar thermal designs. Installation Requirements: Must be mounted vertically. Features an optimized 33.5" long profile that fits standard 3" copper drain stacks (easily adapts to PVC or ABS lines using standard transition couplings). Connection Size: Pre-equipped with factory-installed 3/4" integrated crimp PEX plumbing ports to eliminate the need for separate jobsite adapters. In the Box: Includes the TDH3335B high-efficiency copper core unit and two standard mechanical drain stack couplings. Real-World Performance: Triples a standard hot water tank's shower capacity or boosts a tankless heater's peak winter delivery flow rate by up to 75% by pre-heating cold intake water at a verified 42.1% efficiency. Highly recognized as the industry-standard blueprint for hitting ENERGY STAR® for New Homes points across Canada.