John Wood Condensing gas tankless (powered by Takagi)

This is John Wood's Takagi-powered condensing tankless line, which the manufacturer describes as providing endless hot water when sized appropriately. The durable primary heat exchanger is commercial-grade copper, which John Wood says is more resilient against erosion, and the secondary heat exchanger is Type 316L stainless steel to protect against corrosion. Condensing technology provides up to 0.94 UEF per the manufacturer.

The line vents as a power direct vent with ULC S636 approved PVC, CPVC or polypropylene pipe, or with Category III/IV stainless steel venting, and it produces condensate. Electronic ignition means there is no pilot light. The manufacturer lists the 540 models with a built-in Easy-Link system that links up to four units with no additional parts, and Multi-link up to 20 units with a multi-unit controller; the 540P model carries an integrated recirculation pump. These are the multi-unit features that make the line relevant to small multi-unit residential work as well as single homes.

John Wood states the line can be used in residential hydronic heating applications, carries an industry-leading 15-year heat-exchanger warranty in residential use, and offers a JCT-199 for commercial applications. It takes significantly less space than a tank-type water heater. WaterHeating.ca documents the family at line level because per-model inputs, flows at temperature rise and Canadian availability sit in the linked spec sheet, and it treats recirculation, venting and multi-unit control as design questions for a site assessment rather than catalogue facts. Whether CANRO supplies a specific model for a project is confirmed at consultation.