John Wood ProLine Direct Vent gas tanks

ProLine Direct Vent models are John Wood's sealed-combustion gas tanks for homes where a conventional chimney is unavailable or not usable. John Wood describes a balanced flue design with a side-wall vent termination: combustion air is drawn from outside through a coaxial vent rather than from the heated air inside the home, and the exhaust leaves through the same assembly.

Because the design needs no electric fan or external power supply, John Wood states it operates quietly and is suitable for closet installations. The sealed combustion chamber is what removes the need for a flammable-vapour sensor on this family. The manufacturer lists a thermopile pilot designed to withstand environmental conditions such as downdrafts, an LED indicator that confirms the pilot is on and provides diagnostics and troubleshooting information, a glass lining for corrosion protection, a top-mounted heavy-duty anode rod, an easy-to-access combustion chamber and a conveniently located drain valve.

John Wood also states the line was proven through ten years of laboratory testing and field trials, including nine winters in extreme cold. A 50 USG high-input model is offered for combination applications and carries 3/4 in side taps. WaterHeating.ca documents the family at line level because per-model capacities, inputs, first-hour ratings and efficiency figures sit in the linked Canadian spec sheet, which is the source used before any model row is published. Whether CANRO supplies a specific ProLine Direct Vent model for a project is confirmed at consultation, and CANRO names John Wood among the brands it services on its own pages.