John Wood Polaris high-efficiency condensing gas tank

Polaris is John Wood's high-efficiency condensing gas water heater for combination systems, described by the manufacturer as suitable for domestic hot water plus radiant and forced-air hydronic heating applications. Its tank is high-grade 444 stainless steel with brass connections, and the manufacturer states the design is built for dependable, trouble-free service.

The heat source is a submerged combustion chamber with a spiral flue, which John Wood states provides up to 96% thermal efficiency. The unit is manufactured of refractory steel that resists corrosion and provides resistance to thermal and mechanical shock even at extreme temperatures, and it uses an ultra-quiet blower and burner to minimise noise. A self-diagnostic system with three external LED lights indicates operational status, and full serviceability from the front is listed for maintenance access.

John Wood states the PR34-100-2NV model meets ENERGY STAR requirements. WaterHeating.ca records the efficiency as a thermal-efficiency figure and does not convert it to a UEF, because the two metrics are not interchangeable. The family is documented at line level because the full model range, inputs and capacities sit in the linked Canadian spec sheet, which is the source used before any model row is published. A combination water-plus-space-heating design is assessed on site, and whether CANRO supplies a Polaris model for a project is confirmed at consultation.