Lennox Lennox GCWB95 (gas-fired condensing combination water boiler)

The GCWB95 is the top of Lennox's current gas boiler line: a modulating gas-fired condensing combination water boiler rated 95% AFUE and listed as ENERGY STAR qualified on the official boilers page. The specifications page prints its fuel as natural gas, a pre-mix stainless steel burner, direct spark ignition (DSI), a 15-year limited warranty on the heat exchanger and a 10-year limited warranty on covered components, with sizes listed as 22-150 mbh, 29.5-205 mbh and 22-150 mbh across the combination and heating outputs.

As a combination boiler the GCWB95 covers both space heating and domestic hot water from one appliance, which is why Lennox's page describes it as a combination water boiler rather than a heating-only unit. The 2020 Boilers Brochure shows the generation it belongs to alongside the GWM-IE combination boiler it succeeded, and the current site now lists the GCWB95 as the sole combi in the line.

The model is part of Lennox's US catalogue; no Canadian boiler sales statement was found, so the series is recorded canadianStatus 'unknown'. No per-model rating rows are printed on the official pages - they print size ranges rather than individual model rows - so Boilers.ca publishes the series without model-level records, and any gas, combustion or venting work belongs with a licensed contractor.