When your pellet stove loses its draft or exhaust flow drops off, a worn combustion blower motor is usually the culprit. The Enviro 50-1901 is a direct-replacement exhaust blower assembly built to restore proper combustion airflow in select Enviro and Vista Flame pellet stove models -- no fabricating, no adapters, no guesswork.
The combustion exhaust blower is the heart of your pellet stove's venting system. It draws combustion gases out of the firebox and pushes them through the exhaust flue, maintaining the negative pressure the burner needs to ignite and sustain a clean, efficient flame. When this motor weakens or fails, you may see poor ignition, incomplete combustion, smoke rollout, or error codes on the stove's control board.
The 50-1901 replaces the OEM combustion blower on the Enviro MAXX series and Vista Flame VF170. It is also catalogued as NBK Parts number 20138, so you may find it listed under either reference depending on your supplier.
Designed as a drop-in for the original combustion exhaust blower on compatible models. Matches OEM mounting and electrical connections.
Runs on standard North American household current. No voltage converter or special wiring required for typical US and Canadian installations.
Rated at 3000 RPM to deliver consistent exhaust draw, supporting complete combustion and minimizing creosote-producing incomplete burns.
Class B rated motor insulation handles elevated operating temperatures, appropriate for the demanding thermal environment of a pellet stove exhaust path.
Combustion exhaust blowers operate continuously during stove operation and are exposed to heat, ash particulate, and combustion byproducts. Over time, bearings wear, motor windings degrade, and blower wheels accumulate ash deposits that throw the assembly out of balance. Common symptoms of a failing combustion blower include:
This blower assembly is confirmed to fit the following pellet stove models. Verify your model number on the stove's rating plate before ordering.
Replacing the combustion exhaust blower is a straightforward service task for anyone comfortable with basic appliance repair. General steps include: