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The genuine OEM Lennox 22W01 (Lennox reference R44299-004) is a complete Riello oil burner assembly for Lennox oil-fired furnaces and boilers. As a fully built unit, it includes the motor, pump, ignition, and flame-retention head engineered to deliver the quiet, clean, high-efficiency combustion Riello burners are known for — matched to the exact specifications Lennox validated for your equipment.
When a complete oil burner reaches the end of its service life, symptoms include hard or failed ignition, repeated primary-control lockouts, sooty or smoky exhaust, unusual noise or vibration, oil odors, and noticeably higher fuel consumption. Because the burner integrates so many components, a full-assembly replacement is often the most reliable and cost-effective fix compared with chasing individual worn parts.
OEM matters for Lennox reliability. The 22W01 Riello assembly bolts up to the factory mounting, connects to the original electrical and fuel supply, and is pre-configured for the flame geometry and firing rate Lennox intended. Generic or mismatched burners can compromise combustion tuning, safety-control operation, and warranty coverage. Install the complete OEM burner Lennox specified for dependable, efficient home heating.