While this is a 22-inch 4-blade propeller

For the veteran tech

2-inch thickness profile

this component is optimized for R404A and R507 refrigerants

Lochinvar & A.O. Smith 100135293 Burner Kit 319847-401 While this is a 22-inchThe Lochinvar 100135293 Burner Kit is a critical OEM replacement component engineered for high efficiency commercial water heaters, specifically compatible with A. O. Smith BTH 120 250 and Lochinvar AWN AWL 151 286 series models. This pre mixed combustion burner ensures precise gas to air ratios, maintaining thermal stability and reducing NOx emissions across variable firing rates. As a direct fit replacement burner, it resolves common combustion