Lochinvar & A.O. Smith 100109314 Burner 318973-401 The internal filtration media is

The internal filtration media is rated at 40 microns

eliminating the need for complex internal lead swapping

and Payne package units and air handlers without the need for mounting bracket modifications

Failure to equalize these pressures significantly reduces the tank's 3

The kit is a complete burner and door assembly

Lochinvar & A.O. Smith 100109314 Burner 318973-401 The internal filtration media isThe Lochinvar & A. O. Smith 100109314 Burner Assembly is a factory spec NAT FV BURNER ASSY #33 ORF engineered for high efficiency residential and commercial natural gas water heaters. As a critical combustion component, this OEM burner door assembly facilitates a precise fuel to air ratio to maintain system integrity and prevent flame failure conditions. It includes a calibrated #33 orifice, ensuring consistent thermal output and clean combustion for