Kit-fan 3.12"w X 4.25"od

I've been upgrading and doing preventive maintenance on my 25 year old water heater and 40 year old boiler. I've been so happy that SupplyHouse has had everything I've needed, at great prices, and has a new warehouse just a few miles from my home, so I get most all in-stock orders overnight. When I began investigating the parts I needed for my water heater, I became very annoyed when I learned that the plumber who did the installation chose a Wayne burner system. Not that there's anything bad with it, it's been very reliable. The issue is that parts are almost impossible to come by and they are more expensive than more standard Beckett parts like on my boiler. Finding the blower fan here was great. However, it was backordered...since it's not commonly used, it's easy to understand why it's not kept in stock. SupplyHouse was able to special order it, and six weeks later it's in my hands. This blower fan has unique dimensions for the Wayne MSR burner, and there aren't any others out there matching it. In any case, I've got it, and can move forward with my upgrades and preventive maintenance.