Can a .85-80H nozzel be used to replace a .85-80B Noxxel?
Thanks
Dennis

The difference is hollow or solid/semi solid. I always replace with the same nozzle that the unit was designed to use. Usually this is listed on the metal tag on the boiler. The reason for different nozzles is the fact that combustion chambers are made different/different size. Use the correct one.

It was quick and to the point