I have a older Fuel oil Furance it is a Lennox (OF7-140M) It is 112,000btus The Burner is model OHP31c-7. What am looking for is the proper nozzle that I should be using right now Im using a (.75/70deg-A). Could someone tell me if this is the right nozzle??
Make : Lennox Fuel-oil Furance
Model : OF7-140M
The nozzle sounds a bit small because it looks like the Furnace is 140,000 btu which be at 1.00 gpm nozzle so under firing it will not hurt it and you will use less oil this way. As far as the degree angle that would be listed in manual and or rating plate located in burner compartment.