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Replace vintage Carlin 400s-3 with newer Beckett AFG?
I have a circa 1963 Losch boiler with original Carlin 400s-3 burner. From my research I do not think this is a flame retention burner. It is firing a 1.75 X 60A nozzle into a 17"round chamber. The boiler is a two pass boiler and I am not having any problems with the boiler or burner. It runs year round and supplies hot water also. Using about 700-900 gals/yr to heat a 3 story cape in Pennsylvania. I have just purchased a used Beckett AFG off of eBay and will build it up as a spare for the Carlin as I am sure parts will not be available if it breaks down. My question is should I just repace the Carlin with the Beckett once it is setup or should I wait until the old Carlin dies? How much savings could I expect to see by replacing the Carlin with the newer Beckett?