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Reducing nozzle size 30 yr old PB boiler
I have a 30 year old Peerless WB085-WPCT (WB3) with a DHW coil running a Beckett AFG burner using a 0.85 80A nozzle running at 0.89 gals/hr. A heat load calculation using an online calculator came up with 83,000 Btu s needed @ -10F for our 2100 sq. ft. house in this area of Vermont. I wired in a hour meter to the burner last fall and found that when the outside temperature was @ -2F and the boiler was bring the inside temperature from 65F to 70F the burner ran for 1.15 hrs during a 2 hr. period. From everything I have read the current set up for my boiler is more Btu s than is needed for my house. I want to downsizing the nozzle to 0.75. I called Peerless to find out their recommendation, but they don't have the specs for this boiler seeing that they bought the original company in the early 2000s. I was wondering if anyone has an idea whether I can have my tech put in a 0.75 80A nozzle or do I need a different one. I am asking for help here because most of the people I have talked to in my area seem to want more Btu s than less and change is hard. Thanks for any help.