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View Full Version : How old is this Deloc-heat Boiler DB4S

Stabile
Jun 8, 2010, 06:20 PM
I have a Delco-Heat Boiler Mo# DB4 S Service # 5065939 how old is this boiler.What is the original efficiency rating.
hvac1000
Jun 9, 2010, 04:30 AM
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