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inefficent oil boiler replacement??
my oil service man did routine maintenance on my old Pennco oil boiler and told me it was operating at 68% efficiency. then he said not to worry about it. At $3.79 a gallon i am definitely worried about losing more than 30% to inefficiency! He said the unit is such heavy cast iron that i am not really losing as much as the electronic gauge says...i dont get it.
but what should I do? If you tell me to replace it, what should i get? currently i have a tankless water heater as well, so that is an issue...the house is a 2 story cape, about 1650 square feet. i use about 750 gallons a year and freeze all winter (keep heat at 62 evenings) unless i turn on the electric heaters..