accounts for about 55% of what you spend in a year on bills so an makes a big difference All well-maintained burn their fuel very efficiently but they inevitably lose some heat in the gases that escape up the flue (a pipe for extracting fumes and supplying fresh air to the )
Read MoreBase model - Values represent a 1000000 Btu/hour -fired -water operated for 1500 full-load hours per year with a thermal of 80% The performance of this standard unit is based on ASHRAE 901-2007 Thermal (E t) - Represents a output divided by input as defined by ANSI Z2113 A thermal rating should be used to
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