What are the formulas for calculating cfm on oil,natural gas and LP furnaces? Btu input x ? divided by 1.08 x delta T
CFM=OUTPUT/(1.08 x delta T)
Clock the furnace, measure efficiency to get output
The way we build has a greater impact on our comfort, energy consumption and IAQ than any HVAC system we install.
here is another one for you..Electric furnace...
volts x amps x 3.14 = btu output
btu output/ 1.08 x temp rise