Motors within conditioned space or within
Q = 2545 * HP * Flm * Fum
Em = motor efficiency,
Fum = motor use factor.
(2) Appliances and equipment, such as business
machines and computers. Refer to ASHRAE Handbook, Fundamentals
or contact the EFD or EFA for assistance in determining sensible
and latent heat gains from kitchen equipment.
Qs = 3.41 * W * Fue
Qs = sensible load,
W = appliance wattage, and
Fue = equipment use factor.
Heat Gain From Miscellaneous Sources
(1) HVAC Fan Motors (Outside the Airstream).
Thirty-five percent of the input to an HVAC fan motor is
converted to heat in the airstream because of fan inefficiency.
Refer to par. 220.127.116.11 b)(1).
(2) HVAC Fan Motors (Within the Airstream). The
motor load is converted to heat. Refer to par. 18.104.22.168 b)(1).
(3) Duct Leakage. Loss of supply air due to duct
leakage shall be compensated by system capacity as follows:
(a) Well designed and constructed system:
increase fan capacity by 3 percent.
(b) Poorly designed and constructed system:
increase fan capacity by 10 percent.