Load & DesignQuestion 5 of 110
The sensible heat formula uses which constant when air volume is in CFM and temperature difference is in degrees F?
a.0.68
b.1.08
c.4.5
d.0.24
Explanation
Sensible heat (BTU/hr) equals 1.08 x CFM x delta-T, where 1.08 combines air density, specific heat, and a time conversion. The 4.5 factor is used with enthalpy for total heat, and 0.68 is used for latent load with grains of moisture. These formulas let technicians verify airflow and capacity.
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