Direct-Fired Heater Formulas

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Direct-Fired Formulas

Heating Requirements

Input BTU/Hr =

(Blower SCFM * Temp Rise * Density Factor) / .92

Temp Rise =		(Input BTU/Hr * .92)
		Blower SCFM * Density Factor

Density Factor =		1.08 +	(70-Blower Temp) * .024
			10

Output BTU/Hr

Output BTU/Hr =

Input BTU/Hr * .92

Profile Velocity

Profile Velocity =

945 * sqrt(Profile Pressure / 0.075)

Burner Areas

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