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Formulas & Reference

HVAC Formula Library

Explore essential equations used by design engineers for airflow, sensible, latent, and total heat load calculations.

1. Sensible Heat Formula

Used to calculate the heat gain associated with changes in temperature without phase change.

Q_sensible = CFM * 1.08 * Delta_T
Interactive Sensible Calculator
Resulting Sensible Heat: 25,920 BTU/hr

2. Latent Heat Formula

Used to calculate the energy required to change the state of moisture in the air (phase change).

Q_latent = CFM * 0.68 * Delta_W (Grains of moisture)
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