Infiltration Calculator

Input Parameters

Imperial (°F, BTU, ft)SI (°C, kW, m)

Volume (cu ft)

Air Changes per Hour (ACH)

Indoor Temperature (°F)

Outdoor Temperature (°F)

Enable Dynamic Analysis

5,040

Infiltration Load BTU/hr

Infiltration Airflow CFM

Temperature Difference70 °F

ACH0.5 ACH

Volume8,000 cu ft

Formula:

CFM = \frac{V_{ft³} \times ACH}{60}

Calculation:

CFM = \frac{8000.00 \times 0.5}{60}

Result:

66.67 \text{ CFM}

Formula:

\Delta T = T_{indoor} - T_{outdoor}

Calculation:

\Delta T = 70 - 0

Result:

70.0 \text{ °F}

Formula:

Q = CFM \times \Delta T \times 1.08

Calculation:

Q = 66.67 \times 70.0 \times 1.08

Result:

5040.00 \text{ BTU/hr}