Panel AC Heat Load Calculator

Calculate the required cooling capacity for electrical enclosures based on physical and environmental factors

Enclosure Material *

Mounting Type *

Width *

Height *

Depth *

Total Max Equipment Power *

Watts

Max Outside Temp *

Max Internal Temp *

°C

Site Altitude *

Safety Factor *

Default: 1.2

Fill in the form and calculate to see results

Painted Steel

5.5 W/m²·°C

Stainless Steel

3.7 W/m²·°C

Aluminium

12.0 W/m²·°C

Fibreglass

3.5 W/m²·°C

Total Heat Load = (Surface Heat Transfer + Internal Heat Load) × Altitude Correction × Safety Factor

Surface Heat Transfer: k-factor × Surface Area × Temperature Difference

Internal Heat Load: 100% of equipment power (W)

Altitude Correction: Factor increases with altitude (1.0 to 1.25)

Safety Factor: Recommended 1.2 (20% margin)