Panel AC Selection Tool

Calculate the exact heat load inside your electrical enclosure and get the right nVent Hoffman air conditioning unit — based on material, dimensions, internal equipment heat, altitude, and temperature requirements.

Enclosure Configuration

Step 1

Enclosure Material

Painted Steel: standard industrial enclosure material.

Step 2

Enclosure Type

Floor Standing
All 6 faces exposed

Wall Mount
5 faces exposed

Floor Standing: all six surfaces exposed to ambient air — maximum heat transfer area.

Step 3

Enclosure Dimensions

Width

Height

Depth

Surface area: — m²

Thermal & Site Parameters

Step 4

Temperature Settings

Desired Inside Temp

°C

Outside Field Temp

°C

ΔT (Outside − Inside)

10 °C

Step 5

Internal Heat Load

500 W

Total equipment
heat dissipation

0 W4000 W8000 W

Step 6

Altitude & Safety Factor

Installation Altitude

Safety Factor: 20%

10%30%50%

Heat Load Calculation

Calculating...

Enter parameters above to calculate.

Calculation Methodology

Q_surface = k-factor × Surface Area (m²) × ΔT (Outside − Inside, °C)
Q_total = (Q_surface + Q_internal) × Altitude Correction × (1 + Safety Factor / 100)

Recommended AC Capacity = next standard unit above Q_total
Reference: IEC 890 / Thermal Management of Electrical Enclosures