Calculator

Cooling power calculation

This calculator helps you estimate the amount of cooling air your enclosure or housing needs to safely dissipate generated heat. After entering several values, you'll see how ambient temperature, power loss and altitude affect the required ventilation performance. This allows you to easily select a suitable fan or cooling unit and ensure stable operation of electronics.

1. Temperature difference (ΔT)

Determines how much warmer the air inside the cabinet may be than the ambient environment. A smaller temperature difference means a higher required air flow. Consider daily and annual temperature fluctuations or nearby heat sources.

Maximum ambient temperature (°C) Desired internal temperature (°C)

2. Installed power loss

Each component inside the cabinet generates heat during operation. The total power loss represents the amount of heat that needs to be removed. Include converters, relays, power supplies, controllers and other devices that run continuously.

Total installed power loss (W)

3. Altitude correction

The higher the installation is above sea level, the thinner the air and the less effective it is at removing heat. Entering altitude adjusts the calculation according to the lower air density at greater heights.

Altitude (m)

4. Results and fan selection

The calculated air flow (m³/h) indicates the amount of air required to maintain the specified temperature inside the cabinet. The required capacity can also be achieved using multiple fans. The result is for guidance only and should be verified by a designer or specialist.

Heating power calculation

This calculator estimates the heating power required to maintain the desired temperature or humidity inside an enclosure. Enter data about dimensions, material, installation type and climatic conditions to obtain an indicative heating power value.

1. Cabinet dimensions

Enter the external dimensions of the cabinet in millimetres (mm).

Height (H) Width (W) Depth (D)

2. Construction material

Select the cabinet material or enter your own heat‑transfer coefficient..

Heat‑transfer coefficient (W/m²K)

3. Location and installation

Selecting location and mounting method accounts for differences in heat dissipation depending on installation conditions.

Cabinet location Installation type

4. Continuous power loss

Power loss inside the cabinet reduces the required heating output because the devices themselves generate heat.

Total continuous power loss (W)

5. Climatic conditions

Heating elements and warm‑air fans from GHV Trading help not only to prevent undesired low temperatures but also to avoid air‑humidity condensation. Select the intended function of the heating and fill in the relevant values.

1) Heating maintains the minimum internal temperature to prevent temperature drop.

Lowest ambient temperature (°C) Required minimum internal temperature (°C) Temperature difference (K)

2) Heating maintains a certain humidity level in the cabinet to avoid condensation.

Highest ambient temperature (°C) Highest ambient humidity (%) Target internal humidity (% – max 65 recommended) Altitude (m a.s.l.)

3) Heating maintains both minimum temperature and a certain humidity in the cabinet.

Lowest ambient temperature (°C) Required internal temperature (°C) Highest ambient humidity (%) Required internal humidity (%)

6. Result

The calculated heating power (W) indicates the output needed to maintain the specified temperature and humidity under the selected conditions. The result is for guidance only.