Condensation inside control panels and enclosures is a common issue that can quietly lead to serious damage if left unmanaged.
Moisture build up within enclosed spaces can affect electrical performance, reduce reliability and ultimately lead to costly failures. In many cases, the problem develops gradually, going unnoticed until faults begin to appear.
At Preheat Engineering, we support customers in preventing these issues through the use of purpose designed anti-condensation heating solutions.
What causes condensation?
Condensation forms when warm, moisture laden air comes into contact with cooler internal surfaces inside an enclosure.
Fluctuating temperatures, especially between day and night, increase the likelihood of condensation forming within enclosed equipment.
This is common switch and control gear cabinets in outdoor installations.
While primarily designed for switch and control gear cabinets, these heaters are also well suited to a variety of other environments where moisture control is required.
Why it matters
Even small amounts of moisture can have a significant impact on electrical systems and components.
Condensation can lead to:
Electrical short circuits – Corrosion and rust – Reduced insulation performance – Premature equipment failure.
Over time, this can result in increased maintenance, reduced lifespan of components and unexpected downtime.
How Anti Condensation heaters solve the problem
Anti-condensation heaters act as a simple and effective preventative solution.
By gently raising the internal temperature of an enclosure, they prevent the formation of condensation by keeping the dew point under control. This helps ensure that sensitive electrical components remain dry and fully operational.
Why use Preheat’s Anti-Condensation Heaters
The PEREGRINE range of anti-condensation heaters has been specifically developed for use in switch and control gear cabinets where a low wattage solution is required to eliminate humidity.
Available from 20W to 120W, these heaters provide reliable protection across a wide range of applications.
Each unit contains a vitreous enamelled resistor mounted within a perforated sheet steel case, designed for durability and consistent performance. The compact design allows for easy installation within confined spaces.
Key features include:
- Models available from 20W to 120W
- Low wattage, energy efficient operation
- Compact and easy to install
- Robust construction using quality materials
Installation guidance
The power rating required will depend on factors such as ambient temperature and humidity levels. As a general guide, 10 to 12 watts per square metre of panel surface is typically sufficient to prevent condensation.
For best results:
- Mount the heater on the back plate of the cubicle
- Position the resistor horizontally
- Ensure terminals are located at the bottom
- Use a separate thermostat within the enclosure, positioned away from direct heat from the heater
Correct installation helps ensure consistent performance and long term protection.
Protecting equipment and extending lifespan
By preventing condensation from forming, anti-condensation heaters help protect sensitive equipment from damage, reduce the risk of faults and extend the overall lifespan of components.
They offer a low energy, low maintenance solution for improving reliability in environments where moisture would otherwise be a concern.
