10/27/2026
Your enclosure is sealed. That doesn't make it dry.
Every enclosure breathes. As temperatures swing (day to night, shift to shift, season to season, or after a washdown), warm, humid air is drawn in. When the cabinet walls, door, or components cool below the dew point, that moisture condenses directly onto the surfaces you're trying to protect.
The technical case is simple: keep internal surfaces a few degrees above the dew point, and condensation can't form. Relative humidity of about 65% and up is widely treated as the point where corrosion risk climbs.
What happens without one:
- Corrosion on terminals, contacts, and circuit board traces
- Short circuits, tracking, and ground faults
- Erratic PLC, VFD, and sensor behavior and nuisance trips
- Insulation breakdown and shortened component life
- Unplanned downtime, often traced to a "mystery" intermittent fault
A small heater, a large return. Nexthermal condensation evaporation heaters deliver:
- Silicone rubber heater vulcanized to aluminum or stainless steel mounting plate for even heat transfer and long service life
- Integrated preset snap action thermostat: contacts open above the set point, so the heater runs only when it's needed
- No external controller to wire, program, or maintain
- Standard L-bracket or low profile mounting
- Built to your spec: size, shape, thermostat set point, lead length, and mounting configuration
If there are sensitive electronics inside the enclosure, there should be controlled heat inside too.
Is condensation part of your enclosure maintenance story? Let's talk about the application.
