Insulation surrounding industrial centrifugal fans serves dual purposes of thermal and sound protection. It also creates a sheath around the fan, requiring some accommodation for access when maintenance or repairs are needed. There are multiple fan insulation types to accommodate different applications.

Types of Fan Insulation

There are three main fan insulation types that provide thermal and/or sound protection in industrial applications. They include removable insulation jackets, cladding, and double-walled insulated housing.

Removable Insulation Jacket

When you need easy and frequent access to your fan for maintenance, a removable insulation jacket is a user-friendly fan insulation type. The jacket is installed in panels that are held in place with 10 gauge wires. A single panel covers the fan access door giving you quick access to the fan wheel for inspection and maintenance. Simply disconnect the wires, remove the panel, and open the access door. You can put the panel back in place and reattach the wires after closing the fan access door.


Cladding is a more integrated, cleaner-looking type of fan insulation. Made from various materials, often aluminum, the cladding covers the insulation and fastens down by screws or rivets. Getting inside for maintenance is slightly more involved, requiring removal of screws or rivets, and re-caulking after it’s all put back together to ensure full preservation of the thermal and acoustic qualities.

Double-Wall Insulated Housing

Double-wall insulated housing is the third primary type of fan insulation. It retains the look of the fan with a layer of painted carbon steel serving as the exterior that surrounds the insulation.

When Do You Need Fan Insulation?

Protecting your fan using one of the fan insulation types outlined above can be necessary and/or beneficial for thermal control.

Many industrial fan applications also require a measure of sound attenuation for safety, comfort, communications, and productivity. Each type of fan insulation can help with sound, either on its own or in conjunction with a fan silencer.

Hear it from the Application Engineer

Senior Application Engineer Chet White provides a demo of industrial fan insulation types in this 2:21 minute video.

When you’re ready to start your project, reach out and connect with one of our application engineers to discuss the details of your specification.

Related Content on Fan Insulation Types

Here are two more articles that might be of interest as you think about your application:

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