How Often You Need to Change Your Spray Duct Filter?


It’s an easy question to ask and a tough one to answer. It all depends on the kind of booth you have and the kind of filter you use. Each filter has a specific lifespan, so it’s critical that you’re using the right filter for your booth.

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Why Should You Change Your Filter?

There are several reasons why you should practice good hygiene when it comes to your spray booth filter system. First and foremost, you’ll ensure a high-quality paint finish and maximize the lifespan of your booth when you use the right filters and change them when necessary. But you’ll also be compliant with health and safety regulations regarding the control of dangerous gases.

The Different Types of Filter

Spray booths use intake and exhaust filters to ensure maximal airflow so nothing compromises your paint finish and no harmful air pollution enters the workshop.

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– Inlet filters are usually located in the ceiling and panels and are designed to remove particles at points of entry for an impeccable finish.
– Extract filters can be found on the floor and are sometimes located opposite the inlet filters and are designed to remove solvent vapour and overspray to keep the air clean.

Spray booth filters are manufactured from several different types of materials, including:

– Cardboard concertina filters: these stores easily yet offer a large surface area for maximal filtration. They have a high capacity and can last five times longer than fibreglass or polyester filters.
– Ceiling insert filters: for use with a down-draft system, these filters last longer than those in a cross-draft booth.
– Fibreglass roll: easy to use and economical with very effective extraction filtration.
– Layered paper filter: requiring a minimum of six layers, this type of filter allows fine filtration of lacquer and paint.

Depending on the type of booth you use, you may need secondary extractor spray booth filters or denaturants for water wash spray booths.

Your Filter-Changing Schedule

Following the manufacturer’s instructions is not always enough. For example, if you regularly use high volumes of paint, your filters will need changing more often, and it’s good practice to get into the habit of checking your day-to-day operations. If paint is lingering or particles are appearing in the finish, it’s definitely time to change your filters.