Ensotech Extraction Booth Filters: why regular maintenance is the first rule of laboratory hygiene
An efficient filtration system is the core of every Ensotech extraction booth, and regular filter replacement is essential to ensure clean, safe, and hygienic spray decoration in professional pastry, chocolate, and food production laboratories.
In our systems, filter maintenance is not just a routine task—it is what determines the overall efficiency of the extraction unit.
How the Filtration System in Our Booths Works
Ensotech extraction booths feature a three-stage filtration system, specifically designed to capture the microparticles generated during the spraying of cocoa butter, chocolate, and fat-soluble food colourings, preventing them from dispersing into the working environment.
Stage 1 – Primary Filter
The first filtration stage can be configured with either an inertial labyrinth filter featuring a zig-zag airflow path, designed to capture larger overspray particles while maintaining maximum airflow and extraction efficiency, or with a washable AISI 304 stainless steel labyrinth filter, offering easy cleaning, long service life and quick replacement.
This modular approach allows ENSOTECH spray booths to be configured according to the specific application, ensuring the highest filtration performance for different products, production environments and spraying technologies.
Stage 2 – Acrylic Filters
Located immediately behind the labyrinth filter inside a stainless steel housing, the acrylic filter consists of two layers of specially designed acrylic media that retain most grease particles and fine droplets contained in oily mists.
Stage 3 – Absolute Filter
Installed in the upper section of the booth, the absolute filter is the highest-efficiency filtration stage, capturing even the finest particles, including food colour pigments.
This allows the extracted air to be filtered and safely recirculated into the laboratory without requiring external ducting, helping protect the operator’s respiratory health.
On Cabin Pro and All in One models, the integrated hour meter and pressure switch continuously monitor operating hours and filter saturation, notifying the operator when replacement is required.
Filter saturation is a gradual process and is not always visible to the naked eye. The booth may continue extracting air, but filtration efficiency progressively decreases. For this reason, we recommend regular visual inspection of the filters rather than waiting until extraction performance noticeably declines.
The Consequences of Delayed Filter Replacement
Postponing filter replacement has a direct impact on the performance of the entire extraction system.
- Reduced air quality: Saturated filters allow product particles to escape into the workspace, contaminating surfaces, equipment, and the air breathed by operators.
- Lower extraction performance: Restricted airflow forces the motor to work harder, reducing its service life.
- Less uniform spraying results: Inefficient filtration affects spray consistency, compromising the aesthetic finish of pralines and decorated products.
- Risk of hygiene non-compliance: In food production environments, poor filtration performance may jeopardise compliance with hygiene and safety standards.
How Often Should the Filters Be Replaced?
Replacement frequency depends on several factors, including daily production volume, the type of product being sprayed, and the intensity of booth usage.
Laboratories working continuously with cocoa butter and food colourings will naturally consume filters more quickly than those with occasional use.
As a general guideline:
Labyrinth Filter (Stage 1)
- Heavy use: Replace every month
- Medium use: Replace every 3 months
- Light use: Replace every 6 months
Acrylic Filter (Stage 2)
- Heavy use: Replace once or twice per month
- Medium use: Replace every 3 months
- Light use: Replace every 6–12 months
Absolute Filter (Stage 3)
- Heavy use: Replace every 3–6 months
- Medium use: Replace twice per year
- Light use: Replace once per year
There is therefore no single replacement schedule suitable for every production environment.
During technical support, we always recommend that customers inspect the filters regularly and schedule replacement before saturation affects the overall performance of the extraction booth.
We also recommend periodically cleaning the fan assembly, which can be accessed from the top of the booth, using a soft cloth dampened with warm water.
Fast Maintenance with No Production Downtime
Our extraction booths are designed to make maintenance quick and straightforward, minimising production downtime.
All filters can be easily removed and replaced by the operator without specialist tools. This has been a key design priority from the very beginning, ensuring uninterrupted operation for laboratories that rely on our equipment every day.
At Ensotech, we consider regular filter replacement a direct investment in product quality, operator safety, and equipment longevity.
We support our customers throughout the lifetime of their equipment by providing dedicated technical assistance and genuine replacement filters for every model in the range—Mini Cabin, Cabin Pro, and All in One—to ensure extraction performance always remains at its highest level.
Download the filter cleaning instruction manual here.
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