What Filter Exchange Service Involves
- Removal of installed baffle filters from the hood
- Machine or manual hot-wash degreasing of filters
- Reinstallation of cleaned filters — or delivery of replacement filters
- Grease collection trough and drip channel inspection
- Documentation of filter condition at each visit
Baffle Filters vs. Mesh Filters
Baffle filters work by forcing grease-laden air to change direction as it passes through angled baffles. The directional change causes grease droplets to condense and drain into a collection trough below the filter. Mesh or aluminum filters — the older wire-woven type — are no longer recommended by NFPA 96 for high-heat commercial cooking because they present a higher fire risk. If your kitchen still uses mesh filters, replacement with baffles is the correct upgrade and is required for code compliance in many jurisdictions.
Filter condition directly affects your hood system's performance. See our full restaurant hood cleaning service for complete system degreasing.
How Often Filters Should Be Exchanged
In most commercial kitchens, baffle filters should be cleaned weekly or every two weeks as part of regular kitchen maintenance. If your kitchen staff does not have a reliable filter cleaning protocol in place, a scheduled filter exchange visit handles it on a set interval without adding to their workload. Kitchens running high-volume fryers, charbroilers, or wood-fired equipment accumulate filter grease faster and typically need weekly service.
How Dirty Filters Affect Your Whole System
A filter clogged with grease restricts airflow through the hood. When airflow drops, the hood cannot capture cooking vapor effectively — smoke and grease migrate into the kitchen rather than the exhaust duct. That grease settles on surfaces, worsens air quality, and can trigger health inspector flags. At the same time, restricted airflow puts the exhaust fan motor under additional load, which shortens its service life. Keeping filters clean is the lowest-cost way to protect the rest of the exhaust system.
Your exhaust fan takes the biggest hit from restricted airflow. Read about our exhaust fan cleaning service and the signs of fan overload.
What Affects the Cost
- Number of filters in the hood system
- Filter size and baffle configuration
- Whether filters are cleaned in place, removed for cleaning, or replaced
- Frequency of service visits