Maintenance for ventilation systems depends upon the type and volume of cooking as well as local codes. The menu, volume and type of unit also will impact how often ventilation systems should be cleaned and how frequent maintenance will be necessary.
Depending on the application, clean grease filters and the capture area on a weekly basis. Less-efficient grease extractors will need cleaning more often. Replace disposable makeup air filters monthly. Twice a year, have the hood and duct professionally cleaned, clean the exhaust fan and inspect the belt. Every six months, thoroughly clean the makeup air unit’s aluminum mesh filters. Depending on local code requirements and the operation, fire suppression systems should be inspected at least twice a year.
When heavy grease buildup is not removed during professional maintenance, the ventilation system can be compromised and will need replacing sooner rather than later.