If you're scheduling hood vent cleaning for the first time, switching providers, or just want to know what a compliant job should look like, this guide walks through exactly what happens before, during, and after a professional cleaning visit from GreaseKleen.
- Most cleanings are scheduled during off-hours to avoid disrupting kitchen operations.
- A complete job covers hood, filters, ductwork, access panels, and rooftop fan — not just visible surfaces.
- Cleaning must reach bare metal to satisfy NFPA 96 and pass fire inspection.
- Documentation — service stickers, reports, and before/after photos — is provided at the end of every visit.
- The kitchen is left clean and ready for the next shift with all equipment reinstalled.
Scheduling and Preparing for Your Cleaning
We work around your business hours whenever possible, scheduling most cleanings during nights, early mornings, or days you're closed. This minimizes disruption to service and gives our technicians full access to the kitchen without staff working around them. Before we arrive, cooking equipment should be turned off and cooled down completely — grease residue is easier and safer to remove once it has hardened slightly, and hot surfaces create a burn risk for technicians working close to the hood and duct openings.
Step-by-Step: The Cleaning Process
1. Site Protection
Before any degreasing begins, we cover floors, cooking equipment, and nearby surfaces with protective materials. This keeps grease runoff and cleaning solution contained to the work area rather than spreading across your kitchen.
2. Filter Removal
Baffle filters are removed from the hood and either hot-tank cleaned in our shop equipment or replaced outright if they're damaged or beyond effective cleaning. Filters that are warped, corroded, or missing baffles reduce airflow and grease capture, so we flag these for replacement rather than reinstalling a compromised part.
3. Hood Interior and Exterior Cleaning
The hood itself — interior surfaces, plenum, and exterior — is scraped to remove hardened grease deposits and then degreased down to bare metal. This is where the bulk of visible buildup typically lives, and it's also the area an inspector checks first.
4. Ductwork Access
We open every access panel along the duct run rather than cleaning only what's reachable from the hood opening. Interior duct surfaces are scraped and degreased section by section, since grease tends to accumulate unevenly — often thicker at bends and horizontal runs where vapor slows down and condenses.
5. Rooftop Fan Service
Rooftop exhaust fans are hinged open using their hinge kit (or carefully detached if no hinge kit is installed) so we can clean the fan housing, blades, and motor compartment exterior. We also clean and empty grease containment trays or cups around the fan base to prevent runoff onto the roof.
6. Documentation
Before-and-after photos are taken throughout the job, and we apply a dated service sticker inside the kitchen along with a written service report. These records are what you'll hand to a fire inspector or insurance adjuster when asked to prove your cleaning history.
| Cleaning Stage | What We Check |
|---|---|
| Filters | Warping, missing baffles, grease saturation |
| Hood interior | Bare-metal finish, seam integrity, drain condition |
| Ductwork | Access panel condition, buildup at bends, hidden pooling |
| Rooftop fan | Hinge kit function, motor exterior, grease containment |
What Happens After Cleaning
Once the system is fully cleaned, we clean up all protective coverings and any residue in the work area, reinstall or replace filters, close and secure all access panels, and do a final visual walkthrough with you if you're on-site. Your kitchen is left ready for the next shift with no lingering odor or degreaser residue on food-contact surfaces.
What a Rushed or Incomplete Job Looks Like
Not every provider does this work thoroughly. Warning signs of an incomplete cleaning include technicians who only wipe the hood front without opening access panels, filters that go back in without being fully degreased, rooftop fans that are never inspected because there's no hinge kit and no one wants to disconnect ductwork, and no service sticker or written report left behind. If your last cleaning didn't include any of these steps, it likely wouldn't pass a close inspection.
How Long Does It Take?
A single-hood system in a standard restaurant typically takes a few hours from setup to final documentation. Kitchens with multiple hoods, longer duct runs, or heavier grease accumulation take longer. We'll give you a time estimate specific to your kitchen layout when we quote the job.
Frequently Asked Questions
Do I need to be present during the cleaning?
Not necessarily, as long as we have access to the kitchen and roof. Many clients provide a key or alarm code for after-hours service and receive their documentation by email.
Will the cleaning chemicals leave a residue on food-prep surfaces?
No. We use degreasers appropriate for commercial kitchen environments and thoroughly rinse and wipe down all surfaces before leaving.
What if you find damaged equipment during cleaning?
We note any damaged filters, corroded duct sections, or fan issues in your service report so you can address them before your next fire inspection.
Ready to see the difference a thorough cleaning makes? Schedule your hood vent cleaning with GreaseKleen, or explore our service packages for recurring maintenance. Call (713) 575-7392.
