Kitchen Exhaust Cleaning FAQ
What is the best way to price an initial restorative cleaning for a heavily neglected kitchen exhaust system?
For neglected systems, always perform a physical inspection and avoid quoting over the phone. Present evidence (photos) to the restaurant and estimate based on crew size, hours, and complexity (e.g., $2,500–$3,875 for a bad system requiring multiple crew members). Charge more for the initial restorative clean since it involves heavy scraping and removal of built-up grease. To make it affordable and secure recurring business, consider bundling the first 1–2 cleanings at a reduced rate, then dropping to a lower maintenance price once the system is brought up to standard.
How should I structure recurring service contracts to benefit both my company and the restaurant?
The real profitability comes from regular maintenance per NFPA 96 schedules (e.g., monthly, quarterly, or bi-monthly based on cooking volume—burger places like Five Guys often need at least quarterly). Set a sustainable recurring price the restaurant can afford. Emphasize that consistent service prevents buildup, reduces cleaning time, and avoids fire hazards or shutdowns. Provide photos of the current condition and explain that neglecting maintenance will return the system to its bad state.
What is the most effective tool for removing heavy grease buildup in ductwork?
The magnetic duct scraper (especially the 2-inch or 4-inch version) is the single most impactful tool. It attaches magnetically, uses replaceable razor blades, and allows efficient scraping of solid grease from both vertical and horizontal ducts. It significantly reduces cleaning time, chemical usage, and pressure washing needs. For horizontal ducts, the 2-inch is often preferred; for mostly vertical, the 4-inch works well.
How do you properly secure plastic sheeting to contain grease during cleaning?
Use pony clamps on the filter tracks. For better durability, remove the rubber tips, apply Gorilla Glue, and reattach them—they’ll last years. You can also roll plastic inside the track and clamp it, or clamp sections around grease cups/spouts. Ensure the drain is clear and plastic is tight to prevent leaks, even when running the fan
What is the recommended method for applying degreaser/foam in ducts?
Scrape the majority of grease first, then apply foam degreaser and wash. A dedicated foamer unit (air-injected for thick foam) is far superior to pump sprayers—it allows long hose runs (up to 150+ feet) and better coverage. Most professional degreasers contain sodium hydroxide, potassium hydroxide, a solvent, and a surfactant. Adding a foaming agent (e.g., 2 oz per 5 gallons) improves cling and effectiveness.
Should I scrape or foam first on heavily greased ducts?
Always scrape as much as possible first. Then foam, let it dwell, and wash. On extremely bad jobs, you may need multiple cycles: scrape → foam → wash → scrape again → foam → wash. Proper scraping reduces reliance on pressure washing and chemicals.
How can I clean long or hard-to-reach duct runs?
Use threaded pole extensions (1–4 ft sections) with tools like the magnetic scraper—runs over 20 ft are possible. For horizontal ducts with limited access, work from access panels or the fan. In some cases, add access doors (include in bid) or work from the roof downward.
Do you need to use a pressure washer on every job?
No. Effective scraping (especially with magnetic tools) and foaming often eliminate or minimize pressure washer use. Many jobs can be finished with scraping, foaming, and hot water from the restaurant. Spin jets (like Stinger or yellow/chrome cage nozzles) are useful for tall vertical runs but less necessary overall.
How do you handle cleaning baffle filters efficiently?
Soak in hot water with degreaser, foam both sides, scrub, and rinse (use the dish area wand if available). There’s no perfect easy method—dirty filters are common despite code requiring weekly cleaning by the restaurant. Many cleaners end up handling them to deliver a fully clean hood.
How do you apply polish (like Zola Terra Ultra Sine 100) to the hood exterior?
Use a microfiber rag with polish applied directly or via squirt bottle. For hard-to-reach areas, attach the rag to a mop handle, painter’s pole, or drywall sander head.
Is it safe to apply degreaser/foam and pressure wash around fusible links in the fire suppression system?
Yes. Foam and wash as normal—chemicals and typical pressure/temperatures won’t affect the links (they melt at 350–375°F). Fire suppression technicians often appreciate the cleanliness.
What basic maintenance is typically performed on exhaust fans and makeup air units?
- Replace fan belts (every 6–12 months, often a small additional charge).
- Grease bearings.
- Clean/replace makeup air pads and clean the unit interior.
- Winterize swamp coolers (shut off pump but keep air flowing).
Many companies have separate repair departments for these tasks.
These FAQs are based on proven industry practices from experienced kitchen exhaust cleaners. Proper tools and techniques dramatically improve efficiency, safety, and customer satisfaction.