FAQ 2: Kitchen Exhaust Cleaning Tools, Techniques, and Business Insights
Q: Does the foaming method completely eliminate the need for scraping?
A: No. Scraping is still essential. Thorough scraping removes the bulk of grease before foaming and washing, allowing you to use a much smaller pressure washer (e.g., 2-gallon 1500 PSI electric unit) or even just hot water from the mop sink. Proper scraping cuts down on chemical use, water use, and overall job time.
Q: What pressure washer setup do experienced crews commonly use with the foaming method?
A: Many crews use a compact electric pressure washer such as the AR630 TSS Hot (around $1,500). They often run quarter-inch hose instead of 3/8-inch for easier handling and manipulation. Hot water is pulled directly from the restaurant’s mop sink.
Q: How does the foaming process typically work on a job?
A: Apply multiple coats of foam, let it dwell 5–8 minutes (use this time to scrub filters etc.), then wash. Repeat foam-wash cycles until bare metal is achieved. Stubborn spots can be spot-scraped as needed.
Q: Are large hot-water pressure washers necessary for most jobs?
A: Not for 80% of jobs. With good scraping and foaming, most crews can complete work using smaller electric units or even just hot water from the mop sink. Larger hot machines are mainly reserved for very heavy grease, such as Asian-style cooking (rubberized, high-temperature grease).
Q: What is the recommended magnetic scraper size for different duct types?
A: The 4-inch magnetic scraper saves the most time and is ideal for vertical ducts. The 2-inch version is better for horizontal or lateral ductwork because it stays attached better on the sides and top (the 4-inch can pop off at welds or joints).
Q: What starter scraper kit is recommended for someone new to the foaming system?
A: Start with the Starter Scraper Bundle (includes various scrapers for different situations) plus one magnetic scraper (2-inch or 4-inch, depending on your typical jobs). This avoids buying every specialized scraper upfront.
Q: How should hoses be run up a shaft or to the roof?
A: Keep the pressure washer and foamer on the ground (usually in the kitchen). Drop a rope down the duct or over the side, then pull the foamer and pressure washer hoses/guns up. At the hood opening, create a loop with both hoses inside the plastic containment and secure them with a 2-inch pony clip at the top of the hood so drips fall back into the plastic.
Q: How do you manage wastewater and drainage during cleaning?
A: Use commercial blue air conditioning pads (available from Grainger or similar) over the mop sink or dish sink to filter grease while letting water pass through. Clip them in place with pony clips. Some crews build shoots from plastic directly to the drain. Always test with water first to avoid backups.
Q: What is a good way to get old grease off of roofs?
A: Use Commercial OxiClean powder. After initial washing, sprinkle it on wet, stubborn grease spots on the roof and let it dissolve over time. It works best when the surface is wet and will continue breaking down grease until the next rain or service.
Q: Is Zola Terra Ultra Shine 100 better than baby oil for polishing hoods after cleaning?
A: Yes. Apply a small amount to a microfiber rag after cleaning. It performs better than baby oil, provides a good finish, and is easier to work with.
Q: What are typical pricing concerns in the kitchen exhaust cleaning industry?
A: Prices around $395–$400 per hood are very low and often not profitable after labor, insurance, fuel, and overhead. Many established companies have raised prices to $650–$750+ for straightforward jobs to achieve reasonable margins (e.g., 30%). Complex jobs (horizontal ducts, malls, multi-tenant buildings) command higher rates. Initial cleanups are usually priced higher than routine services.
Q: How should you approach raising prices with existing customers?
A: Send a clear letter explaining rising costs (insurance, fuel, labor). Offer to negotiate if needed. Some companies phase in increases gradually (e.g., immediate jump to $500 for long-term customers, then higher later). Evaluate accounts annually based on difficulty, location, and service quality.
Q: Are there any special considerations for cleaning fans on pitched roofs?
A: Yes. Use proper fall protection and harnesses when working on pitched roofs due to fall hazards. Charge accordingly for the added safety requirements and time. Flat roofs with adequate parapet walls (39 inches or higher) typically do not require fall protection under OSHA.