Hood filter replacement, in a commercial kitchen, means the professional cleaning or replacement of grease filters as part of a documented exhaust system service. The immediate step for any operator is to hire a certified contractor who provides a visible maintenance certificate and before and after documentation, not just a wipe of the visible filter face. The strongest vetting signals are alignment with NFPA 96, verifiable technician certification, and a written scope covering the full exhaust system.
TL;DR:
- The service should include cleaning or replacing grease filters, the hood plenum, duct sections, and the exhaust fan, not just the visible filter face.
- Inspection frequency varies from monthly for solid fuel setups to annually for low-volume kitchens, but local authorities determine exact schedules.
- Contractors must provide a certified maintenance certificate with detailed documentation, including technician training, service scope, and before-and-after photos.
- Costs and job durations depend on kitchen size, grease buildup, and accessibility, with full-system cleanings taking several hours or more.
- Proper preparation and verifying contractor credentials, especially certification like IKECA/PECT, help ensure a thorough, documented cleaning process.
Table of Contents
- What the service includes: filters and the broader exhaust system
- When to schedule replacement or cleaning
- How a qualified contractor performs the replacement and cleaning
- How to choose and vet a contractor: a compact checklist
- Cost and timeline expectations for hood filter replacement
- Preparing your kitchen and what to expect on service day
- Why documented hood filter replacement matters
- How Hoods Kitchen Exhaust helps with filter replacement and documentation
- Sources
- FAQ
What the service includes: filters and the broader exhaust system
A hood filter is one component of a connected exhaust assembly, and quotes that only mention the filter face tend to leave the riskier areas untouched. Manitoba’s design guideline for food handling establishments treats Type I hoods, used where grease-laden vapours are produced, as part of a system tied to ventilation and fire-suppression requirements, not an isolated part (design and construction guideline).
A proper service typically covers:
- Grease filters, either professionally degreased or replaced when damaged, corroded, or no longer sealing properly
- The hood plenum and grease extractors above the cooking line
- Accessible duct sections leading away from the hood
- The exhaust fan and rooftop housing
- Containment measures that keep grease and runoff away from food-contact surfaces during the work
Federal preventive-control rules require equipment to stay free of grease and debris that could contaminate food, and cleaning itself must not introduce a new contamination risk (preventive control requirements). That is why containment and runoff control matter as much as the cleaning itself.
When to schedule replacement or cleaning
Inspection and cleaning frequency depends on cooking volume and cooking method, and NFPA 96 sets out inspection schedules that AHJs commonly reference for this purpose (NFPA 96). In practical terms, kitchens tend to fall into four categories:
- Monthly inspection for solid fuel cooking operations
- Quarterly for high-volume cooking such as charbroiling or wok stations
- Semiannual for moderate-volume kitchens with standard fryers and griddles
- Annual for low-volume operations such as limited-menu or seasonal kitchens
Local authorities can shift these intervals. Manitoba’s regulation requires hoods and filters to be maintained so grease cannot collect or drip onto food-contact surfaces, but it does not set one universal interval, leaving that detail to the authority having jurisdiction (Food and Food Handling Establishments Regulation). Confirm the schedule locally before treating any table as a legal requirement, since code adoption and amendments vary by jurisdiction (Manitoba fire code adoption references).
Regardless of the calendar, some conditions call for immediate service: visible grease deposits on the filter face, drips landing on food-contact surfaces, a noticeable drop in exhaust airflow, or smoke backing up into the kitchen.
How a qualified contractor performs the replacement and cleaning
A proper job follows a sequence, and comparing quotes against that sequence is the fastest way to spot a surface-only clean.
- Inspection and a written scope of work before any tools come out
- Safe removal of filters, followed by degreasing or replacement depending on condition
- Degreasing of the hood plenum and extractor surfaces
- Cleaning of accessible duct sections and connection points
- Rooftop fan inspection and cleaning, including the fan housing
- Reinstallation and an airflow check before the crew leaves
Documentation should follow the Alberta interpretation guidance on maintenance certificates, which recommends a visible maintenance certificate recording the cleaner’s name, the service date, the next due date, areas cleaned, any omissions, and the technician’s training organization. Before and after photos of the filters, plenum, and rooftop fan intake round out the record.
On-site safety measures matter as much as the cleaning itself: isolating electrical components and any hot-work sources, controlling drainage and runoff, and protecting food-contact surfaces from degreasing chemicals throughout the job.
Pro Tip: Ask for a sample maintenance certificate before booking, not after, so you know exactly what documentation you’ll receive.
For a closer look at when filters should be cleaned in place versus pulled for replacement, see this breakdown of clean versus replace decisions.
How to choose and vet a contractor: a compact checklist
Procurement decisions come down to documentation and credentials, not just price. IKECA offers certification programs, including the PECT credential, along with best-practice guidance for whole-system cleaning, and checking for these is one of the more reliable ways to separate serious contractors from surface cleaners (IKECA certification and guidelines).
Before signing a contract, confirm:
- Technician training and certification, such as IKECA/PECT or an equivalent standard
- A sample maintenance certificate showing exactly what fields it records
- Proof of insurance and standard employer compliance documentation
- An itemized scope specifying which components are cleaned versus replaced
- A realistic timeline and references from kitchens of a similar size or cooking type
| Vetting item | Why it matters |
|---|---|
| Technician certification | Confirms training against a recognized standard |
| Sample maintenance certificate | Shows what gets documented and posted |
| Itemized scope of work | Prevents surface-only cleans billed as full service |
| Before and after photos | Provides evidence for insurers and inspectors |
| References from similar kitchens | Confirms experience with your cooking volume |
Red flags include a contractor who only wipes the exposed hood face, resistance to posting a certificate, a vague scope with no line items, or no photo documentation at all. A checklist for choosing a certified cleaner walks through these questions in more detail.
Cost and timeline expectations for hood filter replacement
Timelines vary with scope. A quick filter swap on a single hood can take under an hour, while a full-system clean covering the plenum, ducts, and rooftop fan often runs several hours to a full day depending on kitchen size and access.
Costs move with several factors:
- Kitchen size and the number of hoods and filters involved
- Cooking intensity and grease load, since heavier cooking means more buildup
- Accessibility, particularly for rooftop fan work that requires ladder or lift access
- Whether the job is scheduled maintenance or an emergency call
- Disposal and chemical requirements for degreasing agents and grease waste
When comparing quotes, ask for an itemized scope, a stated next-due date, and a clear description of what documentation you’ll receive at the end. A quote that skips these details is harder to compare fairly against one that spells them out.
Preparing your kitchen and what to expect on service day
A little preparation keeps the job on schedule and protects the record you’ll need later.
- Schedule the work during downtime and secure food away from the service area.
- Move small equipment and clear access to the hood, plenum, and rooftop fan.
- Confirm where the maintenance certificate will be posted and who will receive a copy.
- Arrange for an inspector or AHJ representative to attend if your jurisdiction requires it.
- After the crew leaves, visually check the reinstalled filters, confirm airflow feels normal, and file the certificate and photos with your fire and health records.
More detail on what a typical service day looks like is available in this guide to exhaust cleaning day-of expectations.
Why documented hood filter replacement matters
Working with restaurant and hospitality clients has shown a consistent pattern: kitchens that treat filter cleaning as a documented, certified service pass inspections and insurance reviews with far less friction than kitchens that rely on cheap, surface-only cleans. Certified crews, before and after photos, and a posted maintenance certificate aren’t paperwork for its own sake. They’re the evidence an inspector or adjuster asks for first.
— Jack
How Hoods Kitchen Exhaust helps with filter replacement and documentation
Hoods Kitchen Exhaust provides commercial kitchen cleaning, kitchen exhaust cleaning, and vent hood filter cleaning, along with kitchen appliance and kitchen walls and floors service, for restaurants, cafes, and hospitality kitchens (Hoodskitchenexhaust).
- Technicians handle filter cleaning and replacement as part of a full exhaust system service
- Jobs come with a visible maintenance certificate and before and after photos
- Scheduling reminders are provided to help keep your next service date on track
Pro Tip: When requesting a quote, have your kitchen type, cooking volume, and any rooftop access constraints ready. It speeds up an accurate estimate.
| What to provide | Why it’s asked |
|---|---|
| Kitchen type and menu | Determines grease load and hood type |
| Cooking volume | Affects required cleaning frequency |
| Rooftop access constraints | Affects timeline and equipment needed |
For kitchens weighing a full exhaust clean against a narrower filter service, this comparison of exhaust cleaning versus deep cleaning breaks down the difference. Request a quote through the kitchen appliances and exhaust service page to get started.
Sources
- Food and Food Handling Establishments Regulation, M.R. 339/88 R
- Guideline for the design & construction of a food handling establishment
- 19‑FCI‑002 / 19‑BCI‑017 fixed fire suppression and exhaust systems: cooking, cleaning and maintenance
- Regulatory requirements: Preventive controls for food businesses
- International Kitchen Exhaust Cleaning Association (IKECA) — certification and guidelines
FAQ
What is included in a commercial hood filter replacement service?
A full service covers the grease filters themselves plus the hood plenum, accessible duct sections, and the exhaust fan, not just the visible filter face. Contractors should provide a written scope specifying exactly which components are cleaned versus replaced.
How often should hood filters be cleaned or replaced?
Frequency depends on cooking volume and method, ranging from monthly for solid fuel cooking to annual for low-volume kitchens, based on categories drawn from NFPA 96. Local authorities can set different requirements, so confirm your specific schedule with your local authority having jurisdiction.
What documentation should I receive after the service?
You should receive a visible maintenance certificate listing the technician’s name, service date, next due date, areas cleaned, and any omissions, following the format described in Alberta’s interpretation guidance. Before and after photos of the filters and plenum should accompany the certificate.
How do I know if a contractor is properly certified?
Ask whether technicians hold a recognized credential such as IKECA’s PECT certification, and request proof rather than relying on marketing claims (IKECA). A contractor who can’t produce a sample maintenance certificate or itemized scope is a warning sign.
Does Hoods Kitchen Exhaust provide maintenance certificates?
Yes, Hoods Kitchen Exhaust issues a visible maintenance certificate along with before and after photos for its kitchen exhaust and vent hood filter cleaning services. Details on the services and how to request a quote are available at Hoodskitchenexhaust.
