The warranty on kitchen extraction equipment is usually written as twelve months, but it is actually won or lost in a handful of weeks: the handover date, the first defect, the first claim, and the final inspection before retention is released. This guide is for the buyer side: the restaurant owner, the project manager fitting out a site, or the dealer managing a customer’s installation. It separates the defects period from the warranty, shows how to set the start date in your favour, and walks through the claim file, the response timelines and the retention mechanics that decide whether year one costs you arguments or nothing at all.
The Defects Period and the Warranty Are Two Different Clocks
Purchase documents often blur two obligations that behave differently. The manufacturer warranty is the supplier’s promise that the whole unit is free from defects in materials and workmanship, typically for twelve months; under it, the supplier repairs or replaces faulty components. The defects liability period is the contract clause under which the installer or supplier must make good anything that does not perform as specified, whether the root cause is a component, an installation detail or a commissioning error. They usually run in parallel, but they answer different questions: the warranty asks whether the part was sound, the defects clause asks whether the system does what the contract said it would.
Keeping the two apart matters because they fail differently. A power supply that dies in month three is a warranty item. A hood that captures poorly from day one because the duct was sized to a smaller fan is a defects item, even though every component inside it is brand new and individually warrantied. If your paperwork only mentions the warranty, the second problem has no home, and you will spend the year arguing about whose component failed while the kitchen still smells.
| Event in month one | Where it belongs | Who pays to fix it |
|---|---|---|
| High-voltage power supply stops output | Manufacturer warranty | Supplier: repair or replace the unit |
| Capture falls short; duct velocity below design | Defects liability clause | Installer or supplier, per contract split |
| Cell wash due, unit tripping on load | Wear and service item | Buyer, through the maintenance routine |
| Fan damaged by jet-washing the motor | Misuse | Buyer; may also void warranty |
Set the Clock at Commissioning, Not at Shipment
The single most valuable sentence in a supply contract is the one defining when the warranty and the defects period start. Shipment date punishes the buyer: equipment can sit in a port, a warehouse or a half-finished fit-out for months before it is ever switched on, and a shipment-based clock can eat a third of the cover before the first service. Negotiate the start as the date of commissioning and acceptance, evidenced by a signed acceptance record. Where commissioning is delayed by the supplier, the clock should pause; where it is delayed by site readiness, agree a backstop, for example cover starts no later than a stated number of months after delivery regardless.
The acceptance record is not a formality; it is the baseline every later claim is measured against. It should capture the readings that prove the system left the factory working: fan current draw, ESP cell voltage and current at the test points, filter condition, measured airflow or face velocity at the hood, and noise level if that was a contract requirement. When something drifts in month five, the difference between a claim and an opinion is whether you can put month-zero numbers next to month-five numbers.
The Snagging List at Handover
Handover day is when leverage is at its highest and attention is at its lowest. Walk the installation with the installer’s supervisor and write down every imperfection: a vibrating panel, a door that does not seal, a light fitting loose in the canopy, a filter that sits crooked in its frame, an access panel that needs two people to open. Photograph each one, put them in a numbered snagging list, and attach it to the acceptance record with agreed rectification dates. Sign the acceptance as complete except for the attached list, never with verbal assurances. A snagging list signed at handover converts month-one frictions into scheduled work; the same defects discovered in month two become disputes about who noticed what first.
What Is a Defect, and What Is Not
Most warranty friction comes from classifying an event wrongly, on either side. Suppliers occasionally file genuine failures under wear; buyers occasionally file wear under warranty. A fair classification table is worth agreeing before the first event:
| Category | Typical examples | Outcome |
|---|---|---|
| Manufacturing defect | Power supply stops output; cell arcing from a deformed plate; control board fault; weld failure on the plenum | Warranty: supplier repairs or replaces |
| Installation defect | Duct leakage at joints; fan misaligned; insufficient make-up air; hood not level | Defects clause: installer makes good |
| Wear item | ESP cell dirty beyond recovery; collector plates bent in washing; sealing strips aged; insulators tracked by deposits | Buyer, on the maintenance interval |
| Operating error | Wrong detergent on cells; water ingress into the power supply; running with filters removed | Buyer; may limit warranty cover |
| Third-party damage | Forklift strike; builder debris in the plenum; roof works dislodging the cowl | The party causing it, or the site insurance |
Note where the consumables line sits. ESP cells, aluminium collector plates, sealing strips and ceramic insulators are consumable wear items on most commercial extraction equipment; they are replaced on interval, not claimed. A claim file that opens with a photo of a dirty cell is how buyers lose credibility for the claims that matter.
Building the Claim File
A claim is a document with a photograph attached, not a telephone call with feelings attached. Before contacting the supplier, assemble five things:
1. Identification: unit serial number, model, installation date, commissioning record reference. 2. The event: date, time, what was observed, what the kitchen was cooking, what changed recently. 3. Evidence: photographs or video of the failure, the surrounding installation and any error indications; readings from the cell test points or fan current if safely obtainable. 4. History: the maintenance log since handover, cleaning certificates, and the dates of any filter or carbon changes. 5. Impact: whether the kitchen traded, closed, or switched to reduced service, with dates.
The maintenance history is the part buyers most often underestimate. The warranty is conditioned on documented servicing at the stated intervals, and the first question a supplier’s engineer asks is when the cell was last washed. A complete log turns that question into a formality; an empty log turns every claim into a negotiation about your operating discipline instead of the supplier’s component.
The Claims Sequence, Step by Step
Run every claim the same way, so nothing depends on mood or memory:
1. Notify in writing within the contractual window. Most supply agreements require notice within 14 to 30 days of discovery. Notify even when the fault seems minor; late notification is the cheapest defence a supplier has.
2. Demand an acknowledgement. A response within two working days, with a named engineer or case owner, is a reasonable ask to write into the contract.
3. Accept remote diagnosis first. Photographs plus test-point readings resolve a large share of cases without a site visit; insist that the supplier states in writing what the photographs prove or fail to prove.
4. Agree the remedy path. Replacement part dispatched, engineer visit scheduled, or unit exchange. Record who pays freight in each case; good contracts put warranty parts and freight on the supplier.
5. Verify after repair. Repeat the relevant acceptance readings and record them next to the commissioning baseline. A repair without a verification reading is a claim that can reopen.
6. Close with a report. Cause, remedy, parts used, verification readings, and a statement of whether the defect revealed a wider issue, for example a batch of cells or a series of power supplies.
7. Escalate on a ladder, not ad hoc. Case owner for ten working days, then the supplier’s service manager, then commercial escalation. If the contract allows, a joint third-party inspection at the supplier’s cost when positions harden; the possibility alone keeps both sides factual.
Timelines and Downtime: Who Carries the Gap
The claim sequence answers whose component failed; the timeline answers who carries the kitchen while it is resolved. Cells and high-voltage power supplies commonly take two to four weeks to replace if they must be shipped, and a busy kitchen cannot run that long without its purification stage. Three contractual tools close the gap. First, a stock commitment: the supplier or its local partner holds the fast-moving spares within a day’s travel, or operates an exchange pool against your serial numbers. Second, a temporary-measure clause: where a defective unit must be returned, the supplier provides a loan unit or a compensated service schedule until the repair lands. Third, defined response times: 24 hours for safety events such as an interlock trip or smoke spilling into the kitchen, 48 hours for odour complaints that neighbours or landlords have raised, and a fixed calendar for planned visits. Without these, the warranty fixes the part at its own pace and the trading loss stays entirely with you.
Retention Money and Milestone Payments
Retention is the buyer’s instrument for making the defects period real. A common structure holds back 5 to 10 percent of the contract sum, released either at the end of the defects period or earlier, upon rectification of the outstanding list. Pair it with a milestone schedule so payment tracks delivered, verified work rather than promises:
| Milestone | Typical share | Verification before payment |
|---|---|---|
| Order confirmation | 10-30% | Order acknowledgement with lead time |
| Materials ready | 20-40% | Photo or video of finished units, serials logged |
| Delivery to site | 20-30% | Delivery note, transit damage check within 48 hours |
| Commissioning and acceptance | 20-30% | Signed acceptance record with baseline readings |
| Retention, released at defects period end | 5-10% | Joint month-11 inspection, snag list closed |
Use retention as a schedule incentive, not as a weapon: release it promptly when the list is closed, and say in the contract that rectification of listed defects triggers partial release. Buyers who hold retention hostage after performance end up paying for it in the next quotation.
Records That Keep the Warranty Alive
Warranties die quietly in filing cabinets. Three record sets decide whether a month-eight claim lands: the maintenance log, kept per visit with dates, tasks and readings; the cleaning certificates, one per professional visit, referencing NFPA 96 or TR19 Grease as applicable; and a change log, recording any modification, any non-original consumable, and any repair by a third party. Each of these is also the documented-servicing condition most whole-unit warranties carry. The practical arrangement is simple: whoever runs the maintenance contract produces the first two, and the site manager appends the third. Ten minutes of filing per visit is what stands between a straightforward claim and a dispute about operating discipline.
The Month-11 Joint Inspection
Do not let the defects period expire by calendar. In month eleven, walk the installation jointly with the supplier or installer: repeat the key acceptance readings, review the snagging list and every claim filed, and list anything outstanding with dates. Close the list before the retention release, and take the opportunity to transition the paperwork into the maintenance contract that follows, so the servicing baseline carries over. An inspection that finds a slow oil weep at the fan bearing in month eleven is a defect; the same weep found in month fourteen is a repair invoice.
What This Means for Different System Types
The playbook is identical across architectures; what changes is the claims inventory.
A ductless all-in-one hood concentrates the warranty into a short list: the ESP cell, the carbon odour stage, the fan and the controls, all inside one enclosure, all verifiable in the kitchen without duct access. That is the appeal of the ductless range hood family Souniny supplies for claim handling: fewer interfaces between trades, and a commissioning baseline that is one document rather than several. Light-duty sites such as cafes and bakeries run the same routine on the N-series at lower intensity; heavy frying menus put the ND-series through the identical checklist with larger treatment stages. Where odour is the dominant complaint, pairing the hood with an Odor Removal Tower moves the carbon stage into its own cabinet, which makes the month-11 inspection of that stage a simple cartridge and seal check.
Where the building supports a full duct run, the ducted ESP purifier range spreads the inventory across plant-room and roof-line items: cells, high-voltage supplies and the centrifugal fan, plus duct integrity, which is why the acceptance baseline for a ducted system should always include duct leakage and deposit readings.
Mobile carts carry the shortest chain of all: the unit is delivered complete, so transit damage is the main month-zero risk, and it should be checked and photographed within 48 hours of arrival. For market pitches and events, the ventless catering cart line makes the whole defects period a two-party affair between the buyer and one supplier.
A Twelve-Point Claims Checklist
Condense this guide into twelve lines and keep it with the commissioning file:
1. Warranty start defined as commissioning and acceptance, with a backstop date. 2. Acceptance record with baseline readings signed at handover. 3. Snagging list attached to the acceptance record, with rectification dates. 4. Defect, wear, misuse and third-party damage classified in writing before the first event. 5. Consumables named: cells, collector plates, sealing strips, insulators. 6. Written notice window known: 14 to 30 days from discovery. 7. Claim file template with serials, photographs, readings and the maintenance log. 8. Acknowledgement within two working days by a named case owner. 9. Remedy path agreed: part, visit or exchange, with freight on the supplier for warranty items. 10. Stock or exchange commitment for cells and power supplies within a day’s travel. 11. Retention 5-10 percent released against the closed snag list at the month-11 joint inspection. 12. Maintenance log, cleaning certificates and change log filed from week one, because they are the condition of the cover.
Run the defects period like a project with four deliverables: a baseline, a log, a ladder and an exit inspection. The equipment will almost certainly behave; the paperwork is what decides whether, when it does not, the year costs you a folder or a fight.
