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Nov 3, 2026

Kitchen Exhaust Contracts: Delay, Programme and Liquidated Damages

How to write delivery, liquidated damages and extension of time clauses for kitchen exhaust contracts: trigger dates, programme evidence, rate design, caps, notice periods and the records that decide a delay claim.

Kitchen Exhaust Contracts: Delay, Programme and Liquidated Damages

A delivery date on its own protects nobody. It becomes a remedy only when four instruments lock together: a dated programme with named owners, a defined trigger event, a damages rate a court will actually enforce, and a mechanism for extending time when the delay is not the supplier’s fault. Drop any one of the four and the other three fail quietly, usually at the exact moment a fit-out is three weeks late and the doors are already painted.

The Date Is Not the Obligation

“Delivery in eight weeks” is not a term until you know eight weeks from what. In kitchen ventilation contracts the same sentence can mean five different things, and each one shifts risk to a different party.

Trigger event What it actually protects Where it breaks
Purchase order date The supplier’s factory slot is fixed early Punishes the buyer for slow drawing approval; the supplier can sit on an unapproved drawing and still be “on time”
Deposit received Aligns cash and production start Gives the buyer a lever it does not need and the supplier a defence it should not have; a bank transfer delayed two days moves the whole programme
Drawings approved The most honest start point for custom hoods and duct layouts Approval can bounce three times on comments; the clock must restart only on closed comments, not on the first return
Ready for dispatch Separates manufacturing from freight Whoever books the container owns the freight risk; a rolled booking is invisible in this definition
Arrival on site Matches the buyer’s real need Depends on site access, hoisting and a clear unloading bay that the buyer often cannot guarantee

The usable version is a dual trigger, not a single one: delivery to site within X weeks of the later of deposit received and drawings approved, with comments closed. That formula is fair to both sides, and it has a second virtue that matters more than fairness, which is that it can be proved. Either the approval email exists or it does not.

Whatever trigger you choose, the contract needs three separate dates, because they carry three different consequences: delivery to site, mechanical completion, and acceptance. Contracts that collapse all three into “delivery” end up arguing about whether a hood in a crate counts as delivered.

A Programme You Can Measure, Not a Picture

A programme is not a bar chart with coloured arrows. It is a list of dated obligations, each with an owner, so that a week later you can point at a line and say whether it happened. Ask for the list before you sign, and check that it includes the buyer’s lines as well as the supplier’s.

No. Programme line Owner Typical duration
1 Site survey and duct route confirmation Supplier with buyer access 2-5 working days
2 Manufacturing drawings issued for approval Supplier 5-10 working days
3 Drawings returned, comments closed Buyer and consultant 5-10 working days per cycle
4 Long-lead items ordered (fans, cells, power supplies, controls) Supplier Same day as approval
5 Factory assembly and internal test Supplier 20-45 working days
6 Pre-shipment inspection and packing Supplier, buyer may attend 2-3 working days
7 Booking, loading, sailing Whoever holds the Incoterm 5-10 working days to sail
8 Freight and clearance Freight forwarder See lane table below
9 Site offload, positioning, hoisting Buyer or installer 1-3 working days
10 Installation, duct connection, electrical final Installer 2-10 working days
11 Balancing, commissioning, acceptance test Supplier and commissioning agent 1-3 working days

Two questions expose a programme drawn to look good rather than to be run. How much float sits on the critical path, and which line moves first if the buyer is a week late with approvals? A programme with zero float against a date the buyer chose is already late on the day it is signed.

Freight is the part buyers underestimate. Typical sea transit runs 30-40 days to northern Europe, 14-20 to the United States west coast, 20-25 to the Gulf, and 7-14 within Southeast Asia, with 3-10 days of clearance and 2-7 days of inland movement on top. A straightforward imported kitchen therefore lands at 70-110 days end to end; custom stainless or a non-standard voltage runs 100-140. Those numbers belong in the contract as a duration, not as a hope.

The Buyer Is Usually the Cause

In fitted kitchens the majority of delay originates on the client side, and it is almost never malicious. The ceiling grid is not finished, the isolator has no supply, the structural opening moved 200 mm, the drawing approval sat in an inbox for nine days, or access is restricted to the hours after service. Every one of these is a legitimate reason for the supplier to claim time, and every one of them is fatal to a damages clause that was written as if only the factory could be late.

The fix is not a tougher clause. It is a buyer obligations register attached to the same programme, with the same dating discipline, so that both sides are measured by the same calendar.

Buyer obligation Deadline relative to programme Consequence if missed
Site access for survey, with safe working at height Week 0 Drawing issue slips one-for-one
Drawing approval and closed comments Week 2 Production start slips; supplier claims extension
Confirmation of voltage, frequency and phase Before long-lead order Rebuild or transformer; 3-6 weeks lost
Structural support and roof or wall penetration ready 2 weeks before arrival Equipment cannot be positioned; storage and re-handling cost
Electrical supply, isolator and interlock wiring terminated Arrival week No power-up; commissioning crew stands down
Make-up air path available and controllable Commissioning week Capture test fails for reasons unrelated to the equipment
Ceiling grid, finishes and floor protection complete Before install Installer returns; second mobilisation charged
Gas or fuel interlock interface defined and wired Before commissioning Fire strategy cannot be demonstrated
Access window and lift or hoist booking Arrival week Standing time at full day rate
Nominated decision-maker available on site Throughout Every ambiguity becomes a variation later

This table is not a concession to the supplier. It is what makes the damages clause believable. A supplier asked to accept delay damages with no buyer obligations register will price the undefined risk into the quotation as two to four weeks of programme contingency, and the buyer pays for a delay that may never happen.

Designing a Damages Rate That Survives a Dispute

Liquidated damages are a pre-agreed estimate of the loss a late handover causes. In common-law jurisdictions they are enforceable when they are a genuine pre-estimate made at contract date, and unenforceable when they are extravagant or unconscionable, which is the penalty test. In many civil-law jurisdictions a court may reduce a rate it considers excessive even where both parties signed willingly. Either way the drafting logic is the same: a rate you can justify line by line is worth more than a rate that sounds tough.

Four design decisions carry almost all of the value.

Per week, not per day. A commercial kitchen loses trade in weekly blocks: bookings, rota, supplier cycles, marketing. A weekly rate also stops the arithmetic from becoming a daily argument about whether Saturday counts.

Rate and cap as a pair. Rates commonly sit between 0.4 and 1.0 percent of contract value per week, with caps between 5 and 10 percent. An uncapped damages clause is effectively uninsurable for the supplier, so it usually means a higher price or a signature that will be disputed later.

The cap must trigger something. A cap with no consequence is a ceiling on the buyer’s remedy and nothing else. Attach a long-stop date: once the cap is reached, or once a stated number of weeks has passed, the buyer may terminate the affected scope and complete it elsewhere, recovering the difference in cost. That right, not the rate, is what changes supplier behaviour.

Name it correctly. Call it delay damages or liquidated damages, never a penalty. In several jurisdictions the label alone influences whether a court treats the clause as an estimate or as a punishment.

Now the part buyers skip: what the rate is supposed to compensate. Build the schedule at tender stage, using your own numbers, because this is the evidence that makes the rate defensible if it is ever tested.

Heads of loss to pre-estimate How to derive it before signing
Lost trading contribution Forecast covers per week x average spend x contribution margin, for the weeks between planned and realistic opening
Temporary extraction or hire equipment Weekly hire rate plus delivery and collection for the gap period
Extended site supervision and standing time Site manager day rate x expected overrun, plus contractor preliminaries
Extended rent, service charge and insurance Weekly property cost for the period the unit cannot trade
Second mobilisation of installer and commissioning crew Return visit cost, normally 2-4 days including travel
Storage, re-handling and protection of delayed equipment Weekly storage plus a crane or hoist re-booking
Extended financing or fit-out loan interest Weekly interest on the drawn balance

Add the heads up, divide by contract value, and you have your own implied weekly rate. It is common for the resulting figure to sit above 1 percent, which tells you something useful: a 0.5 percent clause is not a remedy, it is a discount. The correct response is not to demand 3 percent, because the supplier will refuse or reprice. The correct response is to shorten the programme, split the delivery into sections, or negotiate a higher cap on the long-stop.

One arithmetic check is worth doing on a napkin, entirely in percentages. Take a contract where damages accrue at 0.5 percent per week with an 8 percent cap. The cap is reached at week 16. If the actual overrun runs to 22 weeks, the last six weeks earn nothing at all, and the buyer’s only remaining lever is the termination right. If that right is missing, the clause has quietly expired at exactly the point where the loss is worst.

Extension of Time: The Clause That Decides Everything

An extension of time provision is not a favour granted to the supplier. It is the boundary of the damages obligation, and it is the clause that decides whether the rate is ever paid. Without a closed list of excusable events, every delay becomes a negotiation, and the supplier’s fallback position is always “buyer-caused”.

Event Time? Money? Evidence required
Buyer’s late approval or late instructions Yes Yes Dated submission and return log
Site not available or access withdrawn Yes Yes Site diary, photographs, access emails
Utilities, isolator or structure not ready Yes Yes Commissioning record, electrician sign-off
Variation to layout, capacity or finish Yes Yes Written instruction and impact statement
Defined force majeure event Yes Usually no Named event, official notice, duration
Port, customs or statutory hold with documentation Yes Usually no Carrier and authority notices
Supplier’s own subcontractor or material failure No No Supplier’s commercial risk
Supplier’s labour shortage in peak season No No Supplier’s commercial risk
Buyer-caused and supplier-caused delay overlapping Yes Usually no Programme analysis showing concurrency

Notice periods are where buyers win or lose without noticing. A workable regime is 14 days from awareness for a first notice with an outline impact, a monthly update while the event continues, and a final claim within 28 days of it ending. Many contracts make a missed notice fatal to the claim, which is a strong buyer protection, provided the buyer applies it consistently. A buyer who waives notice once has taught the supplier that the regime is decorative.

Add a mitigation duty in plain language: the supplier must show a recovery plan within 10 working days, whether a second shift, a split shipment or air freight for the two components blocking commissioning. Buyers rarely ask what mitigation is already priced into the contingency, and the answer is usually nothing.

Three Words That Are Not Synonyms

Delay, disruption and suspension are used interchangeably in kitchen fit-out meetings and they carry completely different remedies. Getting the label wrong is how buyers end up paying costs instead of receiving damages.

Term What it describes Remedy it triggers
Delay Completion later than the contractual date, for a reason within the supplier’s control Liquidated damages at the agreed rate, subject to the cap
Disruption Productivity lost because of repeated changes, resequencing or out-of-order access Cost claim, usually on a quantum basis; time only if completion is affected
Suspension Buyer instructs work to stop, or site is closed by others Extension of time plus cost plus, in some contracts, a right to terminate after a stated period

A supplier hit by fourteen design changes has a disruption claim, not a delay. A buyer who applies damages to that situation will lose at adjudication and pay the costs of the argument, which is why a dated change log matters more than the wording of the rate.

Delivered, Installed, Accepted: Three Dates, Three Consequences

Attach the damages to the date that matters to your business, which is normally acceptance, and then make acceptance testable. A clause that says acceptance happens when the buyer is satisfied will never trigger, because satisfaction is not a measurement. A clause that says acceptance happens when measured airflow is within plus or minus 10 percent of design duty, capture is demonstrated by smoke pencil at the hood face, noise is within the stated limit at one metre with background correction applied, and the electrostatic cell draws its design current and voltage, will trigger the same afternoon.

Sectional completion is the most underused tool in the whole contract. If six of eight hoods are ready, take them into possession with a proportionate reduction in the damages rate and a proportionate share of the cap. The administrative effort is small and the reduction in exposure is usually worth more than the argument about the last two units.

The Paperwork That Decides the Dispute

Delay disputes are not won by the better clause. They are won by the party holding dated records. Six documents do almost all of the work: the signed baseline programme, weekly one-page progress reports, an instruction and change log, the buyer obligation log, delivery notes with times and condition, and the commissioning record with measured values.

The waiver traps are worth memorising, because each one is signed by someone helpful in a hurry. A delivery note marked “in good order” without a shortage record converts a claim into a favour. Accepting a partial delivery without a written reservation can be read as agreement to revised completion. Paying an invoice late without a reservation can be argued as acceptance of the delay. Long silence, in many jurisdictions, is treated as waiver, which is why a buyer who intends to claim must write early and often.

Check whether the contract says time is of the essence. If it does, late delivery can support termination. If it does not, the buyer must normally serve a notice to complete giving a reasonable period, and only then treat continued failure as repudiatory.

What to Trade in the Negotiation

Every clause on this list has a price. Knowing which concessions are cheap makes the negotiation shorter.

What the buyer wants What it costs the supplier Trade that closes it
Dual trigger date with closed comments Low, if approvals are actually fast Accept a 5-day grace at the start of production
Damages at 0.5-0.75 percent per week Moderate; requires programme discipline Cap at 8 percent rather than 12
Termination right at the cap High in theory, rare in practice Restrict it to the affected scope, not the whole order
Acceptance-linked completion Low if criteria are measurable Publish the test method in the contract annex
Sectional completion with pro-rata damages Low; helps the supplier too Agree the section split before manufacture
14-day notice with evidence Low; it is administrative Accept monthly joint programme reviews
Exclusion of consequential loss This is what the supplier actually needs Grant it in exchange for a real rate and cap

Red flags that should stop a signature: a damages clause with no cap; a delivery date “subject to factory scheduling”, which is not a date; an extension of time for “any cause whatsoever beyond the supplier’s control”; damages waived if any payment is one day late; and acceptance defined by the buyer’s satisfaction rather than by a measurement.

Where the Schedule Actually Breaks

Clauses are written in offices; delay happens in factories and loading bays. Five failure points account for most late kitchen ventilation packages.

Long-lead components. Custom centrifugal fans, electrostatic cells and their high-voltage power supplies, control and interlock modules, and certified fire dampers all carry their own lead time, and they are ordered after drawing approval, not before. Ask for the long-lead list with weeks-at-order and confirm the order date in writing.

Sequencing errors around commissioning. Sending the hoods first and the fan last looks efficient on freight and is a disaster on site, because commissioning cannot start. Group the components that must arrive together, and let everything else follow.

Site readiness. Ceiling grid, structural support, isolator, gas interlock, make-up air path. When these are missing the equipment sits wrapped, the damages clock runs against the supplier, and the supplier serves an extension notice the same week. Both sides lose, and the argument always costs more than the delay.

Approval cycles treated as a formality. Three review rounds on a hood drawing is normal; three rounds of nine days each is three weeks of programme, invisible until you total it. A review schedule with named reviewers and a 5-day turnaround is worth more than a tougher damages rate.

How Architecture Changes the Programme

Buyers spend weeks negotiating a damages rate and almost no time on the single decision that determines whether delay is likely: what the system is made of. A solution that ships as a tested assembly removes whole trades from the critical path. In the ductless range hood family, for instance, the capture canopy, the electrostatic stage and the carbon odour stage arrive in one cabinet, so there is no duct fabrication, no fire-rated penetration, no balancing subcontract and no coordination with the building’s structural engineer. Installation and commissioning compress into one to two days per unit, and the buyer obligations register shrinks to power, access and a clear discharge path.

Where the building already has a route to the roof, the ducted ESP purifier range plus a matched centrifugal fan is the higher-volume answer, and the price of that capability is a longer programme: duct fabrication, penetration and fire stopping, then balancing before acceptance can be measured. That is not a defect in the product, it is a property of ducted work, and it belongs in the programme as three separate lines rather than one.

Where the cookline moves at all, the mobile food carts range covers units that arrive assembled, are connected at the pitch and are commissioned in under an hour, which is the only architecture that survives an event calendar. What all three have in common is that the schedule is decided by interfaces, not by the factory. Fewer interfaces means fewer excuses and a damages clause that can actually be enforced.

Ten Questions Before You Sign

1. What exactly starts the clock, and is that event provable from a document I control?

2. Are there three dates in the contract, or only one?

3. Does the programme show float, and who owns each line?

4. Is there a buyer obligations register with dated deadlines and named owners?

5. What is the damages rate per week, what is the cap, and what happens when the cap is reached?

6. Is acceptance defined by measurement, and is the test method attached?

7. What is the EOT notice period, and does a missed notice bar the claim?

8. Can I take sectional completion with pro-rata damages, and what is the long-lead list?

A programme that answers all ten is not a stricter contract. It is a contract where the dates mean something, which is the only thing a damages clause was ever supposed to deliver. In our own range the light-fume work is covered by the N-series all-in-one units and the heavy frying and wok work by the ND-series, with an Odor Removal Tower where the discharge point sits close to a neighbour’s window; the schedule implications differ far more between those two architectures than between two suppliers selling the same architecture.

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SOUNINY Application Engineering Team
SOUNINY Application Engineering Team
Commercial Kitchen Ventilation Specialists

A multidisciplinary team of application engineers and kitchen-ventilation specialists at Shenzhen Shuangni Environmental Technology Co., Ltd. (SOUNINY). We design, test and deploy grease, smoke and odor-control systems for restaurants, hotels, food factories and ghost kitchens across 30+ countries, and author the technical guidance published on this site.

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FAQ

Frequently Asked Questions

Should liquidated damages be calculated per day or per week?
Per week suits kitchen projects better. Trade is lost in weekly blocks through bookings, rotas and supplier cycles, and a weekly rate removes the argument about whether a Saturday counts. A typical band is 0.4 to 1.0 percent of contract value per week, with a cap between 5 and 10 percent.
What happens once the damages cap is reached?
Nothing, unless the contract gives the buyer a further right. A cap with no consequence becomes a ceiling on the remedy rather than a lever on behaviour. Attach a long-stop: once the cap is reached, the buyer may terminate the affected scope and complete it elsewhere, recovering the difference in cost.
Can a supplier claim extra time for a late drawing approval?
Yes, if the programme lists approval as a buyer obligation with a date and the supplier serves notice within the contractual period. That is why a buyer obligations register matters as much as the damages clause: an undefined buyer-side delay makes the damages rate unenforceable in practice and gets priced in as programme contingency.

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