Do you supply the ductwork and exhaust fans as well?
No. Our package is the hood, its filtration and the calculations. Ductwork from the hood spigot onwards, the exhaust fan, make-up air units and any pollution control unit are the MEP contractor’s scope. We give them the extract volume and heat load to size against, and we will coordinate with them, but the mechanical installation above the hood is not ours.
What calculations do you issue for the MEP submission?
An extract and make-up air calculation on one sheet, a heat dissipation schedule, and a specification sheet for every item. They are built from the equipment schedule, so the cook line has to be settled by make and model before they can be finalised.
Is hood fire suppression included?
It can be, where you ask us to carry it. The installation itself is always done by a DCD-licensed fire suppression contractor, because only they can issue the certificate the authority requires. Whether that sits in our package or the main contractor’s is a commercial decision, not a technical one. Either way the hood is built to accept the system, so the pipework and nozzle positions are coordinated before fabrication.
How is the hood size decided?
By the equipment underneath it, not by the wall it is going on. The duty of each appliance, the overhang it needs and the filtration the project calls for all feed into it. A hood drawn to fill the available wall is the most common reason a kitchen submission comes back.
Our landlord has named an approved hood manufacturer. Can you work with that?
Yes. Where a brand is specified we supply to it. Where the make is left open we fabricate to the performance required. It is worth establishing which situation you are in before the hood is priced, because a named manufacturer can change the figure considerably.
Can you supply a hood for a kitchen another contractor is fitting out?
Yes, and we do it regularly as a trade package for main contractors and fit-out contractors. We need the equipment schedule for the line, the ceiling height and the duct position. If the issued design will not pass review, we say so before anything is made.
What about a tandoor, or a charcoal grill?
Both need a different answer from a standard canopy. A tandoor usually takes a round hood built to suit it. Charcoal and other solid fuel is a heavy, continuous duty where a water-mist hood is often the sensible route, because it knocks grease out before it reaches the duct.