Galaxy Nickel Duct Cover Cabinets

A duct cover is finished trim, usually telescoping, that encloses the run of pipe between the top of a hood canopy and the ceiling. It is a single listing in this finish — GNK RHBB DCT at $263.25 — and it shares the RHBB stem with the blowers and the filter, which is to say it belongs to the parts family rather than to any one shell.

What it is not: it is not structural, it does not carry the hood, it does not touch the duct itself and it moves no air whatsoever. Take it away and the hood works identically. It exists for exactly one reason, which is that a length of spiral pipe running up a finished wall looks like an unfinished building site, and this is the part that stops that.

It is also, on a painted finish, a surprisingly demanding piece of the room. It is a narrow flat plane at the highest point of the wall, lit from below by the hood’s own lights and from above by whatever is on the ceiling, and any twist or gap between it and an out-of-level ceiling is visible from anywhere in the room. A mid-tone grey is honest about that: it holds a shadow line cleanly where a bright white would wash it out. That is flattering when the ceiling is true and merciless when it is not, so the ceiling at the range wall is worth checking with a level before anybody orders trim to die into it.

Work from the floor up and stop when you hit the ceiling. Every one of these numbers is available before the order goes in, and three of the four come off spec sheets rather than out of your head.

1. Finished floor to finished ceiling, measured at the range wall, after flooring. Not at the doorway, not from the drawings — houses settle, and this is the number the cover has to reach.
2. Floor to cooking surface. On a standard freestanding range this lands around 36″, but it comes off the appliance spec sheet, and a slide-in over a base cabinet or a professional range on adjustable legs may not.
3. The mounting gap you are going to use — the clear distance from the cooking surface to the bottom of the canopy. The parent hood page explains how that window is set; the hood’s own installation instructions and your local code govern it, and a gas range will state a minimum.
4. The height of the hood body itself, off the manufacturer’s drawing for the exact shell. Our listings do not publish it, and it differs between the plain, chimney, slim, designer and glass shapes.

Ceiling height, minus cooking surface height, minus mounting gap, minus body height, is the gap the cover has to fill. Everything but the last two is fixed by the room and the range, which is why the same hood needs a different answer in different houses.

Substitute your own numbers rather than borrowing these. What holds regardless of the inputs is the rate of change: each extra foot of ceiling adds a full twelve inches for this part to cover, and there is no version of this arithmetic in which the hood model changes the answer.

There is a single duct cover in this finish at $263.25, and the listing does not state its telescoping range, its width, or which shells it is designed to sit on. That is not unusual for a trim part, and it is not a problem on an eight- or nine-foot ceiling. It is a problem on ten feet, on a vaulted ceiling, and anywhere a beam changes the effective height.

So three questions, asked once, before the order: what vertical range does this cover actually adjust through; is there a taller version or an extension available as a separate part; and does it match the shell you have chosen, including the wood tone if you are ordering Timber or Walnut. That last one catches people out — a painted cover above a Walnut canopy is a mistake you see immediately, and it is not one that gets fixed cheaply after the fact.

The failure mode here is undramatic and permanent. The hood works, the kitchen is finished, and there is a foot of bare pipe above the canopy that nobody can do anything about without opening the ceiling. Ten minutes of asking is the whole preventative.

The space the cover encloses is not empty, and the other things in it have to be resolved before anybody closes the wall. There are three, and all three are cheap to get right at framing and expensive to get right afterwards.

The duct is the obvious one: it has to leave the top of the hood, clear whatever is above it, and get to the outside, and the cover only hides it if it stays inside the cover’s footprint. A duct that bulges out past the trim because it had to jog around a stud is a duct that no amount of trim will conceal. The second is blocking. A wood hood is heavy, heavier still once a blower is inside it, and it wants solid backing in the wall rather than drywall anchors — that is framing work, decided from the hood’s mounting drawing, and it is the single most common thing left out of a rough-in. The third is power. The hood needs a circuit, and where that cable emerges matters, because a receptacle or a junction box sitting in the middle of the covered zone is either a problem or a nuisance depending on how much room there is behind the trim.

All three point at the same practical instruction: the hood’s installation drawing should be in the hands of the framer and the electrician before the walls are closed, not handed to the cabinet installer on delivery day. It costs nothing to send and it prevents the entire category of problem that ends with somebody cutting into finished tile.

This is a $263.25 part that a good number of kitchens do not need, and nobody selling hoods is going to volunteer that.

• A standard eight-foot ceiling with a tall shell. Run the subtraction — there may be only a few inches between the top of the canopy and the ceiling, in which case the cover is trim over almost nothing and the joint at the top of the hood is better closed with a scribe or a piece of moulding from the decorative range.
• A bridge cabinet above the hood. If the plan puts a short wall cabinet over the canopy — the arrangement the 10x10 package on this finish uses, with a 12″ upper over the range — the duct is concealed inside or behind that cabinet and the cover has nothing to do.
• A soffit or a bulkhead. A framed and finished soffit above the range wall brings the effective ceiling down to the hood, which is also the standard fix when a stack cannot reach a ten-foot ceiling. It costs carpentry rather than cabinetry and it resolves the duct at the same time.

What we would not do is skip the cover on a nine- or ten-foot ceiling to save the money and plan to "deal with it later". Later means either a piece of site-built trim that does not match the factory finish, or living with the pipe. Order it with the hood, or design the gap out with one of the three answers above — but decide, rather than defaulting.