Most cabinet and furniture shops do not start out wanting a spray booth. They start out wanting a finish that comes off the rack smooth — no nibs, no dust specks, no dry-spray blotches — and they discover that the shop corner they have been spraying in cannot deliver it. This page covers what an inflatable booth has to do for that work, how to size it to your panels and furniture, and the airflow maths that decides whether the finish is clean or a rework.
Why a shop corner stops working
The problem is two contaminant streams, not one. Overspray from the gun drifts and lands on the wet surface and on everything else in the room. Shop dust from saws, sanders and edge-banders stays airborne and settles into the finish while it flows out. In an open corner both end up on the workpiece, and neither clears because there is no controlled path for air.
A spray booth fixes both by enclosing the work and giving the air somewhere to go: filtered air in, filtered air out, at a rate fast enough to carry the overspray away before it settles. For wood finishing that also means keeping the intake clean, because a booth that pulls shop air in through an unfiltered gap simply relocates the dust problem inside the enclosure.
What has to fit: sizing by workpiece
Size on the interior clearance you need, then step up to the next stock size — the shell, its taper and the inflation tubes mean usable interior space is smaller than the external footprint. A practical rule for finishing is 3–4 ft of clear spray distance on the working side and enough floor for a rack or turntable.
| Job type | Typical workpiece | Interior to aim for | Stock size | Volume |
|---|---|---|---|---|
| Doors / parts, one at a time | Cabinet door up to ~24×36 in | ~10×6×7 ft | 13×8×8 ft | 832 ft³ |
| Batch doors + panels on a rack | Rack ~6 ft wide | ~14×8×8 ft | 20×10×9 ft | 1,800 ft³ |
| Assembled cabinets, several | 36×24×90 in carcass | ~18×10×9 ft | 20×13×8.5 ft | 2,210 ft³ |
| Full kitchen run / large furniture | Table or sofa up to ~96 in | ~24×13×10 ft | 26×15×10 ft | 3,900 ft³ |
| Multiple pieces + staging / drying | Set of furniture | ~28×18×12 ft | 30×20×13 ft | 7,800 ft³ |
Send the longest and tallest piece you spray on the custom enquiry form — door, table or sofa — and engineering will confirm the smallest booth that clears it with working room.
Airflow is what decides the finish, not the fabric
Two booths of the same size can produce very different finishes, and the difference is air changes per hour (ACH) — how many times the full booth volume is replaced per hour. The sizing rule is:
required CFM = booth volume (ft³) × ACH ÷ 60
- 60 ACH — general finishing, waterborne and pigmented lacquers.
- 90 ACH — solvent-heavy base/clear and fast-drying systems.
- Add 30–50% for filter loading, because a loaded filter passes less air than a clean one.
Worked example: a 20×10×9 ft booth is 1,800 ft³. At 60 ACH that is 1,800 × 60 ÷ 60 = 1,800 CFM; at 90 ACH it is 2,700 CFM. That is the number your exhaust has to move, which is why an inflation blower alone does not clear overspray — it holds the shell up, it does not evacuate the booth.
Material choice for a finishing shop
The shell material sets how the booth handles light, moisture and repeated use. For cabinet and furniture work, most shops land on one of three:
| Material | Best for | Trade-off |
|---|---|---|
| 210D Oxford | Light, occasional finishing; doors and small batches | Lightest and lowest cost; needs care with abrasion and UV |
| 420D Oxford | Regular production; reinforced corners and seams | Heavier and more durable; the usual pick for working shops |
| PVC | Airtight/watertight shells; high-humidity or outdoor use | Heaviest; best airflow sealing, coolest to buy |
For waterborne finishes, a shell that holds its pressure is what keeps the intake air filtered and the dust out; a floppy shell leaks shop air at every seam and undoes the filtration. That is the argument for PVC or a well-maintained 420D shell in a production shop, not for any single colour or count.
What to check before you order
- Interior, not exterior. Confirm the internal clearance clears your tallest and longest piece plus working room.
- Exhaust sized to the volume. Match the exhaust to the CFM figure for your booth size and the finish you spray — not to the inflation blower.
- Filtration on both sides. Filtered intake (MERV 8–10) and filtered exhaust (MERV 13–15), with carbon for solvent work.
- Floor and access. A rack or turntable needs clearance; a booth you can walk into and turn in matters more than a few extra feet of length.
- Cure-in-place. If you leave parts to dry in the booth, check that it can stay up for a full shift without attention.
- Service. Filters and blowers are the wear items; confirm replacements and a warranty are available. Every Sewinfla booth ships with a 1-year warranty and US-stock spares.
Frequently asked questions
What size spray booth does a cabinet shop need?
It depends on how many doors and panels you finish at once. For doors sprayed one or two at a time, a 13×8×8 ft booth (832 ft³) is the entry size. For a rack of doors plus a few assembled carcasses, plan on 20×10×9 ft. Shops finishing a full kitchen run or large furniture in a batch generally work out of a 26×15×10 ft booth or larger. Size on the interior clearance you need (see the sizing table above), not the external footprint.
Can I spray cabinet doors in an inflatable booth?
Yes — flat panels and doors are one of the best fits for an inflatable booth because the work is light, low-volume and often staged on a rack. Lay doors flat on a turntable or hang them on a vertical rack, keep 3–4 ft of clearance on the spray side, and the booth handles the overspray and dust that a shop corner cannot.
Do I need a downdraft booth, or is an inflatable booth good enough for furniture finishing?
For lacquer, waterborne and pigmented finishes on wood, an inflatable booth with a real Airflow path — filtered intake, sized exhaust, adequate air changes — gives a clean finish. A fixed downdraft booth removes overspray more uniformly and suits high-volume, high-gloss production. The decision is volume and finish spec, not the booth material: size the airflow to 60 air changes per hour for general finishing and 90 for solvent-heavy work, then add 30–50% for filter loading.
How do I keep dust out of the finish?
Three things matter more than the booth itself: filtered intake air (MERV 8–10), a sealed positive-pressure shell so the only air entering is filtered, and a clean floor inside. Negative pressure pulls shop dust in through every seam; a correctly inflated booth is pressurised outward, so dust stays out. Ground cover and a tack cloth on the workpiece close the remaining gap.
Can the booth stay up while finishes cure, or do I pack it down?
Many shops leave an inflatable booth standing for the duration of a job and only deflate it at the end — that keeps the cured part in the same clean, still air it was sprayed in. Deflation and packing take 15–20 minutes, so a booth can also be struck between jobs if floor space is tight.
Can I get custom sizes, colours or a logo on the booth?
Yes. Stock sizes cover most cabinet and furniture work, and custom builds run from small parts booths up to 90×25×21 ft with your own dimensions, colours and printed logo. Submit your panel sizes and throughput on the custom enquiry form and engineering will reply with a sized recommendation.
Finish doors and furniture in a booth built for the work
Stock sizes from the 13×8×8 ft parts booth to the 33×16.5×11.5 ft production booth, plus custom builds to your own dimensions and colours — US-engineered, US-stock.
Browse Booth Sizes Request a Custom QuoteKeep reading
- Inflatable paint booth size guide — the interactive size and volume calculator
- How to choose a booth size — the six-step sizing process
- CFM calculator and blower sizing — the airflow maths with the filter derate
- Ventilation design — positive-pressure booths vs fixed downdraft booths
- Why booths fog up, and how to fix it — air changes per hour in practice
- Material comparison — 210D Oxford vs 420D Oxford vs PVC
- Garage and small-shop setup — keeping a booth clean in a working space
- Booth maintenance — keeping the shell, blowers and filters serviceable