Replacement Filters for Blowtherm Spray Booths
Blowtherm builds high-performance downdraft and semi-downdraft booths used in collision, refinish, and industrial finishing. Their tight airflow tolerances are part of what makes them deliver clean results — and exactly why filter condition matters so much. As ceiling media loads, air velocity and uniformity fall and dirt starts showing up in the finish; as exhaust filters clog, extraction drops and booth pressure climbs. Fresh, correctly sized filters keep a Blowtherm booth performing to spec.
We stock replacement filters for Blowtherm booths and ship most orders the same business day. Browse the Blowtherm filter collection or use Find My Filter to match parts to your exact booth.
Which Filters Fit a Blowtherm Booth
A complete Blowtherm filter set generally covers:
- Ceiling (intake) filters — diffusion media supplying clean, even air to the spray zone; the main driver of finish quality.
- Exhaust / floor filters — paint-arrestor media that captures overspray before air leaves the booth.
- Prep-station and intake filters — depending on your Blowtherm configuration.
Sizes vary by model and install year, so confirm your frame openings before ordering. See confirmed-fit options in the Blowtherm collection, or send us your dimensions and we'll match them.
When to Change Blowtherm Filters
Intervals depend on volume and coatings, but as a general guide:
- Ceiling filters: every 3–6 months, or sooner if finish quality drops or air balance shifts.
- Exhaust filters: change on differential pressure — when the manometer hits the manufacturer's limit, typically every few weeks to a couple of months under steady production.
Monitor pressure drop instead of the calendar. Rising static pressure means the filters are loaded. Stocking spares means you never spray through a clogged set.
Custom-Cut Ceiling Filters for Blowtherm
If your Blowtherm plenum needs a non-standard size, our Custom-Cut Ceiling Filter Blanket is made to your exact dimensions — an exact fit with no gaps for overspray bypass. It's the cleanest way to fit older or modified booths, and it ships fast.
Compliance Note
Per EPA 40 CFR Part 63 Subpart HHHHHH ("NESHAP 6H"), spray booths must use filter technology demonstrated to capture at least 98% of paint overspray, with filter-efficiency documentation kept on file. NFPA 33 (§5.1.1.2) requires intake filters in wall/ceiling assemblies to be UL 900 listed. Match filters to your booth manufacturer's specifications and your local Authority Having Jurisdiction. This information is general guidance only and is not legal advice — code editions and AHJ requirements vary.
Why Buy Your Blowtherm Filters From Us
- Same-day shipping on most in-stock filters.
- Custom-cut sizing for any plenum or frame.
- Technician-backed — we service spray booths in the field and know what fits and lasts.
Ready to reorder? Shop the Blowtherm filter collection, match parts with Find My Filter, or call 800-381-0149 (Mon–Fri, 8am–4pm MST) and we'll confirm the exact filters for your Blowtherm.