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Rohner · Side-downdraft

Rohner Rohner Side Downdraft

Filter kit, alternatives, and current pricing for the Rohner Side Downdraft.

Rohner model • Rohner Side Downdraft

Rohner Rohner Side Downdraft Filter Fitments

Rohner's Side Downdraft positioning is the engineering-driven choice for industrial-finishing operations where ceiling-down airflow is required for finish quality but a floor-pit excavation is structurally infeasible or operationally undesirable. The exhaust extracts through low side-wall banks rather than a floor pit, which preserves the downdraft-style airflow pattern without the construction commitment. Each installation has its own engineering documentation describing the ceiling panel layout, the side-wall exhaust bank dimensions, the AMU air-handling spec, and the capture-efficiency rating. Fitment requires the customer's project documentation.

Quick answer

The Rohner Side Downdraft is an engineered-per-project industrial side-downdraft booth, Rohner does not ship a single standardized side-downdraft SKU but rather builds each side-downdraft installation to the customer's coating specification, footprint, and capture-efficiency requirement. Side-downdraft uses ceiling intake combined with low side-wall exhaust extract, the airflow sweeps down and outward to the side rather than straight down into a floor pit. Source confidence on this fitment is authorized-dealer cross-reference, kit ships with quote-back form to upgrade to field-verified before subscription auto-renews. Variation across Rohner installations is high, so the quote-back form on the Side Downdraft is stronger than typical.

By Ben Kurtz · Filter Fitment Lead, 20+ years in paint-booth service · Updated May 9, 2026
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How Rohner Side Downdraft shops choose filters

Intake side. Ceiling-plenum diffusion intake using polyester or fiberglass diffusion media in the panel grid. Side-downdraft configurations typically use full-area ceiling coverage (similar to full downdraft) to drive the downward airflow pattern; exact panel dimensions and grid layout vary per build. The Rohner engineering documentation that shipped with the original install is the canonical reference; absent that, the Filter Finder photo set plus measurements drives the fitment match.

Exhaust side. Low side-wall exhaust banks with arrestor pad media, typically two side-wall positions running the length of the booth at low elevation, drawing the airflow outward and down. Fiberglass-arrestor pad is common across Rohner side-downdraft installations; polyester-arrestor or pocketed-paper as upgrades for specialty coatings. The new 25-entry filter media taxonomy on this site distinguishes 12 exhaust types, fiberglass-arrestor, polyester-arrestor, accordion-paper, paper-mesh, pocketed-paper, cube-overspray-arrestor, tower-exhaust-pocket-bag, plus five more, alongside 9 intake types and 4 specialty types. The Side Downdraft kit names its specific exhaust slug per side-wall position only after field-verification confirms the dimensions; the base fitment ships the published-spec defaults with the quote-back upgrade path.

Slot expectations queued for re-mapping. The booth-model slot expectations row for the Rohner Side Downdraft is currently flagged in our verification queue as pending re-mapping against the new 25-entry media taxonomy (the platform expanded from 9 to 25 media types on 2026-05-09). The kit you receive is correct relative to the published-spec base, we're updating the metadata record, not the physical fitment.

Cycle math. Cycle cadence is engineering-spec-driven rather than catalog default. Side-downdraft side-wall exhaust pads often see asymmetric loading depending on the operator's spray-pattern habits and part placement, which can produce different cycle rates between the two side-wall positions. Subscription cadences tune per-installation per-position from delivery confirmations and quote-back paste-backs.

Regulatory landscape

Rohner Side Downdraft installations are typically industrial-finishing operations where regulatory exposure runs through the customer's engineering-specification documentation as well as federal NESHAP applicability for the coating type. Federal OSHA spray-finishing standards (29 CFR 1910.94) apply across all installations. Verified-fitment kits maintain the original engineering-spec capture rating per build; the side-downdraft airflow profile is documented in the engineering package alongside the geometric capture rating.

Who runs the Rohner Side Downdraft

Three populations dominate the Rohner Side Downdraft installed base. First, heavy-equipment manufacturing facilities where downdraft-style airflow was required for finish quality but a floor pit wasn't viable, typically older buildings or shared-floor operations. Second, large-vehicle and rail-equipment coating operations where the side-extraction pattern matched the part geometry better than a floor-pit downdraft. Third, specialty-finishing facilities, agricultural, marine, large-format component, where the side-downdraft engineering spec matched a recurring part type.

Rohner Side Downdraft filter FAQs

How do I confirm the published-spec base fitment is correct for my installation?

The Rohner nameplate carries the customer-build identifier, and the engineering-specification documentation that shipped with the original install is the canonical reference. The Filter Finder accepts the nameplate photo, the engineering documentation (if available), and interior measurements including both side-wall exhaust positions for verified-fitment matching. Variation across Rohner Side Downdraft installations is high enough that field-verification meaningfully increases confidence.

What's the source confidence on this fitment, and what does that mean for me?

**Distributor-cross-ref (authorized-dealer cross-reference)**, kit ships with quote-back form to upgrade to field-verified. The Rohner Side Downdraft quote-back form is stronger than typical because variation across installations is high and side-wall exhaust dimensions in particular vary across the installed base. When you paste back your verified measurements, the record upgrades to field-verified and your subscription locks in. If your measurements differ from the published-spec base, we ship a corrected kit at no charge.

Why are my two side-wall exhaust pads cycling at different rates?

Asymmetric loading is common on side-downdraft configurations and traces to operator spray-pattern habits, part placement, or one-sided airflow imbalance. Verify spray-pattern habits and part centering. If the imbalance persists, the AMU and side-fan balance may have drifted, that routes to professional service rather than filter replacement. Subscription cadences accommodate per-position cycles rather than assuming both sides cycle together.

What if I've lost the original Rohner engineering documentation?

Per-booth field verification through the Filter Finder is the documented path forward. We help reconstruct the filter-fitment specification from interior measurements, nameplate identification, and any retained dealer-side records. The published-spec base fitment ships first; the field-verification quote-back upgrades the record from there.

Can I run waterborne or specialty coatings through a Rohner Side Downdraft?

Yes, side-downdraft is meaningfully accommodating to waterborne because the ceiling-down airflow sweeps overspray downward before the side extraction pulls it outward. Verify the AMU air-handling spec accommodates waterborne; polyester-arrestor or pocketed-paper as upgrade exhaust media often makes sense.

Does the side-downdraft geometric capture differ from full-pit downdraft?

Yes, slightly. Side-downdraft trades floor-pit construction commitment for a different geometric capture profile, typically very close to full-pit downdraft on most coatings but slightly different on overspray-heavy specialty coatings where pit geometry helps. Your Rohner engineering package documents the specific capture rating for your build; verified-fitment kits maintain that rating.

Sources

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