Junair · Semi-downdraft
Junair 1 Series
Filter kit, alternatives, and current pricing for the 1 Series.
Junair model • 1 Series
Junair 1 Series Filter Program
Semi-downdraft entry rung of the Junair ladder: EU5 input media at 3650 x 2000mm, wall-grid exhaust arrestor, confirmed by fitment check.
The specification sheet behind this page is a UK-market document: 415V three-phase 50Hz supply at 20 to 32A, with a working chamber listed at 7,000mm long by 4,000mm wide by 2,500mm high. That matters for two reasons. First, it tells you the 1 Series was engineered around a full-size car chamber even at the entry spec. Second, it means North American installs went through an importer or installer who may have altered supply and air-handling details, which is why we confirm filter sizes against your actual housings rather than shipping straight off the sheet.
Quick answer
Junair, badged JBI in some markets, builds its booth range as a numbered ladder, and the 1 Series is the entry rung: a semi-downdraft booth that takes intake air in through ceiling media and exhausts through a wall-level grid, no pit excavation required. The manufacturer's specification sheet lists an EU5 input filter at 3650 x 2000mm, burner options from 100 to 170kW, and fan options from 3.0 to 5.5kW. No cross-referenced filter SKUs are on file for this model yet, so media is programmed by booth type and confirmed with a fitment check before bulk ordering.
How 1 Series shops choose filters
Intake side. The documented input stage is EU5-class media at 3650 x 2000mm. EU5 is a European filter classification for fine-dust media, the class commonly used for booth input and ceiling filtration; the practical takeaway is that this stage sets your finish quality, and it is the one to keep freshest. On a semi-downdraft the ceiling media covers part of the ceiling area rather than the full footprint, which keeps per-change cost down relative to Junair's full-downdraft rungs.
Exhaust side. Semi-downdraft booths exhaust through a wall-level grid, typically at the rear. Arrestor media, fiberglass or pocketed paper, is cut or paneled to the measured grid. The specification sheet does not document the exhaust opening, so that dimension comes from your tape measure or a photo.
Fan headroom. With fan options from 3.0 to 5.5kW, the 1 Series carries the smallest motor band in the Junair ladder. Smaller fans have less headroom to push through loaded media, so pressure rise shows up as airflow loss sooner than it would on a 5 Series. A manometer across the exhaust stage is worth more here than on any bigger booth.
Regulatory landscape
A UK-designed booth in a US shop answers to US rules. EPA 6H applies to the spraying activity, not the booth's origin: refinish work at an area source belongs inside a ventilated, filtered booth maintained per specification, with filter changes documented. OSHA 1910.94(c) sets the ventilation floor for spray finishing operations, and a semi-downdraft that has lost velocity to loaded media fails that expectation just as a downdraft would. NFPA 33 governs arrestor condition on the fire side. The supply-voltage difference between the UK sheet and your panel is an installer question, not a filter question.
Who runs the 1 Series
The 1 Series buyer profile is the shop stepping up into booth ownership: an independent moving from open-shop spraying or a curtain setup into a real chamber without the cost of a pit. The second profile is the multi-line shop using a 1 Series as its second booth for prep, primer, and overflow while a bigger downdraft handles finish work. Both profiles tend to run lean crews, which is why the filter program here leans on simple, evidence-driven changes rather than elaborate schedules.
1 Series filter FAQs
What does semi-downdraft mean on the Junair 1 Series?
Air enters through ceiling-mounted input media and exits through a wall-level exhaust grid instead of a floor pit. You get most of the top-down airflow benefit of a downdraft without excavation, at some cost in airflow straightness near the floor.
What is an EU5 input filter?
EU5 is a European filter classification for fine-dust media, and it is the class the Junair sheet specifies for the 1 Series input stage at 3650 x 2000mm. Functionally it is the finish-protecting stage: it conditions and cleans the air that lands on your paint.
My 1 Series is installed in North America. Can you still match filters?
Yes. The airflow layout and filter positions carry over regardless of the electrical supply, but import installs sometimes vary in housing details, so we confirm each slot dimension against your booth before bulk quantities ship.
How does the 1 Series differ from the Junair 3 Series for filters?
The 1 Series is a semi-downdraft with a partial-ceiling input stage and wall exhaust; the 3 Series is a full downdraft with a full-ceiling input filter and floor-level extraction. The 3 Series consumes more input media per change and adds floor media to the program.
Why does this page ask for a fitment check?
The record is built from the manufacturer's specification sheet and carries needs-verification status: no distributor SKU cross-references are on file yet. A fitment check turns the sheet data into confirmed slot sizes, and the record upgrades from there.
Sources
Primary references cited on this page.
- Junair 1 Series manufacturer specification sheethttps://www.junair-spraybooths.co.uk/wp-content/uploads/2019/07/1-Series-Specification-Sheet.pdf
- EPA 40 CFR Part 63 Subpart HHHHHH (NESHAP 6H)https://www.epa.gov/stationary-sources-air-pollution/national-emissions-standards-paint-stripping-and-miscellaneous
- OSHA 29 CFR 1910.94(c), Ventilation: spray finishing operationshttps://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.94