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10 mm-slot filters · A$22 delivery Australia-wide
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RenAir #21 filter for a 900 × 550 mm nominal grille, angled view (representative photo)

Choose a number to see its product photos and fit details.

Choose your RenAir number

Green number circles · For 10 mm grille slots.

Sizes below are printed (nominal) grille sizes, in mm.

Available to order

#40750 × 450 #41800 × 500 #42900 × 500 #44600 × 400 #45700 × 500
Can’t see your number? View all Other sizes — check availability

Select your number to see its dimensions and ask us about availability.

#21900 × 550 #22500 × 500 #231200 × 400 #24700 × 550 #251000 × 400 #26750 × 500 #27400 × 400 #28300 × 300 #291500 × 400 #301000 × 500 #31700 × 400 #32600 × 600 #33900 × 450 #34800 × 600 #37800 × 700 #38700 × 700 #39600 × 450 #431100 × 500 #46600 × 500 #47600 × 300 #48750 × 400 #49900 × 400 #50750 × 550
Find the number or grille code

If your existing filter has a RenAir number, enter it in the search above. Don’t use another brand’s number as a RenAir number.

If you have a Polyaire grille model or code, check it in the grille-code guide.

No label? Measure your existing filter or send us a photo.

Measure my filter or use a printed size
Size printed on my grille

Use the size printed on the grille label or its product specification. Do not enter the outside frame or visible grid dimensions here.

Results still need a matching 10 mm slot and filter bottom-box dimensions.

Measurements of my existing filter

Measure the outside length and width of the larger bottom box of the stepped filter, not the smaller top box. Compare those measurements with the product’s fit details. Do not enter them as a nominal grille size.

See the measurement guide

Help me match my measurements

Send us a photo to check the fit

Send a photo of your return-air grille and we’ll help you check the fit. A person will review it and reply by email.

Upload a photoEmail a grille photoUse the enquiry form

One photo, under 20 MB. For several photos, use email. Please wait for fit confirmation before ordering.

support@renairfilters.com.au

Select a number to begin

Its photo, fit details and price will appear here.

A$22 delivery Australia-wide · Dispatched from Adelaide.

Let’s check the fit.

Tell us your filter number, grille size and filter slot. If you are not sure, describe what you have and we’ll help you work out the next step.

Our team will review your enquiry and get back to you by email.

To include a photo, attach it to an email to support@renairfilters.com.au.

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