Filters
2×4 ft replacement HEPA filter
A replacement filter for compatible 2×4 fan filter units.
$598.00–$698.00
Reference price · delivered quote availableSee specs Equipment / Filters
Filters / Flowhoods catalog
20×20×1 in. MERV 11 prefilters
MERV 11 intake prefilters help keep dust off the main HEPA filter. Match the 20 × 20 × 1 in. size to your unit before ordering.
Reference product price
$89.00
Price checked September 25, 2026 · final pricing in your quoteRequest delivered quoteEnter your quantity and shipping address. We’ll email a quote within 24 hours; if you approve it, we’ll send an invoice. No payment is collected now.
Delivery: Shipping to the lower 48 states is included in the listed price. Other destinations may cost more.
Product details
Check the fit.
Compare the dimensions, filter, and power requirements with your workspace. Add any questions about fit or options to your quote request.
- Size
- 20 × 20 × 1 in.
- Rating
- MERV 11
- Fit
- FFUs with a 20 × 20 × 1 in. intake prefilter
- Manufacturer
- KETCH, Wichita, Kansas
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