About FlatLine Filter
FlatLine Filter is an independent review site focused on paint booth filtration — intake media, exhaust arrestors, overspray pocket filters, and pre-filter pads. We're built and run by people who've spent careers around paint booths in automotive, industrial, custom, and refinish settings.
What we cover
Paint booth filters across every booth geometry: crossdraft, downdraft, semi-downdraft, side-draft, open-face prep, and Dürr-style trolley booths. We focus on the questions shop owners and operators actually face: which filter for which stage, how often to change, what the real cost-per-paint-hour comes out to, and which brands are worth specifying versus avoiding.
How we rank
Our rankings are based on holding capacity, pressure drop curve, total cost of ownership, and on-floor reliability. We do not run lab tests; we look at how filters perform in production. Where we have direct experience with a brand from real shop walks, we say so. Where we're working from manufacturer spec sheets and customer feedback, we say that too.
How we're funded
FlatLine Filter is reader-supported. Some links on this site are affiliate links — including links to Amazon (through the Amazon Associates program) and direct links to filter manufacturers — and we may earn a commission on purchases made through those links, at no extra cost to you.
Affiliate compensation does not influence rankings. Our editor's pick is selected on performance and TCO, not on commission structure. If we ever recommend a filter we have a paid relationship with, the disclosure will be clear and the reasoning will be transparent.
Contact
Questions, corrections, or want to suggest a brand for review? Email hello@flatlinefilter.com.