It's true! They are smaller and will whistle if you don't block the end. The whistle is annoying, but the point is that you're sucking in unfiltered air. There is no point in buying a "premium" air filter. At this price you don't have to do any extra work. This item is NOT SUCCESSFUL.
🏷️ Nordic Pure 20X25X5 Pleated Replacement Filter
10 Review
💨 Filtrete FAPF024: The Ultimate Air Cleaning Filter for a Healthier Home
12 Review
🏠 Aprilaire 213 Whole House Air Filter: Advanced Filtration for Purifiers
10 Review
🌬️ Nordic Pure 16x20x1 Pleated Air Filter 16x20x1M12 6 Pack - High Performance Filtration Solution
10 Review
NANPU 1 FRL Air Filter Regulator Lubricator Combo With 0-150 Psi Gauge, 5 Micron Brass Element, Poly Bowl & Semi-Auto Drain - Metal Bracket Included
20 Review
NANPU DFR-02 1/4" NPT Air Drying System - Double Air Filters, Air Pressure Regulator Combo - Semi-Auto Drain, Poly Bowl
20 Review
NANPU 3/8" NPT Compressed Air Filter Regulator Combo Piggyback, 5 Micron Brass Element, Poly Bowl, Semi-Auto Drain, Metal Bracket, 0-150 Psi Gauge
26 Review
NANPU 1/2" NPT Air Drying System - 5 Micron Particulate Filter, 0.01 Micron Coalescing Filter, Air Pressure Regulator Combo - Semi-Auto Drain, Poly Bowl W/Metal Gauge
23 Review