PrimeShield Max Airflow Fiberglass Panel Filters – MERV 1–4, 12-Pack

Description

The PrimeShield MAX Airflow fiberglass panel filter is our most affordable option — a commercial-grade disposable built for one job: protect your HVAC equipment from large debris without restricting airflow. If you manage a rental portfolio, stock backup filters for a facility, or swap filters monthly and want the lowest per-filter cost, this is the pack for you.

What This Filter Is (and Isn’t)

MERV 1-4 fiberglass captures large particulate — dust, lint, carpet fibers, hair, and insects — keeping your blower motor, coil, and ductwork clean. It’s built for equipment protection, not air quality improvement. If you need to capture pet dander, pollen, mold spores, or smoke, step up to a pleated filter at MERV 8 or higher.

Why Buyers Choose MERV 1-4

• Lowest cost per filter — case pricing on 12 filters in your chosen size
• Highest airflow — minimal pressure drop, ideal for older systems with smaller blowers or systems that can’t handle pleated media resistance
• 30-day changeout cycle — the “cheap and frequent” approach that some HVAC techs actually prefer
• Rental-property friendly — affordable enough to swap on every turnover
• Pre-filter role — works as an upstream pre-filter in systems with a high-MERV final filter

Who This Is For

• Property managers standardizing on the lowest-cost option across rental units
• Landlords & second-home owners keeping a year’s supply on hand
• Facilities teams buying pre-filters by the case
• HVAC contractors doing service-call swaps
• Homeowners with systems where airflow is the primary concern (older blowers, long duct runs)

Build Specifications

• Media: High-loft, skin-backed fiberglass with progressive density
• Frame: One-piece moisture-resistant kraft board with interlocking corners
• Final resistance: 0.50″ W.G.
• Rated velocity: 300 FPM
• UL Standard 900 classified
• Max operating temperature: 200°F (93°C)
• Tolerance: ±1/8″ height/width, ±1/16″ depth
• Changeout: Recommended every 30 days
• Quantity: 12 filters per pack

Don’t See Your Size?

We cut custom sizes to 1/8″ precision. Measure your filter rack and we’ll build to your exact specification.

Filter Fit Guarantee

If a filter doesn’t fit your system as expected, we’ll make it right. Questions before you order? Call 1-866-469-8556 — we’ve been helping customers pick the right filter since 2006.

Manufacturing Notes

PrimeShield MAX Airflow filters are produced to our proprietary PrimeShield specifications by one or more partner manufacturers. Part numbers may vary by production run, but every filter meets identical specifications: high-loft skin-backed fiberglass media, single-piece kraft board frame, 0.50″ W.G. final resistance, 300 FPM rated velocity, UL 900 classification, 200°F max operating temperature, and ±1/8″ height/width / ±1/16″ depth tolerances. Size and performance are consistent across all production runs.

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