Mann+hummel 12104-011820 Merv 4 Panel Filter 18x20x1

Product Description

The MANN+HUMMEL 12104-011820 is a disposable polyester panel air filter rated MERV 4, designed for light-to-medium duty air filtration in commercial and industrial HVAC systems. Measuring 18 x 20 x 1 inches nominal, this one-sided die-cut panel filter uses a polyester media to capture larger airborne particulates such as dust, lint, and pollen. The moisture-resistant Kraft board frame includes a reinforcing grid on one side for structural support during operation. At 1 pound, the unit is lightweight and straightforward to handle. This filter is metal-free, making disposal simpler and more environmentally responsible. HVAC technicians and facilities maintenance staff install this filter as part of a routine 30-day change-out schedule in moderate-load air handling systems.

The 12104-011820 is built for commercial and institutional environments where consistent, cost-effective air filtration is required without high-efficiency media. Typical applications include schools, hotels, commercial office buildings, hospitals, pharmaceutical plants, and laboratories. It fits standard 18 x 20 x 1 inch filter slots in rooftop units, air handling units, and packaged HVAC equipment. The SelectPDC series is manufactured in the USA and is suited for facilities that change filters on a regular schedule and prioritize easy, tool-free installation.

Key Features

• MERV 4 polyester media targets lint, dust, and coarse particulate in light-to-medium duty applications
• Nominal size 18 x 20 x 1 inches fits standard commercial filter slots
• One-sided die-cut Kraft board frame with reinforcing grid for structural integrity
• Metal-free construction simplifies disposal and supports environmentally responsible maintenance programs
• Moisture-resistant frame maintains shape in humid air stream conditions
• Made in the USA

Compatibility

Designed as an OEM-style replacement panel filter for commercial and industrial air handling units, rooftop units, and packaged HVAC equipment accepting a nominal 18 x 20 x 1 inch disposable panel filter with a MERV 4 rating.

Installation Notes

Installation is performed by licensed HVAC technicians or qualified facilities maintenance personnel. Power down or place the air handling unit in service mode before opening the filter access panel to prevent unfiltered air bypass and protect downstream coils. Verify airflow direction arrows on the frame align with the system airflow before seating the filter. Follow a 30-day change-out interval or adjust based on site conditions and differential pressure readings across the filter bank.