Inside the 12 Inch Intake Filter Box
At 12 in this is a substantial piece of steel: 19.9 x 20 x 7.8 in and 13.4 lbs. Plan the support before fitting it. Inside is an ISO Coarse 45% / MERV 5 fiber mat in a galvanized sheet steel housing, chosen to filter incoming air without strangling it.
Servicing the MERV 5 Intake Filter
Access is by toggle fastener, so no tools are needed to change the mat. Replace it every three to six months. Because a box this size is heavy, hang it on its own support rather than letting the duct carry it. The mat handles particles only; odour control stays with the exhaust carbon filter. Watch the pressure drop as it loads, since at 12 in a clogged mat costs real airflow. Mount it where the lid can swing clear, otherwise servicing turns into a two-person job.
Key Features
- ISO Coarse 45% / MERV 5 Mat: Coarse on purpose, so it traps debris without strangling the intake.
- Galvanized Steel Housing: Holds its shape and resists corrosion in a damp intake path.
- Toggle Fastener: Opens without tools, so mat changes take about a minute.
- 3 to 6 Month Mat Life: A realistic interval, shorter in a dusty or high-pollen space.
- Recyclable Mat: The media can be recycled rather than binned.
- 12 in Duct Fit: Sized for Ruck 12 in components and standard 12 in duct.
Technical Specifications
| Specification | Value |
|---|---|
| Duct Size | 12 in |
| Filter Class | ISO Coarse 45% (G3) / MERV 5 |
| Housing | Galvanized sheet steel |
| Fastener | Toggle type |
| Dimensions (L x H x W) | 19.9 x 20 x 7.8 in |
| Weight | 13.4 lbs |
| Filter Replacement | Every 3 to 6 months |