Based on recent industry evaluations and updated testing standards, our 1” Fiberglass A/C Filter's Minimum Efficiency Reporting Value (MERV) rating has been revised from MERV4 to MERV1. For more information, please see our Industry Alert homepage.
- Disposable filter media
- Clean air filters increase air flow and efficiency
- Flat panel
- 18" x 21"
- 12/CS
- Mfg: 11204C011821
- Length: 21"
- Width: 18''
- Depth: 1"
- Size: 18X21X1
- Type: MERV 1
- Page: 523
- Master Case Quantity: 12
18X21X1 A/C FILTER - 12/CS- MERV 1
Item: 101004
Unit: CS
Catalog Page: 523
- Disposable filter media
- Clean air filters increase air flow and efficiency
- Flat panel
- 18" x 21"
- 12/CS
| Mfg: | 11204C011821 |
| Length: | 21" |
| Width: | 18'' |
| Depth: | 1" |
| Size: | 18X21X1 |
| Type: | MERV 1 |
| Page: | 523 |
| Master Case Quantity: | 12 |
