Formulated to specifications shown per ANSI/ASHRAE Standard 52.2P. Designed for testing filters and components of heating, refrigeration, and air conditioning systems.
| Type | ASHRAE #2 |
| Standard | ANSI/ASHRAE 52.2P |
| Composition | 93.5% ISO 12103-1 A2 Fine, 6.5% Milled Cotton Linters |
