Profile: Johns Manville is a supplier of air filtration media for pocket filters and pleated box filters. We offer the most complete line of products designed to meet American society of heating, refrigeration, and air-conditioning engineers (ASHRAE) 52.1 and 52.2 performance requirements including Micro-Aire high-loft microglass media. Micro-aire is the most widely-used heating, ventilation, & air conditioning (HVAC) high-loft microglass media to provide consistent performance in real-life applications. It can also be used in difficult high-temperature, Class-1 fire-rated, or oil-mist applications where synthetic media often fail. It is ideal for extended-surface pocket filters or deep-pleated rigid box filters.

The company was founded in 1858, has revenues of USD 50-100 Million, has ~7500 employees. NYSE:brk.a (SEC Filings)