Rensa Filtration Acquires The Filter Shop

Rensa Filtration Acquires Air Filtration Co., Inc.

January 27, 2025

Manufacturing

Rensa Filtration, a PE-backed manufacturer and distributor of air filtration products, has acquired Air Filtration Co., Inc., a family-owned maker and distributor of spray booth and industrial air filters with production facilities in Lancaster, California and Corydon, Iowa. The deal expands Rensa's geographic footprint in California and Iowa and adds Air Filtration Co.'s spray booth filtration product line to Rensa's portfolio.

Audax Private Equity Acquires Rensa Filtration

August 15, 2022

Manufacturing

Audax Private Equity announced the acquisition of Rensa Filtration, a U.S.-based manufacturer of mission-critical air filtration products. The transaction (terms undisclosed) represents a sponsor-to-sponsor sale from The Edgewater Funds (with prior co-investor Duchossois Capital Management); Rensa CEO Brandon Ost and management will remain in place with a significant ownership stake as Audax pursues a buy-and-build growth strategy.

Rensa Filtration (Edgewater-backed) Acquires Custom Filter, LLC

August 18, 2021

Manufacturing

Rensa Filtration, a portfolio company of Edgewater Growth Capital Partners IV, has acquired Custom Filter, LLC, a manufacturer of high-efficiency air filtration products including HEPA and ULPA filters. The deal is an add-on acquisition intended to expand Rensa’s engineered filtration product portfolio and OEM manufacturing capabilities.

Rensa Filtration (Edgewater) Acquires Air Filters, Inc.

December 1, 2020

Manufacturing

Edgewater Growth Capital Partners IV’s portfolio company Rensa Filtration has acquired Air Filters, Inc., a Houston-based manufacturer of pleated and HEPA air filtration products. The deal is an add-on acquisition intended to expand Rensa’s product portfolio and capabilities in commercial and industrial HVAC and critical-environment filtration.

Rensa Filtration (Audax-backed) Acquires IREMA-Filter GmbH and Aeolus Filter Corporation

September 16, 2025

Manufacturing

Rensa Filtration, a platform backed by Audax Private Equity, has acquired German filter-media specialist IREMA-Filter GmbH and its U.S. subsidiary Aeolus Filter Corporation. The deal expands Rensa’s manufacturing and technology capabilities in microfiber and nanofiber filter media while extending its geographic footprint across Europe and North America; financial terms were not disclosed.

Rensa Filtration Acquires APC Filtration and R.P. Fedder

September 6, 2023

Manufacturing

Rensa Filtration has acquired APC Filtration (Brantford, Ontario) and R.P. Fedder (Rochester, New York) and will operate them together with its Custom Filter business to form an expanded high-efficiency air filtration division. The acquisitions add complementary manufacturing, testing and OEM engineering capabilities to Rensa’s product lineup to serve education, healthcare and high-tech manufacturing end markets.