AAF International Acquires Northeast Air Solutions

Rensa Filtration Acquires Aero Filter

October 12, 2026

HVAC & Mechanical

Rensa Filtration acquired Aero Filter, a Michigan-based distributor and service provider of air filtration solutions. The acquisition adds local technical sales and on-site service capabilities to Rensa’s regional network and expands its reach across Michigan.

Rensa Filtration Acquires Air Filters Northwest and AFNW Services

April 6, 2026

Industrial Services

Rensa Filtration, an Audax Private Equity portfolio company, acquired Air Filters Northwest and AFNW Services to expand its U.S. distribution footprint and field service capabilities in air filtration. The companies provide product distribution and on-site services such as filter installation, testing, and used filter recycling for critical environments including healthcare, semiconductor fabs, and data centers.

AirX Climate Solutions Acquires Northern Air Systems

March 19, 2026

HVAC & Mechanical

AirX Climate Solutions, Inc. acquired Northern Air Systems, Inc. to strengthen its mission-critical and specialty HVAC capabilities. Northern Air’s engineering and manufacturing capabilities for complex applications will be integrated into AirX’s HVAC portfolio, with Northern Air founder Tim Confer transitioning to a strategic advisor role and Will Rausch leading operations as general manager.

Saothair Capital Partners Acquires AAI (to be Renamed Air Products and Controls)

October 14, 2025

Manufacturing

Saothair Capital Partners has completed the acquisition of AAI from Halma Holdings Inc.; following the transaction AAI will be renamed Air Products and Controls (APC). Headquartered in Auburn Hills, Michigan, AAI designs and manufactures fire and life-safety detection devices (wireless smoke, heat and CO detectors) sold to residential security OEMs, HVAC and fire-system OEMs, and commercial distributors.

Daikin Applied Acquires Alliance Air Products

March 2, 2023

Manufacturing

Daikin Applied has acquired Alliance Air Products, a San Diego–based manufacturer of custom air-handling equipment. The acquisition expands Daikin’s portfolio and engineering capabilities—strengthening its data-center cooling and custom HVAC offerings while enabling faster delivery and broader end-to-end solutions for mission-critical applications.

AAF International Acquires National Air Filter Service Company of New Jersey

August 29, 2022

Industrial Services

American Air Filter Co., Inc. (dba AAF International), a global air filtration leader and subsidiary of Daikin Industries, has acquired National Air Filter Service Company of New Jersey, a long-established full-service air filtration management firm. The change in ownership was effective August 29, 2022 and is intended to strengthen AAF's service capabilities and continuity for customers and vendors.