Tracked deals
17
17 tracked deals across 2020-2026.
HVAC & Mechanical Buyers & Acquisitions in Maryland
Buyer mix
Mixed buyer set
15 strategic · 11 pe
Top trend
Volume peaked in 2022
5 tracked deals announced in 2022.
Primary Insight
What Stands Out
- Investor-backed home-services platforms (e.g., HomeServe USA Corp., L Catterton, Ally Services, Sila Services) expand in and around Maryland via add-on acquisitions and retained local operations.
- Specialty HVAC and mechanical capabilities are a second clear lane: AirX Climate Solutions (ACS) acquired Powrmatic USA (commercial/industrial systems) and AboveAir Technologies (OEM precision cooling for data centers).
- Commercial/industrial engineering and construction capability building appears with CoolSys acquiring Mechanical Engineering & Construction Corporation (MEC2).
- Recurring acquirers across the period include Thompson Street Capital Partners, Gryphon Investors, HomeServe USA Corp., Len The Plumber, L Catterton, Alpine Investors, Orion Group, and Astra Service Partners.
- Geographic emphasis stays in the Mid-Atlantic / Greater Washington, D.C. orbit, with Maryland as the recurring anchor (including nearby Virginia, Pennsylvania, Delaware, and D.C. adjacency in several deals).
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Top Buyers
Illustrative buyers pulled from tracked transactions on this page. This table is capped and intentionally non-exhaustive.
| Buyer | # Deals | Focus | Type |
|---|---|---|---|
| AirX Climate Solutions, Inc. | 2 | Leading full-service specialty HVAC solutions provider of... | Strategic (PE-backed) |
| Gryphon Investors | 2 | Middle-market private equity firm focused on building and... | PE |
| Thompson Street Capital Partners | 2 | Middle-market private equity firm that invests across Lif... | PE |
| 3Phase Elevator | 1 | Independent elevator and escalator maintenance, repair, a... | Strategic (PE-backed) |
| Aldine Capital Partners | 1 | Private investment firm providing junior capital (subordi... | PE |
| Ally Services | 1 | Regional residential HVAC and plumbing services platform ... | Strategic (PE-backed) |
| Alpine Investors | 1 | People-first private equity firm investing in software an... | PE |
| Astra Service Partners | 1 | Network/platform of premium mechanical service providers ... | Strategic (PE-backed) |
| CoolSys | 1 | Provider of sustainable refrigeration, HVAC, energy and e... | Strategic |
| Flow Service Partners | 1 | Provider of HVACR and plumbing services (maintenance, rep... | Strategic (PE-backed) |
Acquisition Volume in HVAC & Mechanical in Maryland by Year
Last 7 years
Actual
Full-year estimate
Supporting Data
Recent Transactions
-
February 12, 2026
- Buyer
- Ally Services
- Target
- J Hood Services, Tri-County Aire, Above & Beyond
- Industry
- HVAC & Mechanical
- Location
- Maryland, United States
- Type
- Addon
Ally Services (backed by Watchtower Capital) completed three add-on acquisitions in 2025: J Hood Services (Manassas, VA), Tri-County Aire (Charlotte Hall, MD), and Above & Beyond (Laurel, DE). The deals expand Ally’s residential HVAC platform across Virginia and adjacent markets while preserving each acquired business’s local brand and employee base.
-
October 22, 2025
- Buyer
- Astra Service Partners, Orion Group, Alpine Investors
- Target
- Knott Mechanical, Inc.
- Industry
- HVAC & Mechanical
- Location
- Maryland, United States
- Type
- Addon
Astra Service Partners, a division of Orion Group and portfolio company of Alpine Investors, has made an investment in Knott Mechanical, Inc. SC&H Capital advised Knott Mechanical on the transaction. Knott Mechanical, founded in 2002, provides mechanical and HVAC maintenance, repair and retrofit services to over 1,700 buildings across the Mid-Atlantic.
-
December 4, 2024
- Buyer
- AirX Climate Solutions, Inc., Gryphon Investors
- Target
- Powrmatic USA
- Seller
- Stamm International Corporation
- Industry
- HVAC & Mechanical
- Location
- Maryland, United States
- Type
- Addon
AirX Climate Solutions (ACS), a Gryphon Investors-backed specialty HVAC platform, has acquired Powrmatic USA, a Finksburg, Maryland-based manufacturer of commercial and industrial heating, cooling and air turnover systems. Powrmatic, with ~30 employees, was divested by Stamm International Corporation and will operate under ACS to expand its specialty HVAC capabilities and mid‑Atlantic footprint.
-
- Buyer
- CoolSys
- Target
- Mechanical Engineering & Construction Corporation (MEC2)
- Seller
- Fred Kawa, Rich Beattie
- Industry
- HVAC & Mechanical
- Location
- Maryland, United States
- Type
- Buyout
CoolSys has acquired Mechanical Engineering & Construction Corporation (MEC2), a Maryland- and Virginia-based mechanical engineering and construction firm. The acquisition strengthens CoolSys's commercial and industrial capabilities while deepening its presence in the Mid-Atlantic region.
-
- Buyer
- AirX Climate Solutions, Inc. (ACS), Gryphon Investors
- Target
- AboveAir Technologies
- Industry
- HVAC & Mechanical
- Location
- Maryland, United States
- Type
- Addon
AirX Climate Solutions, a Gryphon Investors-backed platform, has acquired AboveAir Technologies, a Frederick, Maryland-based OEM of precision cooling solutions for data centers. AboveAir will operate as a new division of ACS with founder Matt Miller named President of the AboveAir division and becoming a shareholder; ACS will invest in manufacturing capacity at AboveAir's 100,000-square-foot facility and expand its Mid-Atlantic footprint.
-
September 27, 2023
- Buyer
- Southern Home Services
- Target
- Presidential Heating & Air Conditioning, Inc.
- Seller
- Wendell Nixon
- Industry
- HVAC & Mechanical
- Location
- Maryland, United States
- Type
- Addon
Southern Home Services has acquired Presidential Heating & Air Conditioning, Inc., a Gaithersburg, Maryland-based HVAC contractor, marking Southern's first business unit in Maryland. The acquired business will continue to operate under its existing name with employees retained, as Southern expands its residential HVAC, indoor air quality and service offerings in the Mid-Atlantic.
-
June 26, 2023
- Buyer
- Watchtower Capital Partners, Aldine Capital Partners
- Target
- SPS Mechanical, JF Plumbing & Heating, CarrFord Heating & Air Conditioning
- Seller
- Founders of SPS Mechanical, Founders of JF Plumbing & Heating, Founders of CarrFord Heating & Air Conditioning
- Industry
- HVAC & Mechanical
- Location
- Maryland, United States
- Type
- Buyout
Watchtower Capital Partners led a platform investment to form Ally Services by simultaneously acquiring SPS Mechanical and JF Plumbing & Heating, with Aldine Capital Partners providing subordinated debt and equity. Ally, a regional provider of plumbing, HVAC and water-filtration services serving over 3,000 residential and light-commercial customers across the Mid-Atlantic, immediately completed an add-on acquisition of CarrFord Heating & Air Conditioning to expand its New Jersey footprint.
-
July 27, 2022
- Buyer
- Flow Service Partners, RLJ Equity Partners, LP First Capital
- Target
- R Brooks Mechanical Heating and Air Conditioning
- Industry
- HVAC & Mechanical
- Location
- Maryland, United States
- Type
- Addon
Flow Service Partners, a platform backed by RLJ Equity Partners and LP First Capital, has acquired R Brooks Mechanical Heating and Air Conditioning. The add-on expands Flow's HVACR and plumbing capabilities and extends its geographic footprint into Maryland, Pennsylvania and Delaware; financial terms were not disclosed.
-
June 13, 2022
- Buyer
- SuperHero Fire Protection, LLC, Hidden Harbor Capital Partners
- Target
- Judd Fire Protection, LLC
- Seller
- Fred Judd, Diane Judd
- Industry
- HVAC & Mechanical
- Location
- Maryland, United States
- Type
- Addon
SuperHero Fire Protection, a portfolio company of Hidden Harbor Capital Partners, has acquired Judd Fire Protection, a Westminster, Maryland-based provider of fire protection installation and services. The transaction expands SuperHero’s geographic footprint into Maryland/D.C. and increases recurring service and retrofit revenue for the platform.
-
May 26, 2022
- Buyer
- Sila Services, LLC
- Target
- TriState Home Services, LLC
- Industry
- HVAC & Mechanical
- Location
- Maryland, United States
- Type
- Addon
Sila Services, a home-services platform, has acquired TriState Home Services, a Frederick, Maryland-based provider of HVAC, plumbing and electrical services. The deal expands Sila's residential service footprint and capabilities in the Greater Washington, D.C. metro area.
-
April 20, 2022
- Buyer
- HomeServe USA Corp.
- Target
- Ken Griffin Plumbing Services, Inc.
- Seller
- Ken Griffin, Kathy Griffin
- Industry
- HVAC & Mechanical
- Location
- Maryland, United States
- Type
- Buyout
HomeServe USA Corp. has acquired Ken Griffin Plumbing Services, Inc., a family-owned full-service plumbing company based in Dayton, Maryland that serves Howard County. The Ken Griffin team — including founder Ken Griffin and existing staff — will remain with the business; HomeServe said the deal strengthens its service offering in the greater Washington, D.C. area and complements recent local HVAC acquisitions.
-
March 22, 2022
- Buyer
- L Catterton
- Target
- LTP Home Services Group
- Seller
- Thompson Street Capital Partners
- Industry
- HVAC & Mechanical
- Location
- Maryland, United States
- Type
- Buyout
L Catterton has agreed to acquire LTP Home Services Group, a residential plumbing and HVAC platform operating under brands including Len the Plumber, from Thompson Street Capital Partners (TSCP), which will retain a minority stake and a board seat. The transaction positions L Catterton to scale LTP’s platform through continued acquisitions and geographic expansion across the Mid-Atlantic and Southeast, leveraging LTP’s reputation for customer service and technician quality.
-
October 13, 2021
- Buyer
- 3Phase Elevator
- Target
- Advanced Elevator
- Industry
- HVAC & Mechanical
- Location
- Maryland, United States
- Type
- Addon
3Phase Elevator and Advanced Elevator have merged, with Advanced joining the 3Phase family to strengthen 3Phase's presence in the Greater Washington, D.C. and Baltimore markets. The deal allows Advanced to remain led by founder Stanley Smentkowski Sr. (with his son) while leveraging 3Phase's digital capabilities and automation to support growth and service delivery.
-
- Buyer
- Len The Plumber, Thompson Street Capital Partners
- Target
- Larry & Sons Plumbing, Heating, Cooling, Drain, and Electrical Services
- Industry
- HVAC & Mechanical
- Location
- Maryland, United States
- Type
- Addon
Len The Plumber, a Thompson Street Capital Partners portfolio company, has acquired Larry & Sons Plumbing, Heating, Cooling, Drain, and Electrical Services, a residential plumbing and HVAC company based in Hagerstown, Maryland. The add-on deal expands Len The Plumber's service capabilities (plumbing, HVAC, electrical) and footprint in the Mid-Atlantic region; terms were not disclosed.
-
- Buyer
- HomeServe USA Corp.
- Target
- Environmental Systems Associates, Inc.
- Seller
- Richard Dean, Michael Hendricks
- Industry
- HVAC & Mechanical
- Location
- Maryland, United States
- Type
- Addon
HomeServe USA has acquired Environmental Systems Associates, Inc. (ESA), a Columbia, Maryland-based residential HVAC contractor with more than 35 employees. ESA's owners Richard Dean and Michael Hendricks will remain with the business as it becomes part of HomeServe's locally branded HVAC network, expanding HomeServe's presence in the Greater Washington, D.C. market.
-
February 19, 2020
- Buyer
- Thompson Street Capital Partners
- Target
- Len the Plumber
- Industry
- HVAC & Mechanical
- Location
- Maryland, United States
- Type
- Buyout
Thompson Street Capital Partners (TSCP) has partnered with management to acquire Len the Plumber, a full-service residential plumbing and HVAC provider serving the Baltimore–Washington metro area. Terms were not disclosed. TSCP intends to support the company’s growth and execute an aggressive add-on M&A strategy to expand the platform.
-
January 21, 2020
- Buyer
- Tate Engineering Systems, Inc.
- Target
- Site Support Services, Inc.
- Seller
- R. Donald Mellinger (CEO & Owner of Site Support Services)
- Industry
- HVAC & Mechanical
- Location
- Maryland, United States
- Type
- Buyout
Tate Engineering Systems, Inc., headquartered in Baltimore, announced on January 21, 2020 that it has acquired Site Support Services, Inc. (SSS), a Towson-based specialist in precision cooling, power solutions and mission-critical facility services. R. Donald Mellinger, CEO and owner of SSS, sold the business and will continue with the combined organization; terms were not disclosed.
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Frequently Asked Questions
Which types of HVAC & mechanical deals show up most in Maryland?
Most transactions are platform-driven growth—residential HVAC and related home services, plus add-on acquisitions that keep local brands and employee teams in place.
Are specialty HVAC manufacturing deals included, or just contractors?
Both are represented. The page includes contractor/service acquisitions (e.g., HVAC and plumbing) and specialty OEM/manufacturer acquisitions such as Powrmatic USA and AboveAir Technologies by AirX Climate Solutions (ACS).
Who are the recurring buyers behind these Maryland transactions?
Recurring names include Thompson Street Capital Partners, Gryphon Investors, HomeServe USA Corp., L Catterton, Alpine Investors, Orion Group, and service-platform investors such as Astra Service Partners (with involvement from Orion Group and Alpine Investors in at least one deal).
Do these deals stay focused within Maryland?
Maryland is the anchor, but several acquisitions explicitly expand beyond the state—into the Mid-Atlantic and Greater Washington, D.C. orbit (including nearby Virginia, Pennsylvania, Delaware, and D.C. adjacency where noted).
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