Capstone Partners, the Boston-based investment banking and advisory firm that tracks M&A activity across industrial sectors, published its HVAC Equipment Sector M&A Update for April 2026 — providing one of the most detailed analyses available of deal trends, valuation multiples, and demand drivers in the HVAC manufacturing and equipment M&A market. The report's key findings confirm several themes that this publication has been tracking across individual transactions: the data centre thermal management market is the primary deal catalyst, traditional HVAC equipment M&A remains constrained by tariff and cost pressures, and liquid cooling technologies are the hottest acquisition targets.
The headline numbers from Capstone's update: HVAC equipment M&A fell 6.9% year-over-year to 122 announced or completed transactions in the full-year 2025 data — representing relative strength compared to the broader Industrials industry, which saw M&A volume drop 24.6% year-over-year. More importantly for the current moment, sector deal volume has stabilised through year-to-date 2026, rising by one deal year-over-year to 17 acquisitions — a modest but meaningful positive signal after the 2025 volume decline.
Why HVAC Equipment M&A Is Stabilising in 2026
The stabilisation of HVAC equipment M&A activity in 2026 reflects two converging forces that Capstone identifies:
• Easing macroeconomic conditions: The interest rate environment has improved somewhat from the peak, making deal financing more accessible and reducing the discount that acquirers apply to future cash flow projections. Lower rates improve deal economics for both strategic and financial buyers.
• Data centre demand renewal: The AI infrastructure investment wave has created specific, concentrated demand for data centre thermal management solutions — exactly the type of focused demand that generates M&A activity as established HVAC companies acquire technology capabilities and as financial buyers identify emerging leaders in the cooling technology market.
The 2025 tariff headwind that suppressed deal activity has not disappeared — the 25% tariff on steel and aluminum imports (raised from the prior level in August 2025) continues to pressure equipment manufacturers' cost structures. But the data centre demand tailwind is strong enough to offset the tariff headwind in the specific segment where it is most acute: thermal management technology.
Capstone Partners' April 2026 HVAC Equipment M&A update confirms sector deal volume stabilised in 2026 YTD (up 1 deal year-over-year to 17 transactions) as data centre thermal management and liquid cooling technologies drove renewed acquisition interest — despite the 25% steel and aluminum tariff headwind that suppressed broader HVAC equipment M&A activity in 2025.
The Hot Spots — What Is Being Acquired
Capstone's analysis identifies the specific deal categories that are driving HVAC equipment M&A activity in 2026:
• Liquid cooling: Direct-to-chip, immersion, and rear-door liquid cooling for data centres. The KKR/CoolIT Systems transaction (15x return, $4.75B Ecolab acquisition), Trane's LiquidStack acquisition, and Carrier's ZutaCore investment all reflect this trend.
• AI-integrated thermal management: Companies that combine HVAC equipment with AI-powered control and optimisation software — the intersection where hardware margins are supplemented by recurring software revenue. Samsung's FläktGroup acquisition fits this profile.
• High-efficiency refrigerant technology: Companies with proprietary HFO or natural refrigerant technology that positions them well for AIM Act compliance demand. Honeywell's Solstice spin-off into a standalone public company reflects the market's recognition of refrigerant technology value.
• VRF and heat pump manufacturers: Commercial VRF and cold-climate heat pump companies that capture the electrification trend. Paloma-Rheem's $1.63B Fujitsu General acquisition is the most significant recent example.
Valuation Trends in HVAC Equipment M&A
Capstone's update confirms that premium valuations in HVAC equipment M&A are concentrated in data centre thermal management and AI-integrated solutions. Traditional air chiller and packaged equipment manufacturers are transacting at more moderate multiples, with tariff cost pressure and residential volume weakness constraining valuation expansion. The bifurcation between technology-differentiated thermal management assets (commanding premium multiples) and traditional HVAC equipment (moderate multiples) is the defining feature of the 2026 HVAC equipment M&A market.
Frequently Asked Questions
How is HVAC equipment M&A performing in 2026?
Capstone Partners' April 2026 update shows HVAC equipment deal volume stabilised in 2026 YTD, rising by one deal year-over-year to 17 transactions after a 6.9% decline to 122 deals in full-year 2025. Data centre thermal management and liquid cooling technologies are the primary demand drivers renewing deal activity.
What types of HVAC companies are being acquired most actively in 2026?
The most actively acquired HVAC equipment categories in 2026 are liquid cooling technology companies (direct-to-chip, immersion), AI-integrated thermal management platforms (combining hardware with recurring software revenue), high-efficiency refrigerant technology companies, and VRF and cold-climate heat pump manufacturers capturing the electrification trend.
