Trane Technologies makes heating, cooling, and refrigeration systems for buildings, homes, and trucks. It sells equipment under two main brand names: Trane, which covers commercial and residential climate control, and Thermo King, which keeps cargo cold while it moves. When a hospital buys a new chiller, a warehouse installs a rooftop air conditioner, or a refrigerated truck needs a new unit, Trane is likely involved. The company earns money three ways: selling the equipment itself, selling the parts and supplies needed to keep that equipment running, and providing service agreements that customers pay for on a recurring basis. Revenue in 2025 reached $21.3 billion, split across the Americas ($17.2 billion), Europe, Middle East and Africa ($2.8 billion), and Asia Pacific ($1.4 billion). The diagram below traces where the money goes.
Five years of financial data tell a clear story of consistent growth. Revenue climbed every single year, from $14.1 billion in 2021 to $21.3 billion in 2025. That is a gain of more than $7 billion over four years. But raw revenue growth alone does not tell you whether a company is getting better at its job. Gross margin does. Gross margin is the share of each dollar of revenue left over after paying to make the product. A rising gross margin means the company is either charging more, spending less to produce, or both.
The gross margin improvement is meaningful. Four and a half percentage points of margin on a $21 billion revenue base is a large number. The company says the gains came from pricing discipline and productivity improvements, partially offset by inflation in materials and labor. Cash generation also improved sharply. Free cash flow, which is the cash left over after running the business and paying for upkeep, rose from $1.4 billion in 2021 to $2.8 billion in 2025. That extra cash funds dividends, share repurchases, and acquisitions. Net debt, meaning total borrowings minus cash on hand, peaked at $3.7 billion in 2023 and fell to $2.9 billion by 2025, suggesting the business is generating enough cash to pay down obligations while still growing.
One forward-looking signal worth watching is the order backlog. At the end of 2025, Trane held $7.8 billion in firm orders waiting to be filled, up from $6.7 billion at the end of 2024. Most of that backlog is expected to convert into revenue during 2026. A growing backlog generally means demand is arriving faster than the company can ship, which provides some visibility into near-term revenue.
Not everything points in one direction. The company faces several documented risks that a reader should weigh carefully. The most financially uncertain is an unresolved asbestos liability. Two subsidiaries named Aldrich and Murray filed for bankruptcy protection in 2020 specifically to manage asbestos claims from past products. Those bankruptcy cases are still open as of early 2026. A hearing to estimate the total liability is scheduled to begin in August 2026. Trane has already funded a $270 million settlement fund, but the final cost is unknown. Until a court approves a plan, this liability sits unresolved on the edge of the balance sheet.
Beyond asbestos, the company faces three other well-documented threats. First, refrigerant regulations are changing. Governments are phasing out older refrigerants with high global warming potential and requiring new ones. Products built around the old refrigerants could become harder to sell or need costly redesigns. Trane is spending to comply, including $347.6 million on research and development in 2025, but success is not guaranteed. Second, the company depends on steel, copper, aluminum, and electronic components from global suppliers. Wars, natural disasters, or trade restrictions can disrupt that supply or raise costs quickly. Third, the company derives about 25% of its revenue from outside the United States, which means it is exposed to currency swings, tariff changes, and geopolitical tensions including the ongoing conflicts in Ukraine and the Middle East.
Trane's financial model leans heavily on the idea that buildings everywhere need to become more energy efficient and that the products required to do that will continue to generate strong demand for years. The company calls this the decarbonization of the built environment. That framing shapes almost every strategic decision, from the BrainBox AI acquisition to the refrigerant compliance spending to the Gigaton Challenge sustainability goal of reducing customer emissions by one billion metric tons by 2030. Whether that demand holds up through economic downturns, rising interest rates, or slower construction activity is the central variable the numbers cannot yet answer.