The records describe two separate market reports rather than one underlying event. MarketsandMarkets projects the global waste heat recovery market to increase from USD 92.99 billion in 2026 to USD 135.33 billion by 2031 at a 7.8% CAGR, while ResearchAndMarkets.com values the global water heating market at USD 143.1 billion in 2025 and forecasts USD 277.2 billion by 2035 at a 7.5% CAGR. Waste heat recovery growth is tied to industrial decarbonization, emissions rules and energy-intensive sectors, with Europe holding 38.0% of the market in 2025 and Asia Pacific forecast to grow fastest. Water heating growth is being supported by efficiency mandates, lower-emission equipment and connected technologies; residential applications represented 83.6% of that market in 2025.