The industrial air make-up system market is estimated at USD 2,760.7 million in 2026, is projected to reach USD 5,085.7 million by 2036 and is forecast to register a 6.3% CAGR between 2026 and 2036. In 2026, direct-fired MAUs holds 44.0% of unit type demand and 5,000-20,000 cfm represents 49.0%.