Variable Air Volume (VAV) System Market Size & Share, By Application (Commercial Buildings, Residential Buildings, Industrial Facilities, Healthcare Facilities, Educational Institutions), System Type (Constant Volume Systems, Variable Air Volume Systems, Dual Duct Systems, Multi-Zone Systems, Underfloor Air Distribution Systems), Control Type (Pneumatic Control Systems, Direct Digital Control Systems, Building Automation Systems, Wireless Control Systems, Cloud-Based Control Systems), Air Handling Unit - Growth Trends, Regional Insights (U.S., Japan, South Korea, UK, Germany), Competitive Positioning, Global Forecast Report 2025-2034