Heating, ventilation, and air conditioning (HVAC) refers to systems that perform processes designed to regulate room temperature, humidity, and air flow in buildings, as per their acceptable range.
HVAC systems are an important part of:
• Architectural design and space allocations
• Building construction budget
Detailed report at: http://www.reportsandintelligence.com/global-procurement-of-hvac-systems-2014-2018-market