CHANTILLY, Va. - The basics of HVAC systems and how they work are explained in the Sheet Metal and Air Conditioning Contractors’ National Association’s (SMACNA’s) new manual,HVAC Systems: Understanding The Basics. The manual, free to members, provides an overview of HVAC systems, the interrelationships between the various subsystems and components, and shows how the subsystems and components work.

SMACNA said this manual will assist HVAC contracting firms’ field and office personnel in gaining a thorough understanding of HVAC systems and will also be helpful to general contractors, construction management firm personnel, and specialty contracting companies, such as electrical contracting firms, that work with HVAC contractors.

HVAC Systems: Understanding the Basicsis available to SMACNA members for free download on the Project Management section of the Members Only page of the association’s Website at

CDs of the manual may be purchased at the following prices: SMACNA member price $31, discounted price for architects and engineers $129, non-member contractor price $185.

Publication date:07/27/2009