This paper presents an advancement in HVAC system analysis, which is predicated on the electrical analogy to fluid systems. An integrated description or a building's HVAC system and rooms is constructed and may be used to support system testing and balancing, system performance analysis, capacity verification testing, and room interactions. Additional system simulation is useful to assess plant modifications and their impact on HVAC performance. This method is applicable to any facility with a large or complex HVAC system configuration.

Arbitrary energy conservation tactics have caused numerous environmental problems in all types of buildings. HVAC testing and adjusting can help solve them

Until the late 1950s, virtually no firms specialized exclusively in testing, adjusting, and balancing the components of heating, ventilating, and air-conditioning (HVAC) systems. The balancing, if performed at all, was done by the HVAC contractor, who lacked the necessary expertise required for advanced testing and balancing. After installation, many design engineers found that their systems were not working, not because of flawed design but because of improper balancing or deficient performance of the equipment.

The paper is concerned with the procedure for regulating or balancing a ventilation· system, so as to ensure that each outlet supplies or extracts its proper quantity. It deals with methods, organisation instrumentation and recording of results; it also discusses the accuracy required and attainable in ordinary practice. The advocated method of regulating consists of balancing the proportions of air flow at the junctions of a system, dealt with in a routine order, followed by the adjustment of the complete system to design volume by a final setting at the fan.