Heating, ventilating, and air conditioning (HVAC) designs seek to provide thermal comfort, acceptable indoor air quality, reasonable installation and maintenance costs, and efficient operation. In addition to facility temperature control, HVAC systems provide ventilation, reduce air infiltration, and maintain pressure relationships between spaces. HVAC design is based on the basic principles of heat transfer, thermodynamics, and fluid mechanics.
Facility HVAC system design requires an intimate knowledge of the building structure and function.
This typically involves an engineering analysis of the building’s envelope interior spaces, and functional use. The analysis considers the local climate conditions to determine the external thermal energy along with the internal thermal energy created by the people, lights, and equipment in the spaces. This establishes the peak heat losses gains that are then balanced through heating and cooling systems respectively. Based on the thermal analysis, facility type, and project budget, the HVAC system type selected, equipment defined, and the system designed and specified to integrate into the building.
While meeting the minimum building code requirements, PTA Engineering also designs HVAC systems to meet standards published by the American Society of Air Conditioning and Refrigeration Engineers (ASHRAE).
These standards were established to support the industry and encourage high standards and achievement.