HVAC Procedure and Performance Guide

TASK: Determining job specifications.

Training for this procedure can be found in these courses:

          301 – Performing the Comprehensive Building Assessment   and   221 – Indoor Air Quality Basics


Determine specifications for a system that will meet interior requirements for environmental control economically and dependably.


  1. Collect information as directed:
    1. Physical data (surface area, construction details, prevailing winds, etc.).
    2. Occupancy data (number of occupants and activities, etc.).
    3. Heat added to spaces by lighting.
    4. Heat added to spaces by appliances and equipment, etc.
  2. Calculate space heating loads including:
    1. Areas.
    2. Infiltration.
    3. Heat transfer. coefficients.
    4. Equipment heat additions.
    5. Occupancy loads.
  3. Document information and calculations.