HVAC troubleshooting guide to help facilities managers and maintenance personnel solve indoor environment and energy or water consumption problems. It is a step-by-step guide to identifying indoor environmental quality problems that may be caused by the operation of the HVAC system. It allows managers in charge of HVAC facilities, particularly those without a technical background, to initiate investigations, follow their progress and perhaps perform a few simple checks. Also supplies a series of 14 troublshooting procedures for use by maintenance personnel actually performing the investigations. The IEQ problems covered by the procedures include: too hot, too cold, stuffy or still air, draughts, odours, noise from the HVAC system, dry eyes, throat or skin, lethargy, and headaches. The troubleshooting procedures can be purchased separately as a set of 14 sheets.