hVac controls guide for Plans examiners and Building inspectors

Commercial buildingControl requirementsfor All SystemsThermostatic controlof heating & coolingVentilationSupply fanmotor controlHeat pumpsupplemental heaterp. 13p. 13p. 19p. 17p. 22Humidity controlp. 34PrescriptivePath?NoPerformance Pathp. 12YesSimple system?YesControl requirementsfor Simple Systemsp. 24NoPrescriptive requirementsfor Complex Systemsp. 28Prescriptive — An approach to satisfying the code requirements under which the design and constructionmust comply with the specific system and equipment parameters set forth in the code. This contrasts withthe performance approach to compliance, under which a certain amount of flexibility in those parameters isallowed, so long as the building utilizes less energy than a reference design.Simple system — A system that utilizes factory-assembled HVAC equipment, called packaged or unitaryequipment. In a simple system, one such unit is assigned to each zone. The exception to this is that the IECC alsoallows a heat-only system serving multiple zones to qualify as a simple system.Complex system — Also sometimes referred to as built-up, these systems include various components — chiller,cooling tower, boilers, pumps, fans, and more — that are assembled on site to form the building HVAC system.Once assembled, the system may serve multiple zones with heating and cooling.How to Use this Guide 5