Operating room HVAC setback is a proven strategy for saving energy in hospitals and ambulatory surgery centers by reducing the amount of air supplied to ORs when they are not in use. However, the design and operation of ORs place unique constraints on potential setback strategies. A successful solution must take into account the local climate, the facility type, and user needs, and it must adhere to applicable code requirements.

Many solutions are available, and each involves trade-offs between the level of control, complexity, and cost. This monograph outlines the possibilities to consider when researching an HVAC setback strategy for your ORs and provides questions to ask in determining the best approach for your particular situation.