Which statement best describes the relationship between ASHRAE 62.1 and energy codes?

• A. Energy codes are unrelated to IAQ and 62.1.
• B. 62.1 sets mechanical equipment sizing only.
• C. 62.1 and energy codes both influence building design; 62.1 promotes energy-efficient IAQ strategies.
• D. 62.1 replaces energy codes for all building standards.

Answer: (C)

Both energy codes and ASHRAE 62.1 shape how a building is designed, but they cover different goals that work together. Energy codes focus on overall energy performance of the building systems, aiming to reduce energy use. ASHRAE 62.1 focuses on indoor air quality, specifying outdoor air rates, filtration, and controls to ensure healthy and comfortable spaces. The best description is that they influence building design together, with 62.1 promoting energy-efficient IAQ strategies. This means you can meet IAQ requirements in a way that also considers energy impact, using approaches like demand-controlled ventilation and energy recovery to provide adequate ventilation while minimizing energy use. 62.1 does not replace energy codes; it complements them by detailing IAQ performance and controls that energy codes may need to accommodate.