4.7 IECC requires ventilation in accordance with Chapter 4 of the 1996 International Mechanical Code. Minimum insulation levels for ductwork and piping. Shut off dampers for outside air dampers. Automatic temperature and humidity controls. The EAC Draft goes into additional details for complex systems in the same areas identified in IECC and the simple sections for the Massachusetts standard identified above.
Ventilation controls Outdoor air reset controls.
Heat recovery systems. Leak tests on ductwork with an operating pressure greater than 3 inches of Total Static Pressure. It was noted that some manufacturers do not always provide efficiency rating information in units consistent with the efficiency standards and associated rating points issued in CBES', which could create an enforcement issue. The EAC Draft technical standards are slightly higher than the IECC levels. The HVAC standards are similar to other regional standards.