The 30% response requirement applies to regular building occupants. In a commercial building, these are defined as workers who have a permanent office or workstation, or who typically spend at least 10 hours per week in the building. For residential buildings, regular occupants also include everyone who lives in the building.
To achieve the required 30% response rate, you don’t have to distribute the survey to all occupants. It’s worth considering, though, in order to maximize your response rate and to get a variety of feedback.
Distribute the occupant comfort survey at least once during the performance period to a representative sample of building occupants. Be sure to survey occupants working in all major space types and from a variety of areas within the building.
Thermal comfort monitoring may uncover minor issues that require corrective action. Maintenance costs will vary from building to building depending on the mechanical systems that are in place. Tracking of system performance can be handled in-house at minimal cost.
Communicate with relevant building personnel and ensure that they understand the procedures for delivering prompt adjustments or repairs in response to system alarms or occupant complaints.
Trend the data for air temperature and humidity on an ongoing basis. This is not required for the credit, but will help confirm that conditions are falling within acceptable ranges. (See the Documentation Toolkit for an example.)
You can take the measurements at any time during the year, as long as it represents normal conditions with normal building occupancy. For example, periodic measurements in an office should be taken during occupied weekday hours, not weekends or holidays when people aren’t around.