If you’re pursuing higher levels of certification and have a building automation system (BAS)A building automation system (BAS) uses computer-based monitoring to coordinate, organize, and optimize building control subsystems, including lighting, equipment scheduling, and alarm reporting. in place already, consider this credit. To earn it you’ll need to implement two forms of thermal comfort monitoring, including continuous monitoring of air temperature and humidity, and periodic measurements of air speed and radiant temperature.
Once you’ve confirmed that you have or can implement the required monitoring, the credit requires that you also determine acceptable boundaries for thermal comfort in the building based off of ASHRAE 55-2010 or one of two alternative international standards. That means that pursuing the credit requires some engineering expertise in order to set the appropriate boundaries and put a system in place to track and verify performance.
One bright note is that under LEED v4, humidity monitoring can now be at the system (air handler unit—AHU) level, rather than in all occupiable spaces as was required in LEED 2009. This should make the credit somewhat more feasible from a cost perspective.
The ISO and CEN standards are simply alternatives for determining acceptable ranges for thermal comfort in the building. So, applying one of these standards instead of ASHRAE 55-2010 won’t change the monitoring strategy that you need to have in place. However, the alternative standards may be more familiar to international teams and therefore could make the implementation process go more smoothly.
To promote occupants’ productivity, comfort, and well-being by providing quality thermal comfort.
Have a permanent monitoring system to ensure ongoing building performance to the desired comfort criteriaComfort criteria are specific design conditions that take into account temperature, humidity, air speed, outdoor temperature, outdoor humidity, seasonal clothing, and expected activity. (ASHRAE 552004), as specified by ASHRAE Standard 55–2010, Thermal Comfort Conditions for Human Occupancy, Section 5.2 or 5.3, with errata, or a local equivalent.
[India ACP: Thermal Comfort NBC]
Have a permanent monitoring system to ensure ongoing building performance of the desired comfort criteria, as specified by the applicable standard:
The monitoring system must meet the following requirements.
OPTION 1. ASHRAE 55–2010 OR THE NATIONAL BUILDING CODE OF INDIA 2005 (NBC 2005)
Projects in India may meet the desired comfort criteria specified in the following as a local equivalent to ASHRAE 55-2010:
a quick question regarding the locations of the sensors/measurements required for this credit.
As stated by Ashrae 55-2010, Air temperature
and air speed shall be measured at the 0.1, 0.6, and
1.1 m (4, 24, and 43 in.) and radiant asymmetry at 0.6 m (24 in.). I was wondering if these measurements are required for the permanent and continuous sensor system or just the periodic measurements for this credit? Otherwise, is it OK to have one sensor per each thermal zone installed at any height for at least the continuous monitoring system?
Thank you in advance!
In my experience, the measurement locations you cite from ASHRAE 55-2010 apply to the periodic measurements of air speed and radiant temperature but not to the permanent air temperature sensors. I think this is supported by the LEED reference guide language that states "at least one air temperature sensor must be installed for each thermal zone with occupied spacesEnclosed space intended for human activities, excluding those spaces that are intended primarily for other purposes, such as storage rooms and equipment rooms, and that are only occupied occasionally and for short periods of time. Occupied spaces are further classified as regularly occupied or nonregularly occupied spaces based on the duration of the occupancy, individual or multioccupant based on the quantity of occupants, and densely or nondensely occupied spaces based on the concentration of occupants in the space.. The sensors may be placed close to where the occupants are known to spend time. Sensors in the return air duct to the air-handling unit are not acceptable. Additional sensors are required if a single measurement point is not representative of the entire thermal zone because of its use or configuration, if a space includes both perimeter and core area, if a space can be subdivided (e.g., with a movable wall), or if other drivers of large air temperature variance are present."
How would one install data loggers to track thermal comfort in a dormitory?
Patricia, can you be more specific in your question?
We have installed the data loggers, but they are stand alone and are not connected to an alarm system. Could it be possible to achieve the credit by implementing a protocol that requires a constant review of the data which is then submitted to facilities to address any possible issue?
The rating system and reference guide language related to the alarm makes it seem to me that the intent is for the alarm to be automatic, rather than based on manual review of the data. Could the data loggers that you have indicate some sort of alarm, like a flashing light, if the conditions get outside of the acceptable range?
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