EQ Credit 6.2: Controllability of Systems: Thermal Comfort
1 Point
Intent
Provide a high level of thermal comfort system control by individual
occupants or by specific groups in multioccupant
spaces (i.e. classrooms or conference areas) to promote the
productivity, comfort and well-being of
building occupants.
Requirements
Provide individual comfort controls for 50% (minimum) of the
building occupants to enable adjustments to suit
individual task needs and preferences. Operable windows can be used
in lieu of comfort controls for occupants
of areas that are 20 feet inside of and 10 feet to either side of
the operable part of the window. The areas of operable
window must meet the requirements of ASHRAE 62.1-2004 paragraph 5.1
Natural Ventilation.
AND
Provide comfort system controls for all shared multi-occupant spaces
to enable adjustments to suit group needs
and preferences.
Conditions for thermal comfort are described in ASHRAE Standard
55-2004 to include the primary factors
of air temperature, radiant temperature, air speed and humidity.
Comfort system control for the purposes of
this credit is defined as the provision of control over at least one
of these primary factors in the occupant’s local
environment.
Potential Technologies & Strategies
Design the building and systems with comfort controls to allow
adjustments to suit individual needs or those
of groups in shared spaces. ASHRAE Standard 55-2004 identifies the
factors of thermal comfort and a process
for developing comfort criteria for building spaces that suit the
needs of the occupants involved in their daily
activities. Control strategies can be developed to expand on the
comfort criteria to allow adjustments to suit
individual needs and preferences. These may involve system designs
incorporating operable windows, hybrid
systems integrating operable windows and mechanical systems, or
mechanical systems alone. Individual adjustments
may involve individual thermostat controls, local diffusers at
floor, desk or overhead levels, or control of
individual radiant panels, or other means integrated into the
overall building, thermal comfort systems, and energy
systems design. In addition, designers should evaluate the closely
tied interactions between thermal comfort (as
required by ASHRAE Standard 55-2004) and acceptable indoor air
quality (as required by ASHRAE Standard
62.1-2004, whether natural or mechanical ventilation). |
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