Wash. Admin. Code § 51-11C-40621 - Section C406.2.1-Dwelling unit HVAC measures
C406.2.1
Dwelling unit HVAC controls. HVAC systems serving dwelling
units or sleeping units shall be controlled with a
programmable thermostat that is configured to automatically
activate a setback condition of at least 5°F (3°C) for both heating and
cooling. The programmable thermostat shall be configured to
provide setback during occupied sleep periods. The unoccupied setback mode
shall be configured to operate in conjunction with one of the following:
1. A manual main control device by each
dwelling unit main entrance that initiates setback for all
HVAC units in the dwelling unit and is clearly identified as
"Heating/Cooling Master Setback."
2. Occupancy sensors in each room of the
dwelling unit combined with a door switch to initiate setback
for all HVAC units in the dwelling within 20 minutes of all spaces being vacant
immediately following a door switch operation. Where separate room HVAC units
are used, an individual occupancy sensor on each unit that is configured to
provide setback shall meet this requirement.
3. An advanced learning thermostat that
senses occupant presence and automatically creates a schedule for occupancy and
provides a dynamic setback schedule based on when the spaces are generally
unoccupied.
4. An automated control
and sensing system that uses geographic sensing connected to the
dwelling unit occupants' cell phones and initiates the setback
condition when all occupants are away from the building.
Notes
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