Haw. Code R. § 11-39-8 - Outdoor air supply
(a) The outdoor air
shall be taken from a clean, uncontaminated source.
(b) Outdoor air shall be ducted to the air
conditioning or ventilating apparatus, or mixed with recirculating air in a
plenum. Wherever the outdoor air duct is not connected to the apparatus, the
mixing plenum shall be properly engineered and free from air contamination
sources.
(c) All outdoor air
intakes shall be screened and shall be located as far as possible from stacks
and vent outlets, but this distance shall in no case be less than twelve feet
(three and five-tenths metres). Domestic clothes dryer vents shall not be
considered as outlets for this purpose. The distance in each case shall be
sufficient to prevent the discharged air from entering the outdoor air intake.
(1) All outdoor air intakes shall be located
to be readily accessible for cleaning and shall be kept in a clean and sanitary
condition.
(2) Openings for outdoor
air intake shall be designed so that the air face velocity at the intake does
not exceed one thousand feet per minute (five metres per second).
(d) The outdoor air from air
conditioning systems shall be supplied through a conditioning apparatus
directly to each given space during its occupied hours, and the quantity shall
conform to the requirements of ASHRAE Standard 62. There shall be an exception
to this for occupancies such as hotel guestrooms, apartments, or dormitories
where air conditioning is provided within separate tenancies of a multi-room
housing type facility, and where openable window air ratio to floor area is
provided in accordance with administrative rules and building codes, no outdoor
air intake shall be required. This exception should not apply to nursing homes,
hospitals, or similar medical facilities.
(1)
Outdoor air quantities for ventilation systems shall be provided by means of
supply or exhaust fans, and shall conform to the requirements of ASHRAE
Standard 62.
(2) The volume of
outdoor air provided for sparsely-occupied areas other than those specifically
named herein, shall not in any case be less than five hundredths cubic feet per
minute per square foot (twenty-five hundredths liter per second per square
metre) of floor space.
(3) The
outdoor air rate for uses or occupancies other than those specifically named in
ASHRAE Standard 62 shall be by agreement between the designer and the
director.
(4) If agreed between the
designer and the director, a particular occupancy in which tobacco smoking is
illegal and does not occur, may have reduced outdoor air requirements, where
based on a specified amount per person in ASHRAE Standard 62, by seventy-five
per cent, provided a minimum of five cfm per person (two and five tenths liters
per second per person) is provided.
(5) Use of activated carbon or other
odor-removing means shall not be considered to reduce the required minimum
outdoor air quantities.
Notes
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