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WACs > Title 388 > Chapter 388-107 > Section 388-107-1000











388-107-0990    

388-107-1001







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WAC 388-107-1000









Mechanical—Ventilation systems.









The facility must ensure: (1) Ventilation of all rooms is designed to prevent objectionable odors, condensation, and direct drafts on the residents; (2) All habitable space is mechanically ventilated including air supply and air exhaust systems; (3) Installation of air-handling duct systems according to the requirements of the International Mechanical Code and chapter 51-52 WAC; (4) Installation of supply registers and return air grilles at least three inches above the floor; (5) Installation of exhaust grilles on or near the ceiling; and (6) Outdoor air intakes located a minimum of twenty-five feet from the exhaust from any ventilating system, combustion equipment, or areas which may collect vehicular exhaust and other noxious fumes, and a minimum of ten feet from plumbing vents. The facility must locate the bottom of outdoor air intakes serving central systems a minimum of three feet above the adjoining grade level or, if installed through the roof, three feet above the highest adjoining roof level. (7) Minimum ventilation requirements meet the pressure relationship and ventilation rates per the following table:

PRESSURE RELATIONSHIPS AND VENTILATION OF CERTAIN AREAS

Function Area Pressure Relationship To Adjacent Areas1,2
Minimum Air Changes of Outdoor Air Per Hour Supplied To Room Minimum Total Air Changes Per Hour Supplied To Room All Air Exhausted Directly To Outdoors

RESIDENT CARE        

Resident room (holding room) ±      

Resident corridor ±      

Toilet room N      

Resident gathering (dining, activity) ± 2 4 Optional

DIAGNOSTIC AND TREATMENT   Optional 2 Optional

Examination room ± Optional 10 Yes

Physical therapy3
N 2 4 Optional

Occupational therapy3
N      

Soiled workroom or soiled holding N 2 6 Optional

Clean workroom or clean holding P 2 6 Optional

STERILIZING AND SUPPLY   2 6 Optional

Sterilizer exhaust room N 2 10 Yes

Linen and trash chute room N 2 4 Optional

Laundry, general3
±      

Soiled linen sorting and storage N Optional 10 Yes

Clean linen storage P Optional 10 Yes

SERVICE   2 10 Yes

Food preparation center3
± Optional 10 Yes

Warewashing room3
N Optional 2 Yes

Dietary day storage ±      

Janitor closet N 2 10 Yes

Bathroom N Optional 10 Yes

Personal services (barber/salon) N Optional 2 Yes


1/P=Positive N=Negative ± = Continuous directional control not required.
2/Whether positive or negative, pressure must be a minimum of seventy cubic feet per minute (CFM).
3/The volume of air may be reduced up to fifty percent in these areas during periods of nonuse. The soiled holding area of the general laundry must maintain its full ventilation capacity at all times. [Statutory Authority: Chapter 70.97 RCW. WSR 14-19-071, § 388-107-1000, filed 9/12/14, effective 10/13/14.]