ANSI ASHRAE ASHE 170:2021 pdf download.Ventilation of Health Care Facilities.
2.1 The requirements in this standard apply to patient care areas, resident care areas, and related support areas within health care facilities.
2.2 ANSI ASHRAE ASHE 170 applies to new buildings, additions to existing buildings, and those alterations to existing buildings that arc identified within this standard.
2.3 ANSI ASHRAE ASHE 170 considers chemical, physical, and biological contaminants that can affect the delivery of medical care to patients and residents; the convalescence of patients and residents; and the safety of patients, residents, health care workers, and visitors.
2.4 ANSI ASHRAE ASHE 170 establishes design requirements for temperature and humidity.
2.5 ANSI ASHRAE ASHE 170 establishes design requirements for odor control and asepsis.
2.6 ANSI ASHRAE ASHE 170 establishes design requirements for ventilation rates, including, but not limited to, outdoor air to serve health care facilities.
2.7 ANSI ASHRAE ASHE 170 does not establish comprehensive thermal comfort design requirements.
3. DEFINITIONS
absorption distance: the distance downstream of a humidifier required for all moisture to be absorbed into the airstream.
addition: an extension or increase in floor area or height of a building, building system. or equipment.
airborne infection isolation (A11): the isolation of patients infected with organisms spread by airborne droplet nuclei less than 5 im in diameter. For the purposes of this standard, the abbreviation “All” refers to the room that provides isolation. (Informative Note: See FGI [201 8a, 2018b, 2018c], CDC [2003], and CDC [2005] in Informative Appendix E.)
airborne infecrioii isolatio,i (AII. room: a room that is designed according to the requirements of this standard and that is intended to provide airborne infection isolation.
alteration: a significant change in the function or size of a space, in the use of its systems, or in the use of its equipment. either through rearrangement, replacement, or addition. Routine maintenance and service shall not constitute an alteration.
authority having jurisdiction (4HJ): the agent or agency responsible for enforcing this standard.
average velocity: the volumetric flow rate obtained by dividing the air quantity issuing from an air distribution device by the nominal face area of the device.
building: a structure that is wholly or partially enclosed within exterior walls and a roof, or within exterior and party walls and a roof, and that affords shelter to persons. animals, or property. In this standard, a building is a structure intended for use as a hospital or health care facility.
Class 1 imaging room: diagnostic radiography, fluoroscopy, mammography, computed tomography (CT), ultrasound, magnetic resonance imaging (MRI), nuclear medicine, and other imaging modalities, including services that use natural orifice entry and do not pierce or penetrate natural protective membranes.
class 2 imaging rooni: diagnostic and therapeutic procedures such as coronary, neurological, or peripheral angiography, including electrophysiology, cardiac catheterization, and interventional angiography and similar procedures.
Class 3 imaging room: invasive procedures including cardiac stenting, implantation of devices in an invasive fluoroscopy, and any other Class 2 procedure during which the patient will require physiological monitoring and is anticipated to require active life support.
equipment: devices for heating, ventilating, and/or air conditioning, including but not limited to furnaces, boilers, air conditioners, heat pumps, chillers, and heat exchangers.
essential accessories: those components of a system, required to allow proper operation of that system, that are reasonably subject to mechanical failure (e.g., pumps, fans, control air compressors). Humidifiers, controls, and tanks are not included in this definition.ANSI ASHRAE ASHE 170 pdf download.