heating, ventilation and air conditioning overview
TRANSCRIPT
Goals
Understand purpose of ASHRAE 170 guidelines
Knowledge of requirements for most common healthcare spaces/systems
Know where to look for further information.
Wisconsin AdoptionSPS 364.0202 Definitions. (d) “Health care facility” means a hospital, nursing home, outpatient surgical facility, or community−based residential facility.
SPS 364.0300 Health care facilities.
(1) This is a department rule in addition to the requirements in IMC chapter 3: In addition to the requirements in chs. SPS 361 to 366, the heating and ventilation systems for health care facilities only shall conform to the applicable provisions of FGI Guidelines for Design and Construction of Hospitals and Outpatient Facilities 2014, except as provided in sub. (2).
(2) (a) The requirements in parts 1 and 5 of FGI guidelines are not included as part of this chapter. (b) This is a department rule in addition to the requirements in part 6 of the FGI guidelines: Addenda a, b, d, e and f for ASHRAE 170 are included as part of this chapter, except as provided in sub. 2.
ASHRAE 170 -
Ventilation of
Healthcare FacilitiesThe purpose of this standard is to define
ventilation system design requirements that
provide environmental control for comfort,
asepsis, and odor in healthcare facilities.
6.1.1 Ventilation Upon Loss
of Electrical Power
AII rooms
PE rooms
Operating rooms (including C-section)
6.1.2 Heating and Cooling
Sources
N+1 redundancy for domestic hot water and building heat
Systems >400 tons to have N+1 redundancy to support “owner’s facility
operation plan”
6.3.2 Exhaust
AII, bronchoscopy, ED waiting, nuclear medicine lab,
radiology waiting rooms, and chemical fume hoods:
Interior ductwork under negative pressure
10’ vertical discharge
Minimize recirculation into building
6.8 Energy Recovery
Upstream of Filter Bank No. 2
No AII rooms (except run-around coils)
5% leakage limit for energy wheels
Exhaust streams that may not be used ER waiting, triage, etc. (6.8.3)
7.1 General Requirements
Minimum air changes can be either supplied for positive pressure rooms or
exhausted for negative pressure rooms
Minimum outdoor air is the sum of individual space requirements
7.2.1 Airborne Infection
Isolation (AII) Rooms
-0.01” w.c. relative to surrounding spaces
Continuous pressure monitoring
Exhaust near patient head
Can only mix exhaust air with AII toilet room and ante room
No non-AII rooms
7.2.2 Protective
Environment (PE) Rooms
+0.01” w.c. relative to surrounding spaces
Continuous pressure monitoring
Supply near patient bed
Return/exhaust near door
7.2.3 Combination AII/PE
rooms
Supply near patient bed
Exhaust near door
Ante room that is either positive to all surrounding areas or negative to all
surrounding areas
7.4.1 Operating Rooms
+0.01” w.c. relative to surrounding spaces
Primary supply diffuser array above surgical table
(70% of area extending 12” around surgical table
must be diffusers)
Two low return/exhaust in opposite corners
7.4.3 Imaging Procedure
Rooms
Invasive procedures require room to meet requirements of:
Procedure rooms (minimum)
Operating rooms (if anesthetic gases are administered)