Rev. 13 November 1, 2016
Page | 6823 30 00 HVAC Air Distribution- Isolation Rooms
a. Label the exhaust air duct from isolation rooms at intervals of 50 feet. Also label each isolation room
exhaust fan, motor controls and any VFDs as such.
b. Arrange the duct systems for isolation rooms to include flow tracking (for pressurization control) via
the use of TABs on both the incoming supply air and the leaving exhaust or return air ducts.
c. Isolation rooms shall have direct drive exhaust fans.
d. The return or exhaust intakes from isolation rooms shall be installed at floor level.
e. The room pressure controller for isolation rooms shall be a TSI model 8630 with a non-flashing display.
f. Isolation rooms shall have either neutral/negative switching or neutral/positive switching; negative/positive
switching is prohibited.
g. Ceiling diffusers with integral HEPA filters (in lieu of installing above-ceiling in-line
HEPA filters) shall be used for positive pressure isolation rooms.
h. Locate all ceiling diffusers such that they do not interfere with the wall-mounted inlet for the room pressure
controller.
23 31 00 HVAC Ducts and Casings23 31 13 Rigid Metal Duct S ystems- Show pr essure classification of all duct systems on both the de sign doc uments and the ductwork s hop
dr awings. - Seal all duct jo ints and seams t o minimize duct leakage.
- Spe cify the acceptable leakage crite ria for each duct system. Specify pressure testing of all newly-installed duct
mains for leakage prior t o placing into service. - Design all duct support systems, inc luding concrete inserts, hangers, rod s, etc., to support
4 times the calculated weight of the duct section (and any adjacent fans). - Support all ducts directly from t he st ructure.
- Duct systems shall be cl ean/cleaned prior to a cceptanc e by the Owner.
23 32 00 Air P lenums- Floor-mounted plenums shall have full-height access doors.
23 33 00 Air Duct Accessories- Sound Attenuators
a. Specify sound attenuators wherever required on main air handling and exhaust systems.
b. Specify sound attenuators on the downstream side of all terminal air boxes.
c. Air handling units shall not be installed on the same floor as or in adjacent spaces to occupied spaces without
incorporating adequate sound attenuation materials into the intervening duct and wall construction.
23 33 13 Dampers- Fire/Smok e D ampe rs
a. F/S dampers shall b e prov ide with e nd switches.
b. Coordinate all control system voltages and smoke dampe r operator voltages.
Typically fire/smoke dampers are provided with 24 volt actuators.
c. F/S dampers shall be installed in a manner that is a ccessible for testing and inspection. - Fire D ampe rs