HVAC REQUIREMENTS IN TB ISOLATION ROOM SUITE
(NEW CONSTRUCTION)
SEE VA PRIMER OF MAY,1997, FOR GRAPHIC INFORMATION
1. Indoor Design Conditions:
Area
Summer
Winter
HVAC Design
Degree C (Degree F)
Degree C (Degree F)
Manual Ref.
Bed Room
24 (76) - 50%RH
25 (78) - 30% RH
Application. A36
Ante Room (If provided)
25 (78) -50% RH
22 (72) - 30% RH
"
Bathroom & Toilet
25 (78)
22 (72)
"
2. Minimum Air Changes per Hour:
Area
Air Changes
HVAC Design Manual
Ref.
Bed Room
12
Application. A36
Ante Room (If provided)
12
"
Bathroom & Toilet
10 (No supply)
Para. 3.5
3.
The use of Ante room is not mandatory, however, its need should be
Application. A36
discussed with the facility.
4.
All air from bed room, ante room (if provided), bathroom & toilet should be
"
exhausted to outside through a dedicated exhaust system.
5.
Maintain negative pressure in bed room with respect to ante room. Maintain
"
negative pressure in ante room with respect to corridor. Maintain negative
pressure in bath room & toilet with respect to bed room.
6.
The supply air to the bed room and ante room shall be constant volume with
"
terminal reheat.
7.
Provide an individual air flow control valve in each individual space exhaust
"
branch for control reason. See VA standard detail 15900-7 and 7A, but
controls should be set up for isolation room Mode 1 only, and NOT MODE 2
FOR REVERSE ISOLATION.
8.
The use of HEPA filters in the 100% exhaust from the TB isolation suite is
CDC Guidelines
not necessary, but its use should be considered wherever exhaust air could
possibly reenter the system.
9.
Negative pressure in the bed room should be monitored daily while the room
Application A36
is occupied.
10.
Exhaust fan for TB isolation suite is not required to be on emergency power.
"
Consult facility staff..
Contact Satish Sehgal @ 202 565-5032, Kurt Knight @ 202 565-4980, Sat Gupta @ 202 565-5268, Wilbur
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Wright @ 202-565-5227, or Fred Lisi @ 202565-6273 for additional information.
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May 1997
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