HVAC REQUIREMENTS IN TB ISOLATION ROOM S UITE
(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
Table 3-5
Ante Room (If provided)
25 (78) -50% RH
22 (72) - 30% RH
Table 3-5
Bathroom & Toilet
25 (78)
22 (72)
Table 3-5
2. Minimum Air Changes per Hour:
Area
Air Changes
HVAC Design Manual
Ref.
Bed Room
12
Table 3 -6
Ante Room (If provided)
12
Table 3 -6
Bathroom & Toilet
10 (No supply)
Para. 3.5
3.
The use of Ante room is not mandatory, however, its need should be discussed
3.22.4.5
with the facility.
4.
All air from bed room, ante room (if provided), bathroom & toilet should be
3.22
exhausted to outside through a dedicated exhaust system.
5.
Maintain negative pressure in bed room with respect to ante room. Maintain
3.22
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
3.22
terminal reheat.
7.
Provide an individual air flow control valve in each individual space exhaust
3.22
branch for control reason. See VA standard detail 15902-13.Dwg (Separate
negative and positive pressure rooms are required).
8.
The use of HEPA filters in the 100% exhaust from the TB isolation suite is not
CDC Guidelines
necessary, but its use should be considered wherever exhaust air could
possibly reenter the system. If HEPA filters are used, CDC requires them to be
maintained and monitored properly. DOP (DIOCTYL PHTHALATE) tests are
required initially and at time of their replacement. The tests should be repeated
every six months of their use.
9.
Negative pressure in the bed room should be monitored daily while the room is
3.22.4.6
occupied.
10.
Exhaust fan for TB isolation suite is not required to be on emergency power.
3.22.4.5
Consult facility staff..
Contact Satish Sehgal @ 202-565-5032, Kurt Knight @ 202-565-4980, Don Walden 202-565-5014 or Sat
Gupta @ 202-565-5268 for additional information.
September 2001
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