HVAC Requirements in Radiation Therapy

HVAC REQUIREMENTS IN RADIATION THERAPY

(REFER TO VA DESIGN GUIDE, RADIATION THERAPY, FOR ADDITIONAL INFORMATION)

1. Indoor Design Conditions:

Area

Summer

Winter

HVAC Design

Degree C

Manual Ref.

(Degree F)

Radiation Therapy

24(76) 50% RH

25(78) 30% RH

Table 1-1

(Linear Accelerators)

2. Maintain negative pressure in Radiation Therapy

Table 1-4

3. See VA Design Guide for:

Treatment Planning,

Superficial Therapy Unit,

OrthovoltageTherapy Unit,

SupervoltageTherapy Unit,

Megavoltage Therapy Unit (10MeV)

Mold Room, and

Treatment Planning and Computer Room

4. Maintain NC-35 to 40 depending upon use of the space

1.3.12

5. Filtration: Pre-filters 30%, and After-filters 85%

Table 2-1

6. Dedicated exhaust for biological safety cabinets and canopy

2.11.3

hoods.

7. Emergency power requirements for hoods and exhaust fans, and

2.16

closed loop water chilling equipment for linear accelerators.

8. Lead wrapping of duct work penetrating lead lined walls.

3.19.2

9. Requirements for Linear Accelerators

3.15

Contact Satish Sehgal @ 202-565-5032, Kurt Knight @ 202-565-4663, Don Walden 202-565-5014 or Sat Gupta @

202-565-5268 for additional information.

September 2001