HVAC DESIGN MANUAL 02-00
Attachment No. 6
Climatic conditions for the Department of Veterans Affairs
DESIGN TEMPERATURES
EQUIPMENT
ON GRADE
20FT FLOOR SPAN
30FT FLOOR SPAN
40FT FLOOR SPAN
50FT FLOOR SPAN
BASE
ISOL
MIN
BASE
ISOL
MIN
BASE
ISOL
MIN
BASE
ISOL
MIN
BASE
ISOL
MIN
TYPE
TYPE
DEFL
TYPE
TYPE
DEFL
TYPE
TYPE
DEFL
TYPE
TYPE
DEFL
TYPE
TYPE
DEFL
BASE MOUNTED:
UP TO 10 HP
---
---
---
---
D,L,
---
---
D,L,
---
---
D,L,
---
---
D,L,
---
W
W
W
W
15 HP THRU 40 HP
I
S
1.0
I
S
1.0
I
S
1.7
I
S
1.7
I
S
1.7
50 HP & OVER
I
S
1.0
I
S
1.0
I
S
1.7
I
S
2.5
I
S
2.5
ROOF VENTILTORS
ABOVE OCCUPIED AREAS:
5 HP & OVER
---
---
---
CB
S
1.0
CB
S
1.0
CB
S
1.0
CB
S
1.0
CENTRIFUGAL BLOWERS
UP TO 50 HP:
UP TO 200 RPM
B
N
0.3
B
S
2.5
B
S
2.5
B
S
3.5
B
S
3.5
201 - 300 RPM
B
N
0.3
B
S
1.7
B
S
2.5
B
S
2.5
B
S
3.5
301 - 500 RPM
B
N
0.3
B
S
1.7
B
S
1.7
B
S
2.5
B
S
3.5
501 RPM & OVER
B
N
0.3
B
S
1.0
B
S
1.0
B
S
1.7
B
S
2.5
60 HP & OVER:
UP TO 300 RPM
B
S
1.7
I
S
2.5
I
S
3.5
I
S
3.5
I
S
3.5
301 - 500 RPM
B
S
1.7
I
S
1.7
I
S
2.5
I
S
3.5
I
S
3.5
501 RPM & OVER
B
S
1.0
I
S
1.7
I
S
1.7
I
S
2.5
I
S
2.5
COOLING TOWERS
UP TO 500 RPM
---
---
---
---
SP
1.0
---
SP
1.7
---
SP
2.5
---
SP
3.5
501 RPM & OVER
---
---
---
---
SP
1.0
---
SP
1.0
---
SP
1.7
---
SP
2.5
INTERNAL COMBUSTION ENGINES
UP TO 25 HP
I
N
0.3
I
N
0.3
I
S
1.7
I
S
2.5
I
S
2.5
30 THRU 100 HP
I
N
0.3
I
N
1.7
I
S
2.5
I
S
3.5
I
S
3.5
50
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