- (01 - 29) -
D
U
C
T T
YP
E
AR
G
12
-1
8L
LT
B
D
U
C
T T
YP
E
AR
G
12
-1
8L
LT
B
MODEL
: AR
G18LLTB
HIGH
QUIET
Heating
z
O
ct
av
e b
an
d s
ou
nd p
re
ss
ur
e l
ev
el
, d
B:
(0
dB
=0
.0
00
2µ
ba
r)
Octave band center frequency,Hz
80
70
60
50
40
30
20
10
0
63
125
250
500
1,000
2,000
4,000
8,000
NC-65
NC-60
NC-55
NC-50
NC-45
NC-40
NC-35
NC-30
NC-25
NC-20
NC-15
HIGH
QUIET
Cooling
z
O
ct
av
e b
an
d s
ou
nd p
re
ss
ur
e l
ev
el
, d
B:
(0
dB
=0
.0
00
2µ
ba
r)
Octave band center frequency,Hz
80
70
60
50
40
30
20
10
0
63
125
250
500
1,000
2,000
4,000
8,000
NC-65
NC-60
NC-55
NC-50
NC-45
NC-40
NC-35
NC-30
NC-25
NC-20
NC-15