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rETurn air & DuCTinG inSTallaTiOn rEQuirEMEnTS
Clr
MODElS
FrOnT
DD-17DSI
SEE *1
NT 12S
3/8"
NT 16S
3/8"
NT 20S
1"
NT 12SE
SEE *1
NT 16SE
SEE *1
NT 20SE
SEE *1
NT 24SP
0"
NT 30SP
0"
NT 34SP
0"
NT 40
1"
P 30
0"
P 40
1"
*1 - Special clearances for discharge grills. Refer to installation and instruction Manual.
*2 - Return air should be 142" if 4 ducts are used. May be reduced to 88" if 5 ducts are used.
NOTE: 0" clearance is to spacer (flanges)
Clr
Clr
Clr
Clr
TOp
bTM
baCK
lEFT
0"
0"
0"
0"
1"
0"
0"
1"
1"
0"
0"
1"
1"
0"
0"
1"
5/8"
0"
0"
5/8"
5/8"
0"
0"
5/8"
5/8"
0"
0"
5/8"
0"
0"
0"
1"
0"
0"
0"
1"
0"
0"
0"
2"
1"
0"
0"
2"
0"
0"
0"
1"
1"
0"
0"
2"
Clr
DuCTS
bTM DuCT
riGhT
rEQ'D
SQ inCh
0"
N/A
N/A
1"
2 - 4"
N/A
1"
2 - 4"
N/A
1"
2 - 4"
N/A
5/8"
N/A
N/A
5/8"
N/A
N/A
5/8"
N/A
N/A
1"
3 - 4"
48"
1"
3 - 4"
48"
2"
4 - 4"
48"
2"
4 - 4"
48"
1"
4 - 4"
48"
2"
4 - 4"
48"
TOp DuCT
l & r SiDE DuCT
SQ inCh
SQ inCh
N/A
N/A
N/A
25"
N/A
25"
N/A
25"
N/A
N/A
N/A
N/A
N/A
N/A
N/A
36"
N/A
36"
N/A
48"
N/A
48"
N/A
48"
N/A
48"
rETurn air
SQ inCh
N/A
55"
55"
55"
N/A
N/A
N/A
55"
55"
55"
113"
55"
113"
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