BOTTOM
TOP
LEFT SIDE FRONT RIGHT SIDE
GAS
CONNECTION
ELECTRICAL CONNECTION
LINE VOLTAGE
ELECTRICAL CONNECTION
LOW VOLTAGE
OPTIONAL
GAS CONNECTION
OPTIONAL LOW
VOLTAGE WIRING
OPTIONAL LINE VOLTAGE
WIRING
A
I
R
F
L
O
W
RETURN
AIR
SUPPLY
AIR
HOT
MODEL A B C D E F RIGHT SIDE BACK TOP FRONT VENT
5 14 13 27/32 10 5/8 ༃ 11 1/2 1 7/8 0 4༄ 01 36༅ 85 lbs.
7 17 1/2 16 11/32 12 3/8 ༃ 15 2 1/2 0 3༄ 01 36༅ 105 lbs.
10 21 19 27/32 14 1/8 ༃ 18 1/2 2 1/2 0 0 0 1 3 6༅ 120 lbs.
12 24 1/2 23 11/32 15 7/8 ༃ 22 2 1/2 0 0 0 1 3 6༅ 140 lbs.
15 24 1/2 23 11/32 15 7/8 ༃ 22 2 1/2 0 0 0 1 3 6༅ 150 lbs.
༃MAY REQUIRE 3" TO 4" OR 3" TO 5" ADAPTER.
4" ADAPTER INCLUDED WITH (-)801P UNITS.
༄MAY BE 0" WITH TYPE B VENT.
༅MAY BE 1" WITH TYPE B VENT.
FIGURE 4
UPFLOW/HORIZONTAL DIMENSIONS
Location
ST-A1220-04
REDUCED CLEARANCE (IN.)
Input A B C D E F
Left Right
Back Top Front Vent
Ship.
Side Side Wgts.
050 14 12
27
/32 10
5
/8 ➀ 11
1
/2 1
7
/8 0 4➁ 0 1 3 6➂ 85 lbs.
050 17
1
/2 16
11
/32 12
3
/8 ➀ 15 2
1
/2 0 3➁ 0 1 3 6➂ 105 lbs.
075 17
1
/2 16
11
/32 12
3
/8 ➀ 15 2
1
/2 0 3➁ 0 1 3 6➂ 105 lbs.
075 21 19
27
/32 14
1
/8 ➀ 18
1
/2 2
1
/2 0 0 0 1 3 6➂ 120 lbs.
100 21 19
27
/32 14
1
/8 ➀ 18
1
/2 2
1
/2 0 0 0 1 3 6➂ 120 lbs.
125 24
1
/2 23
11
/32 15
7
/8 ➀ 22 2
1
/2 0 0 0 1 3 6➂ 140 lbs.
150 24
1
/2 23
11
/32 15
7
/8 ➀ 22 2
1
/2 0 0 0 1 3 6➂ 150 lbs.
CLEARANCE TO COMBUSTIBLE MATERIAL (INCHES)
UPFLOW/HORIZONTAL MODELS
➀ May require 3” to 4” or 3” or 5” adapter.
4” adapter optional.
➁ May be 0” with type B vent.
➂ May be 1” with type B vent.
*See furnace spec sheet for model availability.