Brochure
64
*For outdoor models, change “ATI” to “ATO”. For propane models, change “N” to “P”
**For propane models, minimum is 13,000
***For propane models, minimum inlet gas pressure is 8.0 in. W.C. and maximum inlet gas
pressure is 14.0 in. W.C.
† Cold climate represents 70°F temperature rise
‡ Warm climate represents 50°F temperature rise
Side viewFront view
13-7/8" (352mm)
4" (102mm)4" (102mm)
6-1/4" (158.5mm)
10" (254mm)
10-5/16" (262.2mm)
10-13/16" (274.6mm)
6" (152.1mm)
2-9/16" (64.8mm)
2-3/4" (70.2mm)
22-7/8 (580mm)
Gas 4/1/2" (113.7mm)
Hot 4-3/4" (121.1mm)
Condensate drain port
5-1/16" (129.1mm)
7-1/16" (180mm)
120VAC 3-1/16" (77mm)
Cold 1/2" (13.3mm)
Condensate drain port 3-1/4" (82.1mm)
Gas 4-1/8" (105.4mm)
Hot 6-1/2" (164.6mm)
Cold 7" (178.5mm)
120VAC 7-3/4" (196.5mm)
1" (25.5mm)
24" (609.4mm)
5-3/8" (137mm)
13-5/16" (338.1mm)
6" (152.1mm)
2-5/16" (58.4mm)
6-1/4" (158.5mm)
58.4
4-3/16" (106.1mm)
7-1/16" (179.2mm)
7-3/4" (197.2mm)
3-1/4" (82.8mm)
HOT 6-1/2" (165.3mm)
1/2" (13.3mm)
3-1/16" (77mm)
4-1/2" (113.7mm)
4-3/4" (121.1mm)
5-1/16" (129.1mm)
GAS
COLD
120VAC
Condensate drain port
Bo om view
Top view
INDOOR MODEL
Side view
Front view
13-7/8" (352mm)
10" (254mm)
10-5/16" (262.2mm)
22-7/8 (580mm)
Gas 4/1/2" (113.7mm)
Hot 4-3/4" (121.1mm)
5-1/16" (129.1mm)
Condensate drain port
7-1/16" (180mm)
Cold 1/2" (13.3mm)
Condensate drain port 3-1/4" (82.1mm)
Gas 4-1/8" (105.4mm)
Hot 6-1/2" (164.6mm)
Cold 7" (178.5mm)
1" (25.5mm)
5-3/8" (137mm)
7-1/16" (180mm)
5-3/8" (137mm)
2-9/16" (65.8mm)
1-11/16" (42.5mm)
3" (75.5mm)
8" (203mm)
10-3/4" (272.4mm)
120VAC 3-13/16" (96.1mm)
120VAC 1-7/16" (36.8mm)
13-5/16" (338.1mm)
Condensate drain port
GAS
COLD
HOT 6-1/2" (165.3mm)
3-1/4" (82.8mm)
4-3/16" (106.1mm)
7-1/16" (179.2mm)
1/2" (13.3mm)
4-1/2" (113.7mm)
4-3/4" (121.1mm)
5-1/16" (129.1mm)
1-7/16" (36.8mm)
Bo om view
Top view
OUTDOOR MODEL
INDOOR MODEL
OUTDOOR MODEL
Model
Number*
Type
Gas Consumption Input Inlet Gas Pressure***
Minimum**
(BTU/H)
Maximum
(BTU/H)
Minimum
(in. W.C.)
Maximum
(in. W.C.)
ATI-140H-N
Natural 15,000 120,000 4.0 10.5
Model
Number*
Energy
Factor
(EF)
Connections
Sizing Chart
(Number of Showers)
Water Gas
Cold
Climate†
Warm
Climate‡
ATI-140H-N
0.93 3/4” NPT 1/2” NPT 1.5 2.5
Model
Number*
Clearances (inches)
Approx Shipping
Weight (lbs)
Top Bottom Side Front
ATI-140H-N
12 12 3 4 52