Submittal Sheet

Page 2 of 4
AOSRG46836
Residential Gas
Tankless Water Heaters
All dimensions are in inches.
15-150 psi Water Pressure. 40 psi or above is recommended for maximum flow.
*Current numbers based on factory testing; 0.5 gpm required for activation; 0.4 gpm required for continuous fire after initial ignition.
Indoor models are certified from sea level to 10,100 ft. elevations.
In accordance with ANSI Z21.10.3, CO emission does not exceed 400 PPM for normal input.
The manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligation.
Model
Number
Type
Gas Consumption Input Inlet Gas Pressure
Energy
Factor
(EF)
Maximum
GPM*
Hot/Cold
Connections
Gas
Connection
Dimensions in Inches
Unit
Weight
(lbs)
Minimum
BTU/H
Maximum
BTU/H
Minimum
W.C.
Maximum
W.C.
Height Width Depth
Indoor Models
ATI-140H-N Natural 15,000 120,000 4.0 10.5 0.93 6.6 3/4" NPT 1/2" NPT 22-7/8 13-7/8 10-13/16 44
ATI-140H-P Propane 13,000 120,000 8.0 14.0 0.93 6.6 3/4" NPT 1/2" NPT 22-7/8 13-7/8 10-13/16 44
Outdoor Models
ATO-140H-N Natural 15,000 120,000 4.0 10.5 0.93 6.6 3/4" NPT 1/2" NPT 22-7/8 13-7/8 10-13/16 44
ATO-140H-P Propane 13,000 120,000 8.0 14.0 0.93 6.6 3/4" NPT 1/2" NPT 22-7/8 13-7/8 10-13/16 44