Water Heater Gas Tankless
A.O. Smith Adapt SC Mid-Efficiency Condensing
The Adapt SC Mid-Efficiency Condensing gas tankless water heater delivers on-demand hot water with a UEF of 0.95 and up to 199,000 BTU. Features X3® Scale Prevention Technology and flexible PVC venting. ENERGY STAR® certified. Available with integrated or optional-accessory X3 scale prevention in three BTU sizes.
UEF
0.95
Min BTU Input
10,000 BTU
Fuel
Natural Gas
Voltage
120V
Amperes
5A
Vent Material
ABS, PVC, CPVC, Polypropylene
Model Comparison
6 models
Integrated 
Optional Accessory | Specification | Integrated | Optional Accessory | ||||
|---|---|---|---|---|---|---|
| Model | ATM-160X3-N 100 | ATM-180X3-N 100 | ATM-199X3-N 100 | ATM-160M-N 100 | ATM-180M-N 100 | ATM-199M-N 100 |
| Max Flow Rate | 4.8 GPM | 5.4 GPM | 6 GPM | 4.8 GPM | 5.4 GPM | 6 GPM |
| Height | 40.41" | 40.41" | 40.41" | 32.46" | 32.46" | 32.46" |
Shared Specifications
All models| UEF | 0.95 |
| Min BTU Input | 10,000 BTU |
| Fuel | Natural Gas |
| Voltage | 120V |
| Amperes | 5A |
| Vent Material | ABS, PVC, CPVC, Polypropylene |
| Flue Diameter | 2" |
| width_in | 17.12" |
| Water Connection | 3/4 in |
| Connection Location | Bottom |
| shipping_weight_lbs | 93 lbs |
| Emissions | Ultra-Low NOx |
| ENERGY STAR® | Yes |
| Installation | Indoor or outdoor (outdoor kit sold separately) |
| warranty_heat_exchanger_years | 15 yr |
| warranty_parts_years | 5 yr |
| Recirculation Pump | Integrated (X3 models) / Not included (M models) |