A.O. Smith Signature 100 40-Gallons Tall 6-year Warranty 35500-BTU Natural Gas Water Heater
Install this A. O. Smith Signature 100 Series atmospheric vent 40-gallon natural gas water heater in narrow spaces to preserve room in your home. Designed to provide efficient, reliable hot water for 3 to 4-person households when appropriately sized, this low NOx water heater features an environmentally friendly 35,500 BTU gas burner that delivers 65 gallons of hot water the first hour. The electronic gas valve not only ensures precise temperature control for optimum hot water delivery, and it also has an LED status indicator for easy diagnostics reporting and a push-button ignition to simplify the startup process. This A. O. Smith gas hot water heater has a built-in safety system that decreases the risk of accidental flammable vapor ignition. For added safety, this model also includes a factory-installed temperature and pressure relief valve and tamper-proof drain valve. This model is built to last. It features Tank Guard® which is designed to proivde ultimate tank protection and increase lifespan of the water heater. This added protection comes with a 6-year limited warranty for extra peace of mind. Call 1-877-GOLowes to get this water heater installed same day.
Highlights
- Delivers the ideal amount of hot water for households with 3 to 4 people when sized appropriately
- Features an environmentally friendly 35,500 BTU Low NOx burner that delivers 65 gallons in the first hour.
- Electronic gas valve provides precise temperature control for optimum hot water delivery
- Self-diagnostic electronic gas control incorporates an LED status indicator that monitors and reports on the system’s operational status
- Built-in safety system reduces the risk of accidental flammable vapor ignitions
- Tall, slim 61.75-in H x 20-in diameter profile enables easier installation in narrow spaces
- Tank Guard® provides advanced tank protection that extends the life of your gas water heater
- High-altitude certified from 0 ft to 10,100 ft
- Provides peace of mind with a 6-year limited tank and parts guarantee and a 1-year limited labor warranty
Specifications
| General | |||
|---|---|---|---|
| Series Name | Signature 100 | Type | Tank |
| Dimensions | |||
|---|---|---|---|
| Depth (Inches) | 23.75 | Rated Storage Capacity | 38-Gallon |
| Diameter (Inches) | 20 | Vent Diameter(s) | 3-in; 4-in |
| Family Size | 4 | Water Connection Size | 3/4-in |
| Height (Inches) | 61.81 | Weight (lbs.) | 135.75 |
| Insulation Thickness (Inches) | 2 | Width (Inches) | 20 |
| Nominal Capacity (Gallons) | 40 | ||
| Features | |||
|---|---|---|---|
| Annual Fuel Utilization Efficiency % (Percentage) | 0 | Pilot Light Window | Yes |
| BTU Rating | 35500 | Pilot Reset Button | Yes |
| Emission Rating | Low NOx | Point of Use | No |
| Foam Insulation | Yes | Power Source | Gas |
| For Use with Mobile Homes | No | Super High Efficiency | No |
| For Use with RVs | No | Temperature and Pressure Relief Valve | Yes |
| Fuel Type | Natural gas | Uniform Energy Factor | .59 |
| GPH Recovery at 90 Degrees F (Gallons) | 38 | Use Location | Indoor |
| Grade | Residential | Vent Type | Type B double wall |
| Grid Capable | No | Venting Type | Atmospheric |
| High Altitude Model | Yes | Water Connection Location | Top |
| Ignition Type | Piezo | Water Heater Style | Tall |
| Leak Detection | No | ||
| Compatibility | |||
|---|---|---|---|
| Bluetooth Compatibility | No | Works with Apple HomeKit | No |
| Smart Compatible | No | Works with iOS | No |
| Wi-Fi Compatibility | No | Works with SmartThings | No |
| Works with Amazon Alexa | No | Works with the Google Assistant | No |
| Works with Android | No | ||
| Warranty | |||
|---|---|---|---|
| Warranty | 6-year limited | ||
| Certifications | |||
|---|---|---|---|
| CA Residents: Prop 65 Warning(s) | Safety Listing | CSA safety listing | |
| ENERGY STAR Certified | No | ||
| Miscellaneous | |||
|---|---|---|---|
| UNSPSC | 40101800 | ||


























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