Local Pickup FAQ's
+
Share This Product
Recommended Accessories
Expert Recommended Accessories
Selected by Ken, our Expert
Required Accessories
9
These accessories are required to properly setup/install this product.
Optional Accessories
10
Features
Product Video Disclaimer: "PED is not responsible for any variances from the product in this video and the item you purchase. Please review all product specs prior to purchase."
- Pressurized Combustion System
- The Effex line features an atmospheric vent system, which allows the unit to distribute an optimal air-to-gas mixture, resulting in one of the most efficient gas powered water heaters on the market.
- Electronic Gas Control
- Designed with optimized performance in mind, the GAHH-40 uses intelligent control logic to control the flow of fuel into the unit. This means better performance and a more efficient heating rate.
- User-Friendly Electronic Interface
- A built-in easy to read controller on the unit gives you easy access to temperature settings, operating mode, and multiple diagnostics to make sure your unit is running exactly how you want it.
- Dynaclean Diffuser Dip Tube
- The diffuser dip tube helps reduce lime and sediment buildup by redirecting incoming cold water to create turbulence. Helping your unit to run longer and better.
- Powered Anode Rods
- These hot water heaters feature powered anode rods which are non-sacrificial, so they do not deplete over time. This also allows them to operate in all water conditions.
A.O. Smith continues to lead the way in residential and commercial water heating with close to 70 years of innovative hot water solutions. The GAHH-50 features the latest in atmospheric-vented water heating, making it an ideal choice for those looking to replace out of date, inefficient water heaters. A patented pressurized combustion chamber and advanced air intake blower helps deliver an optimal air-to-gas mixture, giving you top of the line water heating efficiency. This results in a .70 Uniform Energy Factor and more dollars in your pocket. The 50 gallon tank and 43 gallon per hour recovery rate mean it can easily keep up with the hot water needs of an average household.
California residents see
WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm..
For more information go to: www.p65Warnings.ca.gov
Specifications
GAHH-50
General Information
Type
Gas Water Heater
Product Line
Effex
Delivery Options
Ship
Medium
Medium
Medium refers to the substance that carries heat through the heating system. Systems are either designed to use either Hot Water or Steam as a medium, and components are usually specific to one or the other.
Hot Water
Fuel Type
Fuel Type
To create heat, some form of fuel is required. Fuel Type specifies what the product uses as an input to create heat.
Natural Gas
Vent Type
Vent Type
Products that use combustion (burning) of fuel to create heat also create potentially dangerous gasses that need to be exhausted (AKA "Vented"). Depending on the product, venting can be done via a chimney, through a side wall, or use a second vent to provide fresh air to the appliance.
Atmospheric
Storage Type
Tank
Mount Type
Floor
Maximum Altitude
10100 Feet
UPC
9211950000
Performance
Maximum Input Capacity
Maximum Input Capacity
The Maximum Input Capacity describes how quickly the appliance will use fuel when delivering it's maximum capacity. The units may change depending on the fuel being used.
40000 BTU
First Hour Delivery
First Hour Delivery
Sometimes called First Hour Rating, this is the number of gallons of hot water the heater can supply per hour when starting with a fully heated tank. The recovery of the water heater depends on your boiler's BTU and boiler output temperature.
81 Gallons
Continuous Recovery Rate
43 Gallons
Uniform Energy Factor
Uniform Energy Factor
Uniform Energy Factor (UEF) is a measurement of water heater energy efficiency. The higher the energy factor, the more efficient the water heater.
0.72
Low NOx Emissions
Low NOx Emissions
NOx is a byproduct of the combustion process, and it's output is regulated in some jurisdictions. Many regulators mirror SCAQMD rules, which regulate air quality for some parts of Southern California. Low NOx appliances emit less than 40 ng/J (nanogram per Joule) of NOx. Learn More
Yes
Electrical Data
Voltage
120 Volts
Phase
1
Frequency
60 Hz
Dimensions
Storage Volume
50 Gallons
Primary Vent Pipe Diameter
4 Inches
Cold Water Inlet
3/4 Inch
Hot Water Outlet
3/4 Inch
Product Height
60 5/8 Inches
Product Width
22 Inches
Product Depth
22 Inches
Product Weight
171 Pounds
Certifications
Energy Star Listed
Yes
CSA Listed
Yes
AHRI Certified
Yes
AHRI Reference Number
2110398
Warranty Information
Parts Warranty
Parts Warranty
A warranty is a safeguard from defects in manufacturing and can vary in length and terms. Some manufacturers require registration for extended warranty benefits, be sure to check out features and the warranty document. To see the manufacturer's warranty statement, click on the Manuals tab. Learn More
6 Years
Reviews
A.O. Smith GAHH-50 Reviews & Ratings
Be the First to Write a Review
Do you own this product?
Please share your insights with fellow shoppers.
Please share your insights with fellow shoppers.
How-To Articles
What Size Tankless Water Heater Do I Need
Size matters when it comes to your tankless water heater. In fact, it is t...
Signs You Need a New Water Heater
You’ve heard the stories. A 60-gallon hot water heater tank ruptures, flo...
An Intro to Indirect Water Heaters
If you heat your home with a boiler, you have the opportunity to get the most e...
Manuals
Ask A Question!
*Required Fields
+
Thank You For Submitting Your Question
Your submission has been sent successfully. Please give our experts up to two business days to respond.
Media Gallery
A.O. Smith 0.72 UEF NG Water Heater Atmospheric
Customer Review Images