If you need an 80-gallon gas water heater, the American Standard D-80-125-AS is the only listed product that directly matches both the fuel type and tank size. The Rheem RTG is a gas alternative for buyers who prefer tankless operation, while the Rinnai and Senville are electric heat-pump options rather than gas heaters. The Rheem 50-gallon model is also electric and smaller than 80 gallons. Compare the fuel, capacity, installation type, and listed limitations before choosing.
| Product | Type and capacity | Best suited for |
|---|---|---|
| American Standard D-80-125-AS | Natural gas, 80-gallon tank | Buyers seeking the closest match to the search |
| Rheem RTG Series | Natural gas, tankless | Homes considering on-demand hot water |
| Rinnai REHP80 | Electric heat pump, 80 gallons | Buyers open to an electric alternative |
| Senville Hybrid | Electric heat pump, 50 gallons | Households comparing hybrid heat-pump options |
| Rheem PROE50 | Electric tank, 50 gallons | Buyers needing a smaller electric replacement |
American Standard D-80-125-AS
This commercial water heater is the most direct match for a buyer searching for an 80-gallon gas model. Its listed specifications include natural gas operation, an 80-gallon tank, 80% thermal efficiency, and 121 gallons per hour at a 100-degree temperature rise.
Best for: Buyers who specifically need an 80-gallon natural gas tank and want a stated recovery-output figure for comparison. It was selected because it is the only product in this list that matches both the requested fuel and tank capacity.
Limitation: The product name states that it is not California compliant. Buyers in California should check applicable local requirements and product eligibility before purchasing. The commercial designation also makes it important to confirm that this model suits the intended installation.
Rheem RTG Series Natural Gas Tankless
This is a gas alternative, not an 80-gallon storage heater. The listing describes an outdoor, non-condensing tankless unit rated at 180,000 BTU per hour, with a stated flow of 8.4 gallons per minute at a 35-degree temperature rise. It has a listed Uniform Energy Factor of 0.82.
Best for: Buyers who want natural gas and are considering on-demand hot water instead of a large storage tank. The listed flow rate and gas input help shoppers compare it with household demand.
Limitation: It does not store 80 gallons, and actual flow depends on the temperature rise. The product listing specifies outdoor installation and recommends mounting by a qualified installer, so it is not a direct replacement for every tank configuration.
Rinnai REHP80 Electric Heat Pump
The Rinnai REHP80 is an 80-gallon electric heat-pump water heater, not a gas model. The supplied product name lists 240 volts and 30 amps. Its features describe heat drawn from ambient air, Energy Star certification, demand-response capability, and up to 91 gallons of first-hour delivery.
Best for: Buyers who need an 80-gallon capacity but are willing to consider electric heat-pump technology. It was included because its tank size matches the search, even though its fuel does not.
Limitation: This model does not use gas. The supplied name gives a UEF of 4.00, while the feature text gives 3.90; verify the current specification before comparing efficiency. The listing also does not provide installation-space details in the supplied information.
Senville 50-Gallon Hybrid Heat Pump
This Senville model is a 50-gallon electric hybrid heat-pump water heater, so it differs from an 80-gallon gas tank in both fuel and capacity. Listed specifications include a 3.75 UEF, a 69-gallon first-hour rating, and 4.5 kW. The product features describe heat-pump operation that draws warmth from surrounding air.
Best for: Households comparing a smaller electric hybrid option, especially when an 80-gallon gas tank is not essential. Its first-hour rating offers a useful point of comparison with other tank models.
Limitation: Its 50-gallon capacity may not meet the needs of buyers specifically seeking 80 gallons. It is electric, not gas, and the listing’s energy-use savings statement should be evaluated against the buyer’s existing heater and local conditions.
Rheem PROE50 50-Gallon Electric Tank
The Rheem PROE50 is a residential electric tank water heater with a 50-gallon capacity. Its listed features include an enhanced-flow brass drain valve, an automatic thermostat, and an anode rod. The product description says it is intended for households with three to five people or homes with three or more bathrooms.
Best for: Buyers comparing a conventional electric replacement rather than an 80-gallon gas model. It was selected as a related option because it provides a tank-style alternative with household sizing guidance in the listing.
Limitation: This is a 50-gallon electric heater, not an 80-gallon gas unit. Do not treat the household guidance as a guarantee of capacity for a particular home; usage patterns and installation requirements matter.
Buying Guide: How to Choose an 80-Gallon Gas Water Heater
Do you need gas and an 80-gallon tank?
Confirm both requirements before comparing secondary features. Of the listed products, only the American Standard is an 80-gallon natural gas tank. The Rheem RTG uses natural gas but is tankless. The other three models are electric, and two have 50-gallon capacities.
How should you compare hot-water output?
For a tank heater, compare capacity and recovery information. The American Standard listing states 121 gallons per hour at a 100-degree rise. For the tankless Rheem, consider its 8.4 GPM figure at a 35-degree rise; flow changes with the incoming-water temperature and desired output temperature. First-hour ratings on electric tanks are another useful comparison point, but they are not the same as tank capacity.
What should you check before installation?
Verify the fuel supply, available electrical service when applicable, venting or outdoor placement, physical space, and local building rules. The American Standard listing identifies a California compliance limitation. The Rheem tankless model is specified for outdoor installation. Have a qualified professional confirm whether the selected model can be installed safely and legally at your property.
Is an electric heat pump a reasonable alternative?
It may be worth comparing if you can use electricity instead of gas and have a suitable installation location. The Rinnai is the only listed electric heat-pump model with an 80-gallon capacity. The Senville is a smaller 50-gallon hybrid model. Compare stated efficiency and first-hour delivery, while confirming current specifications and installation needs.
Frequently Asked Questions
Which listed product is an 80-gallon gas water heater?
The American Standard D-80-125-AS is the only listed product described as both an 80-gallon tank and a natural gas water heater.
Is the Rheem RTG an 80-gallon water heater?
No. It is a natural gas tankless water heater, so it does not store 80 gallons.
Is the Rinnai REHP80 a gas model?
No. The Rinnai REHP80 is an electric heat-pump water heater with an 80-gallon capacity.
What does the American Standard listing say about California?
Its product name states “Not CA Compliant.” California buyers should verify current local requirements before purchase.
Can a 50-gallon heater replace an 80-gallon model?
Not necessarily. The right capacity depends on household demand, usage timing, and the heater’s output. Compare those needs with the product’s capacity and first-hour or recovery information before selecting a smaller tank.