Editor’s note: Originally published December 2020. Reviewed and updated November 2026. Some models mentioned here may have been updated or discontinued since; check current availability and specifications before buying.
The Rheem RTGH-95DVLN is an indoor, natural gas, condensing tankless water heater with a listed 94% efficiency, 199,000 BTU input and 9.5 gallons per minute of flow. Its main practical advantages are 1/2-inch gas line compatibility and low-cost PVC venting; the main limitation is a 120°F maximum temperature on residential settings.
If this will be your first tankless (on-demand) water heater, our tankless water heater pros and cons guide is a good primer.
Why consider a tankless water heater?
- Efficiency: a high-efficiency tankless unit heats water only when you need it, rather than keeping a tank hot.
- Space: compact wall-mounted designs take up less room than a traditional tank. Outdoor tankless models take no indoor space and avoid running a vent through an exterior wall.
- Water savings: adding a recirculation pump can cut the water wasted while waiting for hot water.
- Incentives: tax rebates or utility incentives are sometimes available when replacing a tank with a tankless unit; check what applies locally.
Rheem RTGH-95DVLN overview
The RTGH-95DVLN is a condensing tankless water heater for residential and commercial use. For commercial applications, the program chip can be upgraded so the unit runs at higher water temperatures. It runs on natural gas and is designed for indoor installation only.
Stainless steel heat exchangers help deliver its listed 94% efficiency. A self-diagnostic system is designed to make installation and service easier, and a built-in condensate neutralizer saves a separate installation step.
A big practical plus: it’s compatible with a 1/2-inch gas line up to 24 feet. Many higher-BTU units require upgrading to a 3/4-inch line, and some homeowners have even needed a gas meter upgrade. It vents with PVC, which costs much less than the stainless steel venting some brands require.
Rheem’s design is aimed at simpler installation, but gas appliance work is subject to local codes, so check requirements and use a qualified installer where needed.
Warranty
According to the manufacturer at the time of writing, the unit carries a 12-year warranty on the heat exchanger, 5 years on parts and 1 year on labor.
Listed specifications
- Dimensions: 18.5 x 9.8 x 27.5 inches
- Weight: 79 lb
- Fuel type: Natural gas
- Input: 199,000 BTU
- Flow: 9.5 gallons per minute
- Efficiency: 94%
- Installation: Indoor, direct vent (PVC)
- Gas line: 1/2 inch, up to 24 ft
- Maximum temperature: 120°F (residential)
Pros
- 94% listed efficiency
- Continuous hot water on demand
- High 199,000 BTU input
- 1/2-inch gas line compatible
- Lower-cost PVC venting
- Built-in condensate neutralizer
- Long heat exchanger warranty
Cons
- Maximum temperature of 120°F on residential settings
- Indoor installation only
- Some owners reported frequent error code 13; low-flow faucets or shower heads may be a cause
Bottom line
The Rheem RTGH-95DVLN suits homeowners who want an efficient indoor natural gas tankless heater without upgrading their gas line or paying for stainless venting. Sized correctly for your household, a tankless unit can supply more than one hot water fixture at a time, and you stop paying to keep a tank of water hot when you’re not using it.
Upfront costs are usually higher than a traditional tank, but tankless units tend to last longer, and a failure won’t dump a tank of water on your floor. To compare alternatives, see our Noritz NRC661-DV-NG review and Takagi tankless water heater article.
FAQ
Can the Rheem RTGH-95DVLN be installed outdoors?
No. This model is designed for indoor installation only.
What is the maximum water temperature?
It is 120°F on residential settings. For commercial applications, the program chip can be upgraded to allow higher temperatures.
Does it need a 3/4-inch gas line?
No. It is listed as compatible with a 1/2-inch gas line up to 24 feet.
