Rheem RTG 9.5 GPM Natural vs Rheem RTGH 9.5 GPM Propane Tankless Water Heater (2026): Key Differences
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This rheem rtg 9 5 gpm natural vs rtgh 9 5 gpm propane tankless water comparison helps you pick the right unit. Both models deliver 9.5 GPM at a 35°F rise and share identical BTU output. They also feature the same precise digital temperature control and indoor installation requirements. The main difference lies in their fuel source and efficiency. One uses natural gas with non-condensing tech, while the other burns propane with condensing technology. Your existing fuel supply determines the correct choice.
Key differences
| Aspect | Rheem RTG 9.5 GPM Natural Gas Water Heater | Rheem RTGH 9.5 GPM Propane Tankless Water Heater |
|---|---|---|
| Fuel Type | Natural Gas | Liquid Propane |
| Efficiency Type | Non-Condensing | Condensing |
| UEF | 0.82 | 0.93 |
| WiFi Capability | Enabled | Not listed in standard specs |
| Dimensions (H x W x D) | 24.2 x 13.5 x 10.3 inches | 23.7 x 17.7 x 9.8 inches |
| Weight | 46.5 pounds | 59.9 pounds |
Which one should you choose?
Choose Rheem RTG 9.5 GPM Natural Gas Water Heater if
- You have a natural gas line available for indoor installation.
- You prefer a lighter unit that is easier to mount on the wall.
- You want built-in WiFi connectivity for remote monitoring.
Choose Rheem RTGH 9.5 GPM Propane Tankless Water Heater if
- You rely on a propane tank for your home heating needs.
- You want the highest energy efficiency with a 0.93 UEF rating.
- You need a unit that complies with ultra-low NOx emission standards.
Verdict: Choose the RTG if you have natural gas and want WiFi features. Pick the RTGH if you use propane and prioritize maximum energy efficiency. Both provide endless hot water for whole-house use.
RTG vs RTGH Key Differences
fuel type
The Rheem RTG 9.5 GPM Natural Gas Water Heater runs on natural gas. The Rheem RTGH 9.5 GPM Propane Tankless Water Heater uses liquid propane. You must choose the fuel source available at your home. Natural gas lines are common in urban areas. Propane tanks are often used in rural locations. This choice determines the burner configuration and gas valve requirements. Both units deliver the same 199,900 BTU/hr output. The fuel type does not change the flow rate or temperature precision. It only changes how you connect the gas supply.
efficiency
Efficiency varies significantly between these two models. The RTG is a non-condensing unit with a 0.82 Uniform Energy Factor. The RTGH uses condensing technology and achieves a 0.93 Uniform Energy Factor. This higher UEF means the RTGH extracts more heat from the fuel. It uses up to 34% less energy than standard 50-gallon electric tank heaters. The RTGH also meets super high efficiency standards with ultra-low NOx emissions. If your goal is to minimize energy usage, the RTGH is the superior choice. The RTG is efficient but relies on older non-condensing technology.
dimensions
Physical size affects where you can install the unit. The RTG measures 24.2 inches in height, 13.5 inches in width, and 10.3 inches in length. It weighs 46.5 pounds. The RTGH is wider and shorter. It measures 23.7 inches in height, 17.7 inches in width, and 9.8 inches in length. It weighs 59.9 pounds. The RTGH is heavier due to its condensing heat exchanger. The RTG is narrower, which may fit better in tight vertical spaces. Check your installation area carefully. The width difference is significant for mounting on a wall.
connectivity
Smart features differ between the two models. The RTG is listed as WiFi enabled. This allows you to monitor and control the heater remotely. The RTGH specification sheet lists it as 9.5 GPM without WiFi in its primary configuration. While variations exist, the base model lacks this connectivity. If you want to adjust settings from your phone, the RTG is the better option. You can check the specific variation details before purchasing. For most users, remote control adds convenience. It allows you to troubleshoot issues or adjust temperatures without going to the utility closet.
venting type
Both units require indoor installation with direct vent systems. However, the venting requirements differ due to efficiency. The RTG is non-condensing. It vents hot exhaust gases directly outside. The RTGH is condensing. It produces acidic condensate that requires specific drainage and venting materials. The RTGH is ultra-low NOx compliant, which may affect local venting codes. You need to ensure your home has the proper venting infrastructure for the chosen model. Improper venting can lead to safety issues. Always follow the installation manual for the specific model you select.
Which unit fits your home best
Home with existing natural gas lines
You already have natural gas service at your property. This model connects directly to your existing supply without needing propane tanks. It delivers 9.5 GPM for whole-house use. The non-condensing design simplifies venting requirements. Choose this unit if your infrastructure is already set up for natural gas.
User seeking highest energy efficiency
This propane model offers a superior 0.93 Uniform Energy Factor. The condensing technology captures more heat from the exhaust. This efficiency rating exceeds the non-condensing alternative. You will save more energy during operation. Select this unit if maximizing efficiency and reducing energy consumption are your primary goals.
Buyer wanting smart home connectivity
The natural gas variant includes built-in WiFi capabilities. You can monitor and control the unit remotely via a mobile app. This feature allows for precise temperature adjustments from anywhere. The propane model lacks this specific connectivity option in this configuration. Choose this unit if remote management is important to you.
The products compared
Rheem RTG 9.5 GPM Natural Gas Water Heater
Best for: Whole-house natural gas hot water
- Fuel Type
- Natural Gas
- Flow Rate
- 9.5 GPM
- BTU
- 199,900 BTU/hr
- Installation Location
- Indoor
- Temperature Control
- ±1°F
- Certification
- CSA
View on Amazon: Rheem RTG 9.5 GPM Natural Gas Water Heater Affiliate link
This Rheem RTG unit delivers 9.5 GPM at a 35°F rise using natural gas. It features 199,900 BTUs and a 0.82 UEF for whole-house use. The indoor design includes WiFi control and ±1°F temperature precision. It suits homes needing high flow for multiple simultaneous showers while saving space.
Pros
- 9.5 GPM flow rate supports 3-4 simultaneous showers
- 199,900 BTU/hr output for rapid heating
- WiFi enabled for remote monitoring
- ±1°F digital temperature control precision
- 0.82 Uniform Energy Factor saves energy
Cons
- Indoor installation only requires specific venting
- Non-condensing design may be less efficient than condensing models
- Requires professional installation
Good fit if
- You need high flow for multiple bathrooms
- You have natural gas available
- You want WiFi connectivity
Skip if
- You need outdoor installation
- You use propane fuel
- You prefer condensing technology
Verdict: Rheem RTG 9.5 GPM Natural Gas fits large households with natural gas lines who need high simultaneous flow and smart connectivity. It is ideal for whole-house hot water demands.
Rheem RTGH 9.5 GPM Propane Tankless Water Heater
Best for: Indoor propane homes needing high flow
- Fuel Type
- Liquid Propane
- Flow Rate
- 9.5 GPM
- BTU
- 199,900 BTU/hr
- Installation Location
- Indoor
- Temperature Control
- ±1°F
- Certification
- CSA
View on Amazon: Rheem RTGH 9.5 GPM Propane Tankless Water Heater Affiliate link
This Rheem unit delivers 9.5 GPM of hot water using liquid propane. It features 199,900 BTUs and a 0.93 UEF for high efficiency. The design fits indoor spaces with direct venting. You get precise digital control and freeze protection. It suits large homes needing multiple simultaneous showers. The compact size fits tight utility areas.
Pros
- 9.5 GPM flow rate for whole-house use
- 0.93 Uniform Energy Factor for low gas bills
- Precise ±1°F digital temperature control
- Indoor direct vent installation
- 15-year heat exchanger warranty
Cons
- Requires liquid propane fuel source
- Indoor installation only
- 59.9 pounds weight
Good fit if
- You have a propane supply line
- You need indoor installation
- You want high efficiency
Skip if
- You use natural gas
- You need outdoor installation
- You prefer electric heating
Verdict: Rheem RTGH 9.5 GPM Propane offers high efficiency and precise control for propane users. It fits large homes with indoor direct vent setups.
Specifications side by side
| Spec | Rheem RTG 9.5 GPM Natural Gas Water Heater | Rheem RTGH 9.5 GPM Propane Tankless Water Heater |
|---|---|---|
| Fuel Type | Natural Gas | Liquid Propane |
| Flow Rate | 9.5 GPM | 9.5 GPM |
| BTU | 199,900 BTU/hr | 199,900 BTU/hr |
| Installation Location | Indoor | Indoor |
| Temperature Control | ±1°F | ±1°F |
| Certification | CSA | CSA |
| Dimensions | 24.2 x 13.5 x 10.3 inches | 23.7 x 17.7 x 9.8 inches |
| Venting Type | Non-Condensing | not stated |
| Features | WiFi | WiFi |
| Weight | 46.5 pounds | 59.9 pounds |
| Size | 9.5 GPM (WiFi) | 9.5 GPM (Without WiFi) |
| Color | Gray | Gray |
| Model | RTG-95DVELN-3 | RTGH-95DVLP-3 |
Frequently asked questions
Does the Rheem RTG 9.5 GPM Natural Gas model include WiFi connectivity?
Yes, the Rheem RTG 9.5 GPM Natural Gas Water Heater includes WiFi capabilities. This feature allows you to monitor and adjust settings remotely. The product data confirms WiFi as a key attribute for this specific natural gas unit.
Is the Rheem RTGH 9.5 GPM Propane unit WiFi enabled?
No, the Rheem RTGH 9.5 GPM Propane Tankless Water Heater does not feature WiFi. The specifications list it as 'Without WiFi.' You will need to control this propane model manually or through its local interface without remote app access.
How much wider is the propane model compared to the natural gas version?
The Rheem RTGH 9.5 GPM Propane unit is 4.2 inches wider than the natural gas model. The propane unit measures 17.7 inches in width, while the natural gas unit is 13.5 inches wide. This difference matters for your installation space.
Which Rheem tankless heater weighs more?
The Rheem RTGH 9.5 GPM Propane Tankless Water Heater weighs more. It tips the scales at 59.9 pounds. The natural gas model is lighter at 46.5 pounds. You should consider this weight difference if you are mounting the unit on a wall.
Can both Rheem models be installed indoors?
Yes, both units are designed for indoor installation. The Rheem RTG 9.5 GPM Natural Gas model is rated for indoor use. The Rheem RTGH 9.5 GPM Propane model is also specified for indoor locations. Ensure your space meets ventilation requirements for the chosen fuel type.
Do both models provide the same flow rate?
Yes, both heaters deliver a flow rate of 9.5 GPM. This capacity supports whole-house hot water demands for large households. You get consistent performance regardless of whether you choose the natural gas or propane version for your home.
What is the height difference between the two units?
The natural gas model is slightly taller. The Rheem RTG 9.5 GPM Natural Gas Water Heater stands 24.2 inches high. The propane unit is 23.7 inches tall. The half-inch difference is minor but worth noting for vertical clearance planning.