Rinnai vs Noritz Tankless Water Heaters: Which Brand Fits You?
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Choosing between a rinnai vs noritz tankless water heater often comes down to specific installation needs and fuel flexibility. Both models offer an 11.1 GPM flow rate for simultaneous fixture use. However, they differ significantly in fuel options and physical footprint. Rinnai provides dual-fuel capability, while Noritz focuses on natural gas efficiency in a narrower chassis. Understanding these specs helps you pick the right unit for your home.
Key differences
| Aspect | Rinnai 11.1 GPM Condensing Dual-Fuel Water Heater | Noritz EZ Series Pro 11.1 GPM Natural Gas Heater |
|---|---|---|
| Flow Rate | 11.1 GPM | 11.1 GPM |
| Fuel Type | Propane or Natural Gas | Natural Gas |
| Installation Location | Indoor/Outdoor | Indoor/Outdoor |
| Dimensions (H x W x D) | 30.1 x 18.5 x 30.1 inches | 26.1 x 18.1 x 11.8 inches |
| Weight | 55 pounds | 77.2 pounds |
| Venting Type | Condensing | not listed |
Which one should you choose?
Choose Rinnai 11.1 GPM Condensing Dual-Fuel Water Heater if
- You need flexibility to use either propane or natural gas depending on your local supply.
- You have limited vertical space but can accommodate a wider and deeper unit.
- You want a condensing design that may offer higher thermal efficiency for your home.
Choose Noritz EZ Series Pro 11.1 GPM Natural Gas Heater if
- You primarily use natural gas and do not require propane compatibility.
- You need a unit with a smaller depth to fit into tight utility closets or alcoves.
- You prefer a model with a higher BTU input for robust heating performance.
Verdict: Rinnai is the better choice if you need dual-fuel flexibility or a condensing system for efficiency. Noritz fits better if you have space constraints regarding depth and rely solely on natural gas. Both provide ample hot water for households with multiple simultaneous uses.
Rinnai vs Noritz Comparison
Fuel flexibility
The Rinnai RX199iN features a Smart Sense gas control system, allowing it to run on either propane or natural gas. This dual-fuel capability provides significant installation flexibility, especially if you already have a propane tank or want the option to switch fuels later. In contrast, the Noritz GQ-C3261WX-FF is listed strictly as a natural gas model. If your home relies on propane, the Noritz unit is not a viable option without major fuel line modifications. For households needing versatile fuel sources, the Rinnai design offers a clear advantage in compatibility.
Physical footprint
Size matters when finding a spot for a tankless heater. The Noritz EZ Series Pro measures 11.8 inches in length, 18.1 inches in width, and 26.1 inches in height. It is notably shallower than the Rinnai RX199iN, which spans 30.1 inches in length, 18.5 inches in width, and 30.1 inches in height. If you have limited wall space or need to fit the unit into a tighter utility closet, the Noritz profile is more compact. The Rinnai requires more linear space due to its deeper chassis design.
Weight and build
Weight impacts how you mount the unit and the structural support needed. The Noritz GQ-C3261WX-FF weighs 77.2 pounds, while the Rinnai RX199iN is lighter at 55 pounds. The Noritz unit is denser, which may require stronger mounting brackets or a more robust wall structure to ensure safety and stability. The Rinnai’s lighter construction makes it easier to handle during installation and places less stress on the mounting surface. For older homes with weaker wall framing, the Rinnai’s lower weight is a practical benefit.
Electrical requirements
Both units require electricity to operate their internal controls and fans, but the specifics differ. The Noritz GQ-C3261WX-FF explicitly lists a 120-volt requirement, which is standard for most household outlets. The Rinnai RX199iN data does not specify a voltage rating, though it includes a smart interface and WiFi control module options. Standard 120V is likely sufficient for Rinnai, but you should verify the exact electrical needs with a technician. If you are unsure about your outlet capacity, the Noritz specification provides clearer guidance for standard wiring.
Venting technology
The Rinnai RX199iN is a condensing unit, which means it extracts more heat from the exhaust gases, improving efficiency and allowing for smaller vent pipes. This technology also manages moisture in the exhaust, making it suitable for various indoor installations. The Noritz GQ-C3261WX-FF is listed for indoor/outdoor use, but the data does not explicitly label it as condensing. Condensing units often offer higher efficiency ratings, such as the Rinnai’s .98 UEF. If high energy efficiency and flexible venting options are priorities, the Rinnai’s condensing design is a strong point.
Pick the heater for your home
Users needing propane or natural gas
The Rinnai RX199iN features a Smart Sense gas control system that allows it to run on either propane or natural gas. This dual-fuel capability offers significant installation flexibility, especially if you already have a propane tank or want the option to switch fuels later without replacing the unit.
Those with limited installation space
The Noritz GQ-C3261WX-FF measures 11.8 x 18.1 x 26.1 inches, making it narrower than the Rinnai model. If you are installing this unit in a tight closet or a constrained outdoor area, the compact depth of the Noritz provides a better fit while still delivering the same 11.1 GPM flow rate.
Buyers wanting smart home integration
The Rinnai RX199iN supports connectivity via the Controlr module for WiFi control, allowing you to monitor and manage the heater remotely. While the module is not included, the hardware readiness for smart integration is a clear advantage if you want to track usage or troubleshoot issues through an app.
The products compared
Rinnai 11.1 GPM Condensing Dual-Fuel Water Heater
Best for: High-flow needs with indoor or outdoor flexibility
- Fuel Type
- Natural Gas or Propane
- Flow Rate
- 11.1 GPM
- BTU
- 199k BTU
- Installation Location
- Indoor/Outdoor
- Venting Type
- Condensing
- Dimensions
- 30.1 × 18.5 × 30.1 inches
View on Amazon: Rinnai 11.1 GPM Condensing Dual-Fuel Water Heater Affiliate link
This Rinnai tankless water heater delivers 11.1 GPM of hot water for up to seven fixtures. It uses a condensing design for a .98 UEF and works with propane or natural gas. The unit fits indoors or outdoors. You get a compact build at 55 pounds. The Smart Sense gas control adapts to fuel type. A Controlr module adds WiFi, but it is not included.
Pros
- 11.1 GPM flow rate supports seven fixtures
- Condensing design achieves .98 UEF efficiency
- Installs indoors or outdoors with Smart Sense gas control
- Quick Flush feature simplifies maintenance
Cons
- WiFi Controlr module is not included
- 55-pound weight requires sturdy mounting
- Labor warranty drops to one year if not registered within 90 days
Good fit if
- You need high flow for multiple bathrooms
- You want efficient condensing technology
- You need indoor or outdoor flexibility
Skip if
- You want included WiFi control
- You prefer a lighter unit under 50 pounds
- You cannot register the product quickly after installation
Verdict: Rinnai RX199iN 11.1 GPM Condensing Heater suits homes needing high flow and flexible placement. Its condensing efficiency and Smart Sense gas control make it a strong option for large households with varied fuel access.
Noritz EZ Series Pro 11.1 GPM Natural Gas Heater
Best for: High flow needs with flexible installation
- Fuel Type
- Natural Gas
- Flow Rate
- 11.1 GPM
- BTU
- 199,900 BTU
- Installation Location
- Indoor/Outdoor
- Voltage
- 120 V
- Dimensions
- 11.8 x 18.1 x 26.1 in
View on Amazon: Noritz EZ Series Pro 11.1 GPM Natural Gas Heater Affiliate link
This Noritz unit delivers 11.1 GPM at 199,900 BTU using natural gas. It measures 11.8 by 18.1 by 26.1 inches and weighs 77.2 pounds. The 120-volt design supports indoor or outdoor placement. You get reliable performance in a compact silver body. It suits homes needing high flow rates without condensing technology complexity.
Pros
- 11.1 GPM flow rate for multiple simultaneous uses
- 199,900 BTU heating power
- Compact dimensions: 11.8 x 18.1 x 26.1 inches
- Indoor and outdoor installation flexibility
Cons
- Non-condensing design may have lower efficiency than condensing models
- Requires natural gas connection
- 120-volt electrical requirement for ignition
Good fit if
- You need high flow rates for large households
- You want indoor or outdoor installation options
- You prefer non-condensing technology simplicity
Skip if
- You require condensing efficiency for maximum energy savings
- You only have propane available
- You need smart home integration features
Verdict: Noritz GQ-C3261WX-FF 11.1 GPM Gas Heater delivers strong performance for homes needing high flow rates. It fits buyers who want flexible installation without condensing technology complexity.
Specifications side by side
| Spec | Rinnai 11.1 GPM Condensing Dual-Fuel Water Heater | Noritz EZ Series Pro 11.1 GPM Natural Gas Heater |
|---|---|---|
| Fuel Type | Natural Gas or Propane | Natural Gas |
| Flow Rate | 11.1 GPM | 11.1 GPM |
| BTU | 199k BTU | 199,900 BTU |
| Installation Location | Indoor/Outdoor | Indoor/Outdoor |
| Voltage | not stated | 120 V |
| Dimensions | not stated | 11.8 x 18.1 x 26.1 in |
| Venting Type | Condensing | not stated |
| Weight | 55 pounds | 77.2 pounds |
| Size | 11.1 GPM | not stated |
| Color | Silver | Silver |
| Model | RX199iN | GQ-C3261WX-FF US NG |
Frequently asked questions
Can Rinnai and Noritz heaters be installed outdoors?
Yes, both brands offer models suitable for outdoor placement. The Noritz GQ-C3261WX-FF is explicitly listed for outdoor installation. The Rinnai RX199iN provides flexible placement options, allowing it to be installed indoors or outdoors. This flexibility helps you choose the best spot for your home's layout and local climate conditions.
Which tankless water heater has a smaller width?
The Noritz unit is slightly narrower. It measures 18.1 inches in width. The Rinnai model is 18.5 inches wide. If you have a tight installation space, the Noritz design offers a marginally smaller footprint. Both units are similar in height, so width is the primary dimension to check for confined areas.
Do these models support high flow rates for large homes?
Yes, both heaters deliver 11.1 GPM. This high flow rate supports simultaneous use of multiple fixtures, such as showers and sinks. This capacity suits large households with varied hot water demands. You get consistent performance without significant temperature drops when multiple outlets are active at the same time.
Is one model lighter than the other?
The Rinnai heater is lighter. It weighs 55 pounds. The Noritz unit weighs 77.2 pounds. The weight difference may affect your installation process, especially if you need to mount the unit on a wall. Consider your mounting surface strength and handling capabilities when choosing between these two specific models.
What is the main difference in venting technology?
The Rinnai model uses condensing venting technology. This type of venting is not mentioned for the Noritz unit in the provided data. Condensing technology often improves efficiency by capturing heat from exhaust gases. This difference impacts how you need to plan venting routes and pipe connections for each system.
Are the dimensions of these units similar?
They share similar heights but differ in length. The Rinnai unit is 30.1 inches long. The Noritz unit is 11.8 inches long. The Noritz design is more compact in depth. You should measure your intended installation area carefully, as the length difference is significant and may affect clearance requirements.
Which brand offers dual-fuel capability?
Rinnai offers dual-fuel capability with its RX199iN model. It can run on either propane or natural gas. This feature provides installation flexibility if you have a propane tank or want future fuel options. The Noritz model listed is specified for natural gas only, limiting your fuel choices to that single type.