Noritz NR66ODNG Outdoor Tankless Water Heater vs Noritz NRC66DVNG Indoor Condensing Direct: Spec Comparison
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This comparison of the noritz nr66odng outdoor tankless water heater vs nrc66dvng indoor model highlights two high-efficiency units from Noritz. Both deliver 6.6 GPM of hot water using natural gas. They share low NOx emissions and high efficiency ratings. The main difference lies in their installation location. One unit is designed for indoor use with condensing venting. The other is built for outdoor environments. You need to choose based on where you plan to mount the unit.
Key differences
| Aspect | Noritz 6.6 GPM Indoor Natural Gas Tankless Heater | Noritz Outdoor Natural Gas Water Heater 6.6 GPM |
|---|---|---|
| Installation Location | Indoor | Outdoor |
| Venting Type | Condensing | not listed |
| Dimensions (H x W x D) | 23.6 x 13.8 x 10 inches | 26.6 x 17.6 x 10.7 inches |
| Weight | 38 pounds | 36 pounds |
| Included Accessories | Remote thermostat & 6' power cord | not listed |
Which one should you choose?
Choose Noritz 6.6 GPM Indoor Natural Gas Tankless Heater if
- You need an indoor installation with condensing venting options.
- You want a remote thermostat and power cord included.
- You prefer a narrower unit that is 13.8 inches wide.
Choose Noritz Outdoor Natural Gas Water Heater 6.6 GPM if
- You plan to install the unit in an outdoor location.
- You need a unit rated for 140,000 Btuh.
- You want a lighter unit at 36 pounds.
Verdict: Choose the NRC66DVNG if you require an indoor setup with specific venting capabilities and included accessories. Pick the NR66ODNG if your installation site is outdoors or if you prefer the higher BTU rating. Both models provide the same flow rate for your hot water needs.
Noritz Outdoor vs Indoor Spec Breakdown
Installation location
The Noritz NRC66DVNG is designed specifically for indoor installation. You must place it inside your home or building. The Noritz NR66ODNG is built for outdoor use. It handles weather exposure directly. This is the primary difference between these two units. If you need to install the heater in a garage, basement, or utility room, you must choose the indoor model. If you plan to mount it on an exterior wall, the outdoor model is the correct choice. Do not install the outdoor unit indoors or the indoor unit outdoors.
Venting type
The indoor NRC66DVNG uses a condensing venting system. This allows you to use standard Schedule 40 PVC pipe and fittings for exhaust. This simplifies installation in many indoor spaces. The outdoor NR66ODNG does not list a specific venting type in the provided data. Outdoor units often use different exhaust methods suited for exterior mounting. You should check the manual for the outdoor model's specific venting requirements. The indoor unit offers a clear advantage here if you want to use PVC piping easily.
Flow rate
Both units deliver the same hot water capacity. The Noritz NRC66DVNG provides 6.6 GPM. The Noritz NR66ODNG also provides 6.6 GPM. This means they can supply hot water at the same speed. You will get the same performance for showers and sinks. Neither unit has an advantage in flow rate. Both are suitable for households needing consistent hot water supply. The output is identical regardless of whether you choose the indoor or outdoor version.
Dimensions and size
The physical sizes differ between the two models. The indoor NRC66DVNG is 13.8 inches wide, 23.6 inches high, and 10 inches deep. It is narrower but taller. The outdoor NR66ODNG is 17.6 inches wide, 26.6 inches high, and 10.7 inches deep. It is wider and slightly taller. The outdoor unit takes up more wall space. Check your available space carefully. The indoor model is more compact in width, which might fit better in tighter indoor closets.
Weight
Weight is another point of difference. The indoor NRC66DVNG weighs 38 pounds. The outdoor NR66ODNG weighs 36 pounds. The outdoor unit is slightly lighter by two pounds. This difference is minor for mounting purposes. Both units are relatively lightweight for tankless heaters. You will need proper mounting hardware for either. The indoor model is marginally heavier, but the difference is negligible in practice.
Included accessories
The indoor NRC66DVNG includes a remote thermostat and a 6-foot power cord. This adds convenience for controlling temperature from a distance. The outdoor NR66ODNG does not list any included accessories in the data. You may need to purchase a remote thermostat separately for the outdoor unit. This gives the indoor model an advantage in terms of what you get in the box. Check the outdoor unit manual for optional remote control compatibility.
Choose the Right Noritz for You
Homeowners with limited indoor space
The NR66ODNG fits outdoor areas where indoor units cannot go. It measures 26.6 inches high and 17.6 inches wide. This model handles weather exposure directly. You save interior space by placing it outside. The compact depth of 10.7 inches helps with tight spots. It delivers 6.6 GPM of hot water efficiently.
Users needing indoor condensing venting
The NRC66DVNG is built for indoor installation. It uses condensing venting that works with Schedule 40 PVC pipe. This simplifies installation inside your home. The unit includes a remote thermostat and a 6-foot power cord. These features allow flexible placement and control. It maintains high efficiency while staying indoors.
Buyers wanting included remote control
The NRC66DVNG comes with a remote thermostat. You can adjust settings from a distance. This is useful for indoor installations where the unit is not easily accessible. The included 6-foot power cord adds convenience. Both models offer 6.6 GPM flow, but this one includes these specific accessories for easier management.
The products compared
Noritz 6.6 GPM Indoor Natural Gas Tankless Heater
Best for: indoor gas water heating
- Fuel Type
- Natural Gas
- Flow Rate
- 6.6 GPM
- Installation Location
- Indoor
- Venting Type
- Condensing
- Dimensions
- 6.7 × 13.8 × 23.6 inches
- Weight
- 38 pounds
View on Amazon: Noritz 6.6 GPM Indoor Natural Gas Tankless Heater Affiliate link
This Noritz model delivers 6.6 GPM of hot water using natural gas. It is designed for indoor installation and uses condensing technology for high efficiency. The unit vents through Schedule 40 PVC pipe. It includes a remote thermostat and a 6-foot power cord. Its compact size fits well in utility spaces where indoor placement is required.
Pros
- 6.6 GPM flow rate
- Condensing venting with PVC
- Includes remote thermostat
- Indoor installation design
Cons
- Indoor-only installation
- Heavier at 38 pounds
- Larger footprint than outdoor units
Good fit if
- You need an indoor unit
- You want high efficiency
- You prefer PVC venting
Skip if
- You require outdoor placement
- You need propane fuel
- You want a lighter unit
Verdict: Noritz NRC66DVNG Indoor Condensing Unit suits indoor projects requiring efficient gas heating. It fits homes needing indoor venting solutions.
Noritz Outdoor Natural Gas Water Heater 6.6 GPM
Best for: outdoor natural gas installations
- Fuel Type
- Natural Gas
- Flow Rate
- 6.6 Gpm
- BTU
- 140,000 Btuh
- Installation Location
- Outdoor
- Dimensions
- 26.6 x 17.6 x 10.7 inches
- Weight
- 36 pounds
View on Amazon: Noritz Outdoor Natural Gas Water Heater 6.6 GPM Affiliate link
The Noritz NR66ODNG is an outdoor tankless water heater designed for natural gas. It delivers 6.6 GPM at 140,000 BTU with a 0.81 UEF. Its compact 26.6-inch height fits tight spaces. You get endless hot water with low NOx emissions. This unit suits outdoor installations where condensing models are not viable. It offers high efficiency for standard outdoor use.
Pros
- 140,000 BTU heating capacity
- 6.6 GPM flow rate
- 0.81 UEF efficiency rating
- Low NOx emissions
Cons
- Outdoor installation only
- 36 pounds weight
- No finish specified
Good fit if
- You need an outdoor unit
- You want high efficiency
- You prefer natural gas
Skip if
- You need indoor installation
- You require condensing technology
- You need higher flow rates
Verdict: Noritz NR66ODNG Outdoor Tankless Heater provides reliable outdoor performance with high efficiency. It fits buyers needing natural gas power in outdoor settings.
Specifications side by side
| Spec | Noritz 6.6 GPM Indoor Natural Gas Tankless Heater | Noritz Outdoor Natural Gas Water Heater 6.6 GPM |
|---|---|---|
| Fuel Type | Natural Gas | Natural Gas |
| Flow Rate | 6.6 GPM | 6.6 Gpm |
| BTU | not stated | 140,000 Btuh |
| Installation Location | Indoor | Outdoor |
| Dimensions | not stated | 26.6 x 17.6 x 10.7 inches |
| Venting Type | Condensing | not stated |
| Weight | 38 pounds | 36 pounds |
| Size | 13.8 inches (W) x 23.6 inches (H) x 10 inches (D) | not stated |
| Color | White | No Finish |
| Model | NRC661-DV-NG | NR662-OD-NG |
Frequently asked questions
Can the Noritz NRC66DVNG be installed outdoors?
No, the NRC66DVNG is designed strictly for indoor installation. It is not built to withstand weather exposure. You must place it inside your home or building. The NR66ODNG is the model intended for outdoor use. It handles direct weather exposure. Choose the indoor unit only if you have a suitable indoor space with proper venting.
How do the dimensions of these two units compare?
The indoor NRC66DVNG is slightly narrower but shorter than the outdoor NR66ODNG. The indoor unit measures 13.8 inches wide, 23.6 inches high, and 10 inches deep. The outdoor unit is 17.6 inches wide, 26.6 inches high, and 10.7 inches deep. The indoor model is also heavier at 38 pounds compared to the 36-pound outdoor unit.
Do both models provide the same water flow rate?
Yes, both the Noritz NRC66DVNG and the NR66ODNG deliver a flow rate of 6.6 GPM. This means you get the same volume of hot water from either unit. Both units run on natural gas. You can choose based on your installation location rather than flow performance.
What type of venting does the indoor unit require?
The Noritz NRC66DVNG uses condensing venting technology. This system is designed for indoor installation. It allows you to vent the unit inside your home structure. The outdoor NR66ODNG does not have this specific indoor venting requirement since it is built for exterior placement.
Which unit is better for saving interior space?
The NR66ODNG is better for saving interior space. You can place this outdoor model outside your home. It measures 26.6 inches high and 17.6 inches wide. This keeps the unit out of your living area. The NRC66DVNG must be installed indoors, taking up wall space inside.
Is there a color difference between the two models?
The indoor NRC66DVNG comes in a white finish. This is suitable for visible indoor installations. The outdoor NR66ODNG has no specific finish listed. It is designed for outdoor use where appearance is less critical. Both units serve the same heating function regardless of their exterior color.