ECCOTEMP 6.8 GPM Indoor Natural vs ECCOTEMP 6.8 GPM Outdoor Natural (2026): Key Differences
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The eccotemp 6 8 gpm indoor natural vs 6 8 gpm outdoor natural comparison highlights a single key distinction between two nearly identical units. Both models deliver 6.8 GPM at 140,000 BTU using natural gas. They share the same smart features, dimensions, and temperature controls. The primary difference lies in their installation location. You must choose based on where you plan to mount the unit. This decision affects your venting and weather protection needs.
Key differences
| Aspect | Eccotemp 6.8 GPM Indoor Natural Gas Water Heater | Eccotemp 6.8 GPM Outdoor Natural Gas Water Heater |
|---|---|---|
| Installation Location | Indoor | Outdoor |
| Model Number | SH22i-NG | SH22-NG |
| Certification | CSA | CSA |
Which one should you choose?
Choose Eccotemp 6.8 GPM Indoor Natural Gas Water Heater if
- You have an existing indoor venting setup in a garage or utility room.
- You want to protect the unit from extreme weather conditions.
- You prefer keeping the appliance out of sight in a conditioned space.
Choose Eccotemp 6.8 GPM Outdoor Natural Gas Water Heater if
- You lack indoor space or existing gas venting infrastructure.
- You want to save interior square footage for living areas.
- You have an exterior wall suitable for direct venting to the outside.
Verdict: Choose the indoor model if you already have the necessary venting and want to shield the unit from the elements. Select the outdoor model if you need to free up interior space or lack indoor venting options. Both units offer identical performance and smart features for your hot water needs.
Indoor vs Outdoor Model Specs
Installation Location
The most critical difference lies in where you place the unit. Product A, the Eccotemp SH22i-NG, is designed for indoor installation. You must mount this model inside your home, typically in a garage, basement, or utility closet. Product B, the Eccotemp SH22-NG, is rated for outdoor installation. You can mount this unit on an exterior wall. This distinction dictates your plumbing and gas line routing. Choose the indoor model if you need to protect the unit from weather. Select the outdoor model if you prefer to keep mechanical equipment outside your living space.
Flow Rate Capacity
Both models provide identical water flow performance. Each unit is rated at 6.8 gallons per minute (GPM). This capacity is measured at a standard 140,000 BTU input with a 35-degree Fahrenheit temperature rise. This flow rate supports up to three bathrooms running simultaneously. You get the same volume of hot water regardless of which model you choose. The internal heating elements and gas valves are engineered to deliver this exact output. Your choice between indoor and outdoor does not change the volume of water available for showers, sinks, or appliances.
Power Consumption
Energy efficiency is comparable across both units. Both the indoor SH22i-NG and the outdoor SH22-NG utilize 140,000 BTU of natural gas. They share the same smart Eco Mode feature, which can reduce energy consumption by up to 25 percent. The mobile app allows you to track usage and adjust settings remotely. Neither model has a higher baseline power draw than the other. You will see the same utility impact from the smart scheduling and temperature adjustments. The efficiency rating is tied to the shared SH22 series engineering.
Smart Connectivity
Both heaters offer the same advanced digital controls. You can connect either model to the Eccotemp mobile app for real-time temperature adjustments and error detection. Voice control works with Amazon Alexa and Google Home for both units. The Smart Power Button features are identical, allowing you to toggle power, enter sleep mode, or view error codes via the app. The app interface supports dual currency and temperature units for both products. Your smart home integration experience will be exactly the same regardless of the installation location.
Physical Dimensions
The footprint and weight of these units are identical. Both the indoor and outdoor models measure 7.25 inches in height, 14 inches in width, and 23 inches in length. Each unit weighs 39 pounds. The color finish is black for both. You will need the same amount of clearance space for either installation. The mounting hardware requirements are likely similar due to the shared chassis design. Your existing venting or mounting structure can accommodate either model without needing different spatial allowances.
Which ECCOTEMP 6.8 GPM Model Fits You
Homeowners with garage or basement space
You should choose the indoor model if you have dedicated space inside your home. This unit is designed for indoor installation in areas like garages or utility closets. It offers the same 6.8 GPM flow rate and 140,000 BTU output as the outdoor version, ensuring reliable hot water for up to three bathrooms without exposing the unit to weather elements.
Users with limited interior installation space
If you lack suitable indoor space for a tankless water heater, the outdoor model is your practical choice. It is built for exterior mounting, freeing up valuable interior square footage. Despite being placed outside, it delivers identical performance with 6.8 GPM at 140,000 BTU. You still get full smart home integration and precise temperature control from 95 to 140 degrees Fahrenheit.
Renters needing flexible placement options
Renters often face restrictions on modifying interior systems. The outdoor model allows you to install the unit outside your living space, avoiding complex indoor venting or structural changes. It maintains the same 140,000 BTU heating capacity and 6.8 GPM flow rate. You retain access to all smart features, including app control and voice commands, without altering your rental unit's interior.
The products compared
Eccotemp 6.8 GPM Indoor Natural Gas Water Heater
Best for: Indoor homes needing multi-bathroom hot water
- Fuel Type
- Natural Gas
- Flow Rate
- 6.8 GPM
- BTU
- 140,000 BTU
- Installation Location
- Indoor
- Temperature Control
- 95-140°F
- Certification
- CSA
View on Amazon: Eccotemp 6.8 GPM Indoor Natural Gas Water Heater Affiliate link
This indoor natural gas unit delivers 6.8 GPM at 140,000 BTU. It supports up to four applications and handles three bathrooms simultaneously. The 95-140°F range offers precise control. You can manage settings via a mobile app or voice commands. Its compact 7.25 x 14 x 23-inch frame fits tight spaces. This model suits single-family homes needing reliable, smart hot water.
Pros
- 6.8 GPM flow rate at 140,000 BTU
- Smart app control for scheduling and energy tracking
- Voice control via Alexa or Google Home
- Temperature range of 95-140°F
- Supports up to 3-4 simultaneous applications
Cons
- Indoor installation only, not suitable for outdoor use
- No remote control included in specifications
- Requires Wi-Fi connection for full smart features
Good fit if
- You need hot water for multiple bathrooms
- You want to monitor energy usage via an app
- You have an indoor space for installation
Skip if
- You require outdoor installation capability
- You prefer a unit without smartphone connectivity
- You need a flow rate higher than 6.8 GPM
Verdict: ECCOTEMP 6.8 GPM Indoor Natural Gas is ideal for homes needing high-volume hot water with smart monitoring. It fits users who value app-based control and voice commands for daily convenience.
Eccotemp 6.8 GPM Outdoor Natural Gas Water Heater
Best for: Outdoor single-family home installations
- Fuel Type
- Natural Gas
- Flow Rate
- 6.8 GPM
- BTU
- 140,000 BTU
- Installation Location
- Outdoor
- Temperature Control
- 95-140°F
- Certification
- CSA
View on Amazon: Eccotemp 6.8 GPM Outdoor Natural Gas Water Heater Affiliate link
This outdoor unit delivers 6.8 GPM at 140,000 BTU for single-family homes or light commercial use. It supports up to three simultaneous applications with a 95-140°F range. The SH22-NG model includes smart app control, voice assistant compatibility, and Eco Mode. You get precise temperature management and energy tracking via a mobile interface. It is designed for exterior installation in standard residential settings.
Pros
- 6.8 GPM flow rate at 140,000 BTU
- Smart app control with Eco Mode
- Compatible with Amazon Alexa and Google Home
- Supports up to 3 simultaneous applications
Cons
- Requires outdoor installation only
- No indoor venting capability
- Heavy at 39 pounds
Good fit if
- You need an outdoor unit for a single-family home
- You want smart energy tracking via mobile app
- You require voice control integration
Skip if
- You need an indoor installation
- You prefer a smaller footprint
- You do not want app connectivity
Verdict: ECCOTEMP 6.8 GPM Outdoor Natural Gas fits homeowners who need high-capacity outdoor heating with smart features. It suits those who value app-based energy management and voice control for their water heating system.
Specifications side by side
| Spec | Eccotemp 6.8 GPM Indoor Natural Gas Water Heater | Eccotemp 6.8 GPM Outdoor Natural Gas Water Heater |
|---|---|---|
| Fuel Type | Natural Gas | Natural Gas |
| Flow Rate | 6.8 GPM | 6.8 GPM |
| BTU | 140,000 BTU | 140,000 BTU |
| Installation Location | Indoor | Outdoor |
| Temperature Control | 95-140°F | 95-140°F |
| Certification | CSA | CSA |
| Dimensions | 7.25 x 14 x 23 inches | 7.25 x 14 x 23 inches |
| Weight | 39 pounds | 39 pounds |
| Color | Black | Black |
| Model | SH22i-NG | SH22-NG |
Frequently asked questions
Are the ECCOTEMP 6.8 GPM indoor and outdoor models the same size?
Yes, both units share identical physical dimensions. Each model measures 23 inches in length, 14 inches in width, and 7.25 inches in height. They also weigh the same amount at 39 pounds. You can expect the same footprint whether you choose the indoor SH22i-NG or the outdoor SH22-NG model.
Do both models use natural gas fuel?
Yes, both the indoor and outdoor versions run on natural gas. This fuel type is consistent across the ECCOTEMP 6.8 GPM lineup. You will need a natural gas line connection for either unit. Both models are designed to deliver high-volume hot water using this specific fuel source.
Can I install the outdoor model inside my home?
No, you should not install the outdoor model indoors. The SH22-NG is built specifically for outdoor placement. Using it inside may violate safety codes and void warranties. The indoor SH22i-NG model is the correct choice for mounting in garages, basements, or utility closets.
Do both heaters offer smart monitoring capabilities?
Yes, both models include smart features for remote management. You can use the app for energy monitoring and control. Voice command support is also available for both units. This allows you to manage your hot water system conveniently from your phone, regardless of which model you select.
What is the difference between model SH22i-NG and SH22-NG?
The primary difference is the installation location. The SH22i-NG is designed for indoor use, while the SH22-NG is built for outdoor environments. Both share the same 6.8 GPM flow rate and natural gas fuel type. Their physical specs and smart features remain identical despite the different model designations.
Is the color different between the indoor and outdoor units?
No, both units come in the same black color. The exterior finish is consistent across both the indoor and outdoor models. You will not notice a visual difference in the casing color. Both the SH22i-NG and SH22-NG feature a black finish for a uniform appearance.