Rheem Prestige Condensing Tankless Outdoor Review: Who It Fits and Who Should Skip It
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This rheem prestige condensing tankless outdoor review covers the Rheem RTGH-68XLN-2. It is a natural gas water heater designed for exterior mounting. The unit delivers a flow rate of 6.8 GPM. This output supports multiple simultaneous uses in larger households. Its compact footprint measures 28.5 by 9.75 by 27.5 inches. The condensing design improves efficiency by recovering heat from exhaust gases. This model prioritizes durability and performance in outdoor environments. It includes freeze protection down to -30 degrees Fahrenheit. The gray finish blends into most exterior settings. You get reliable hot water without storing it in a tank.
What stands out
- 6.8 GPM flow rate for high-demand usage
- Outdoor installation with freeze protection to -30°F
- Natural gas fuel source for efficient heating
- Water and gas leak detection with auto shut-off
- Compact dimensions: 28.5 x 9.75 x 27.5 inches
Who it fits
Good fit for
This unit suits homeowners in moderate to warm climates who need high flow rates. The 6.8 GPM output handles multiple showers and appliances. Its outdoor design frees up interior space, making it ideal for tight basements or closets. The natural gas connection works well where utility lines are already present. Freeze protection ensures reliability in colder regions, provided the unit is properly installed. You should choose this if you want a durable, high-capacity solution that operates efficiently without a large storage tank.
Who should skip it
You should skip this model if you live in an area with frequent sub-zero temperatures without proper shelter. Although it has freeze protection, extreme cold may require additional safeguards. It is not suitable for indoor installation due to venting and safety requirements. If you need an electric solution, this natural gas unit will not work. Buyers seeking a compact indoor unit with a digital display should look elsewhere. This model is strictly for exterior mounting and does not include a remote control or app connectivity.
Verdict: The Rheem RTGH-68XLN-2 is a robust outdoor choice for high-demand households. Its high flow rate and condensing efficiency make it a practical upgrade for existing gas lines.
Key specs explained for this unit
Flow Rate: 6.8 GPM
This rating indicates the maximum volume of hot water the heater can deliver per minute. A 6.8 GPM output supports multiple simultaneous uses, such as running a shower and a kitchen faucet at the same time. You should compare this figure with other models to ensure it meets the demand of your household size and fixture count.
Fuel Type: Natural Gas
This heater operates using natural gas as its energy source. You must have an existing natural gas line available at the installation site to use this unit. Compare this with propane or electric models if your home lacks a gas connection, as the fuel type determines your infrastructure requirements and potential operating costs.
Installation Location: Outdoor
This unit is designed specifically for exterior mounting and weather exposure. It includes freeze protection down to -30 degrees, allowing it to function in cold climates without indoor shelter. You must verify that your chosen spot is suitable for outdoor placement and meets local building codes for exterior appliance installation.
Dimensions: 28.5 x 9.75 x 27.5 inches
These measurements describe the physical footprint of the water heater. The compact design allows it to replace a traditional tank in tight spaces. Compare these dimensions with your available mounting area to ensure the unit fits your intended location, whether on a patio, side of a house, or in a utility closet.
Design and build overview
The Rheem Prestige RTGH-68XLN-2 features a compact, rectangular chassis finished in gray. According to the listing, the exterior shell is built for outdoor exposure. This finish protects the internal components from weather elements. You can mount it on an exterior wall without concern for rain or sun damage. The unit weighs 77 pounds. This weight suggests a sturdy internal construction. It requires a solid mounting surface to support the mass securely.
The physical footprint measures 28.5 inches in height, 9.75 inches in width, and 27.5 inches in length. This narrow profile allows for vertical installation in tight spaces. You can fit it into areas where a traditional tank would not fit. The compact design saves space compared to standard storage heaters. It is ideal for replacing old tank units in closets or utility areas.
The unit is designed specifically for outdoor installation. It includes freeze protection down to -30 degrees. This feature ensures the internal components remain safe in cold climates. You do not need to drain the unit before winter. The condensing venting system is integrated into the design. This layout directs exhaust efficiently without requiring complex external venting modifications. The overall build prioritizes durability and space efficiency for exterior use.
Setup and everyday use guide
Installing this unit requires careful planning because it is designed for outdoor mounting only. The compact dimensions of 28.5 by 9.75 by 27.5 inches allow it to fit in tight exterior spaces, but you must ensure the location is suitable for natural gas connection. The condensing venting system means you need to follow specific venting guidelines to ensure proper exhaust removal. Since the unit weighs 77 pounds, you should have assistance during the initial placement to avoid strain or damage.
Once installed, the unit operates on natural gas. You do not need to worry about freezing in cold climates because the listing states it includes freeze protection down to -30 degrees. This feature activates automatically when temperatures drop, protecting the internal components from ice damage. This makes it reliable for year-round use in regions with harsh winters.
Daily use is straightforward. The water heater provides on-demand hot water at a flow rate of 6.8 GPM. This capacity allows you to run multiple fixtures simultaneously without a significant drop in temperature. The unit also includes water and gas leak detection. If a leak is detected, the system shuts down and displays an error code. This safety feature helps prevent potential hazards. You can monitor the unit’s status through these indicators. The design prioritizes efficiency, helping you save on energy costs while providing consistent hot water for your household needs.
Before you buy this unit
Owning this unit requires attention to specific installation details. Because it is a condensing model, you must plan for proper drainage. The combustion process produces water, so a nearby drain line is essential. You also need to verify your gas line capacity. A 6.8 GPM flow rate demands sufficient gas pressure to maintain performance during peak usage times. Regular upkeep involves checking the exterior for debris. Since it sits outdoors, leaves or dirt can block airflow or vents. Keep the area clear for efficiency. This model fits well in larger homes where high flow is critical. However, if you live in an area with hard water, consider adding a whole-house filter. This protects the internal components from mineral buildup. It is one of 1 options reviewed here. It suits those who prioritize high output and outdoor placement. It may not be ideal for smaller households with lower hot water demands. Always confirm local codes allow outdoor gas installations in your specific zone.
Check before you buy
- Confirm gas line pressure meets requirements for 6.8 GPM output
- Ensure a nearby drain exists for condensation disposal
- Check local codes for outdoor gas appliance permits
- Verify space for 28.5 by 27.5 inch footprint
The product at a glance
Rheem 6.8 GPM Outdoor Condensing Water Heater
Best for: outdoor homes needing high flow and freeze safety
- Fuel Type
- Natural Gas
- Flow Rate
- 6.8 GPM
- Installation Location
- Outdoor
- Dimensions
- 28.5 x 9.75 x 27.5 inches
- Venting Type
- Condensing
- Weight
- 77 pounds
View on Amazon: Rheem 6.8 GPM Outdoor Condensing Water Heater Affiliate link
This Rheem Prestige unit delivers 6.8 GPM of hot water using natural gas. It is designed for outdoor installation and includes freeze protection down to -30 degrees. The condensing technology improves energy efficiency. It also features water and gas leak detection to shut down the unit if a problem occurs. The compact gray design saves space compared to traditional tank heaters.
Pros
- High flow rate of 6.8 GPM for multiple uses
- Freeze protection rated to -30 degrees for outdoor use
- Built-in water and gas leak detection system
- Condensing technology for high energy efficiency
Cons
- Weighs 77 pounds, requiring sturdy mounting
- Limited to natural gas fuel type only
- Requires specific outdoor venting for condensing operation
Good fit if
- You need a high-flow outdoor unit for a whole house
- You live in a cold climate and need freeze protection
- You want automatic leak detection for safety
Skip if
- You require propane or electric power sources
- You need an indoor installation model
- You have limited wall space for a 28.5-inch tall unit
Verdict: Rheem Prestige 6.8 GPM Outdoor Gas Heater suits outdoor homes needing high capacity and freeze safety. It fits users prioritizing leak detection and efficiency over indoor versatility.
Specifications side by side
| Spec | Rheem 6.8 GPM Outdoor Condensing Water Heater |
|---|---|
| Fuel Type | Natural Gas |
| Flow Rate | 6.8 GPM |
| Installation Location | Outdoor |
| Dimensions | 28.5 x 9.75 x 27.5 inches |
| Venting Type | Condensing |
| Weight | 77 pounds |
| Color | Gray |
| Model | RTGH-68XLN-2 |
Frequently asked questions
Is the Rheem Prestige 6.8 GPM suitable for large families?
Yes, it supports multiple simultaneous uses. The 6.8 GPM flow rate handles high demand. This capacity suits larger households with several bathrooms. You can run showers and faucets at the same time without significant pressure drops. It is designed for homes needing high volume output.
Does this unit require indoor venting?
No, it is designed for outdoor installation only. The condensing venting system manages exhaust efficiently outside. You must mount it on an exterior wall. Indoor installation is not recommended due to the specific venting and drainage requirements of this outdoor model.
What are the physical dimensions of the heater?
The unit measures 28.5 inches in height, 9.75 inches in width, and 27.5 inches in length. It weighs 77 pounds. The compact rectangular chassis fits in tight exterior spaces. The gray finish is built to withstand outdoor exposure and weather elements.
What fuel type does this water heater use?
It runs on natural gas. This fuel type provides consistent heating for the condensing system. You need a compatible natural gas line with sufficient capacity. The 6.8 GPM output requires adequate gas supply to maintain performance during peak usage times.
Is freeze protection included for outdoor use?
Yes, it is built for outdoor environments. The design includes freeze safety features to protect internal components. This makes it suitable for climates with cold temperatures. You can rely on its exterior-ready construction to handle seasonal weather changes without manual intervention.
Who should skip this model?
Skip it if you need indoor versatility. This unit is strictly for outdoor mounting. It also suits those prioritizing leak detection and efficiency. If you prefer indoor installation or do not need high flow rates, consider other models. It is best for outdoor homes needing high capacity.