Best Reliance Tankless Water Heaters: 2 Models Compared
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This guide compares the best reliance tankless water heaters available from Reliance. You will find compact electric units and high-output gas models in this list. The top pick is the Reliance 6 Gallon Compact Electric Water Heater because it fits small space single-sink applications. We evaluated 2 models strictly by their published specifications. Each unit is ranked based on data like capacity, fuel type, and physical dimensions. The selection focuses on practical performance metrics rather than marketing claims. You can trust these picks to match your specific hot water needs.
Quick picks
| # | Product | Best for | Price |
|---|---|---|---|
| 1 | Reliance 6 Gallon Compact Electric Water Heater Best overall | small space single-sink applications | Check price of Reliance 6 Gallon Compact Electric Water Heater on Amazon |
| 2 | Reliance 199,000 BTU Gas Tankless Water Heater Best budget | homes needing high output hot water | Check price of Reliance 199,000 BTU Gas Tankless Water Heater on Amazon |
Our 2 picks
Reliance 6 Gallon Compact Electric Water Heater
Best for: small space single-sink applications
- Capacity
- 6 Gallon
- Fuel Type
- Electric
- Dimensions
- 15.3 × 14.1 × 14.1 inches
- Weight
- 1.6 ounces
View on Amazon: Reliance 6 Gallon Compact Electric Water Heater Affiliate link
This Reliance 6-gallon compact electric water heater is designed for point-of-use applications. It features a white finish and measures 14.1 by 14.1 by 15.3 inches. The unit weighs 1.6 ounces, indicating a lightweight build. It operates on electric power and holds 4.0 gallons of usable capacity. You should consider this model for small spaces where a compact footprint is necessary.
Pros
- Compact dimensions of 14.1 x 14.1 x 15.3 inches
- Lightweight at 1.6 ounces
- Electric fuel type
- 4.0-gallon usable capacity
Cons
- Small 4.0-gallon capacity limits simultaneous use
- Banned in Idaho
- Made in Mexico
Good fit if
- You need a compact unit for a single sink
- You have limited installation space
- You require an electric-powered heater
Skip if
- You live in Idaho due to local bans
- You need high-volume hot water for multiple fixtures
- You prefer a natural gas fuel source
Verdict: Reliance 6-Gallon Compact Electric is a small, lightweight solution for single-point hot water needs. It fits well in tight spaces but cannot support high-demand households.
Reliance 199,000 BTU Gas Tankless Water Heater
Best for: homes needing high output hot water
- Fuel Type
- Natural Gas, Propane
- BTU
- 199,000 BTU
- Installation Location
- Indoor/Outdoor
- Dimensions
- 11 x 11 x 18 inches
- Weight
- 8.5 pounds
View on Amazon: Reliance 199,000 BTU Gas Tankless Water Heater Affiliate link
The Reliance X3-199 delivers 199,000 BTU of hot water using natural gas or propane. Its compact 11 x 11 x 18 inch frame fits tight spaces. You get a digital display for scheduling and remote control access. The unit weighs just 8.5 pounds and supports indoor or outdoor mounting. It includes a 15-year heat exchanger warranty for long-term reliability.
Pros
- 199,000 BTU output for strong performance
- Compact 11 x 11 x 18 inch dimensions
- Digital display with dual recirculation programming
- Remote control capability included
- 15-year limited heat exchanger warranty
Cons
- Requires professional gas venting for installation
- No built-in Wi-Fi for smartphone app control
- Heavier than compact electric models
Good fit if
- You need high BTU output for multiple fixtures
- You want remote control without a smartphone app
- You need indoor or outdoor flexibility
Skip if
- You require a plug-in electric unit
- You want a completely silent operation
- You need a unit under 10 inches wide
Verdict: Reliance X3-199 Natural Gas Heater offers strong 199,000 BTU performance in a small frame for homes needing reliable hot water. It suits users who value remote scheduling and long warranty coverage over app connectivity.
Specifications side by side
| Spec | Reliance 6 Gallon Compact Electric Water Heater | Reliance 199,000 BTU Gas Tankless Water Heater |
|---|---|---|
| Fuel Type | not stated | Natural Gas, Propane |
| BTU | not stated | 199,000 BTU |
| Installation Location | not stated | Indoor/Outdoor |
| Capacity | 6 Gallon | not stated |
| Dimensions | not stated | 11 x 11 x 18 inches |
| Weight | 1.6 ounces | 8.5 pounds |
| Size | 6 Gallon | not stated |
| Color | White | White |
| Model | 6-6-SOMS K | X3-199 |
Reliance Tankless Models Overview
Reliance offers distinct options based on fuel type and capacity. The Reliance 6 Gallon Compact Electric Water Heater uses electric power and measures 14.1 inches wide. It suits small space single-sink applications. The unit weighs 1.6 ounces and features a white finish. This model is ideal for tight installations where gas lines are unavailable. It provides single-point hot water efficiently without requiring complex venting.
For higher demand, the Reliance 199,000 BTU Gas Tankless Water Heater delivers strong natural gas performance. It measures 11 inches wide and 18 inches high. This model suits homes needing high output hot water. It weighs 8.5 pounds and also comes in white. Shoppers comparing fuel types will note the electric unit’s compactness versus the gas model’s BTU power. Choose based on your available energy source and hot water needs.
Who Reliance Models Suit
Reliance covers two distinct needs. The compact electric 6-gallon unit serves small space single-sink applications. It fits tight spots with its 14.1-inch width. The gas X3-199 handles high output hot water for homes. It delivers 199,000 BTU in a small frame. This range suits users who want either basic single-point heating or strong whole-home gas power. You will not find mid-size hybrid options here. The gap between small electric storage and high-output gas is wide. Choose based on your primary fuel source and demand level.
How to choose the right one
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Check fuel type needs
You must match the heater to your home’s existing utility infrastructure. Reliance offers distinct models for electric and natural gas connections. If you have a gas line, the X3-199 delivers 199,000 BTU for high output. This model suits homes needing reliable hot water flow. Electric units require specific wiring and circuit capacity. Verify your power supply before selecting an electric model. Choosing the wrong fuel type leads to installation failures. Ensure your home supports the chosen energy source for safe operation.
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Assess space constraints
Physical dimensions dictate where you can install the unit. The compact electric model measures 14.1 inches wide and 14.1 inches high. Its small footprint fits well in tight spaces like closets or under sinks. The gas model is slightly taller at 18 inches but remains narrow. Measure your intended installation area carefully. Ensure you have clearance for maintenance access. The electric unit weighs very little, simplifying mounting. The gas unit is heavier, requiring sturdy wall support. Plan your layout around these exact measurements.
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Define usage scope
Identify how many fixtures need hot water simultaneously. The 6-gallon electric unit is designed for small space single-sink applications. It provides limited capacity and cannot support high-demand households. If you need hot water for multiple sinks or showers, this unit will fall short. The gas model offers higher output for broader household needs. Consider your daily hot water habits. Single-sink setups in utility rooms or guest baths suit the compact electric option. Larger families may require the higher output of the gas model.
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Verify weight limits
Wall mounting strength depends on the unit’s weight. The compact electric heater weighs only 1.6 ounces, making it extremely light. This allows for simple installation on various wall types. The gas model weighs 8.5 pounds, requiring more robust mounting hardware. Check your wall structure to ensure it can support the load. Drywall alone may not suffice for the gas unit without proper anchors. Lighter units offer flexibility in placement. Heavier units need secure, level mounting surfaces to prevent damage over time.
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Review warranty coverage
Long-term reliability depends on manufacturer support. The gas X3-199 model is noted for long warranty coverage. This provides peace of mind for major components. Check the specific warranty terms for each model before purchasing. Warranty length often correlates with build quality and expected lifespan. Ensure you understand what is covered and for how long. Proper maintenance can extend the life of your unit. Review the warranty details to protect your investment against manufacturing defects.
Frequently asked questions
Which Reliance model is best for a single sink?
The Reliance 6 Gallon Compact Electric Water Heater is the top choice for small space single-sink applications. This unit measures 14.1 inches wide and 14.1 inches tall. It provides a compact footprint that fits into tight spots. The electric design makes it suitable for locations without gas lines.
Does Reliance offer a gas tankless water heater?
Yes, Reliance offers the X3-199 Natural Gas Heater. This model delivers 199,000 BTU of output for homes needing high output hot water. It features a white finish and measures 11 inches wide. The unit weighs 8.5 pounds, making it manageable for installation in various settings.
What is the size of the Reliance 6-gallon unit?
The Reliance 6 Gallon Compact Electric Water Heater measures 14.1 inches in width and 14.1 inches in height. The length is 15.3 inches. These dimensions allow it to fit well in small spaces. The unit is designed for single-point hot water needs rather than whole-house supply.
How much does the Reliance gas heater weigh?
The Reliance X3-199 Natural Gas Heater weighs 8.5 pounds. This lightweight design aids in installation and mounting. The unit measures 11 inches wide and 18 inches tall. Its compact frame supports high output performance without requiring excessive floor or wall space.
Can the Reliance 6-gallon heater support a whole house?
No, the Reliance 6 Gallon Compact Electric Water Heater cannot support high-demand households. It is designed for small space single-sink applications. The 4.0-gallon capacity limits its ability to provide simultaneous hot water to multiple fixtures. You should use it for isolated sinks or small bathrooms.
What fuel types are available from Reliance?
Reliance offers both electric and natural gas options. The 6 Gallon Compact Electric model uses electric power. The X3-199 model runs on natural gas. You must match the heater to your home’s existing utility infrastructure. Electric units suit locations without gas lines, while gas models provide higher output.
Is the Reliance X3-199 suitable for high-demand homes?
Yes, the Reliance X3-199 is suitable for homes needing high output hot water. It delivers 199,000 BTU of heating power. This high output supports multiple fixtures simultaneously. The unit is designed for users who value strong performance and reliable hot water supply in larger households.
What color are Reliance tankless water heaters?
Both the Reliance 6 Gallon Compact Electric and the X3-199 Natural Gas Heater feature a white color. This neutral finish allows the units to blend into various utility spaces. The white exterior is consistent across the brand’s compact and high-output models listed in this comparison.