Rheem RTG 70XLP Tankless Water Heater Review

Imagine stepping into a shower after a long day, only to find that your hot water has run out. This frustrating scenario is common for many households relying on traditional tank water heaters. Thankfully, tankless water heaters like the Rheem RTG 70XLP series offer a solution that ensures you have hot water whenever you need it, without the limitations of a storage tank.

A great tankless water heater should provide reliable performance, energy efficiency, and the capability to serve multiple outlets at once. With advancements in technology, modern units are designed to be more efficient and user-friendly. The best models offer features such as digital temperature controls, safety systems, and various installation options to suit different home layouts.

This review will guide you through the top picks in the Rheem RTG 70XLP tankless water heater lineup. We will look closely at five models, considering their unique features, ideal use cases, and any limitations. Whether you need an indoor or outdoor unit, this guide will help you make an informed choice.

For quick comparisons, see the table below:

Features	Rheem RTG 70XLP Outdoor	Rheem RTG 70XNP Indoor	Rheem RTG 70XLP Indoor	Rheem RTG 70XN Outdoor	Rheem RTG 84XNP Outdoor
Fuel Type	Liquid Propane	Natural Gas	Liquid Propane	Natural Gas	Natural Gas
Max Output	160,000 BTU	160,000 BTU	160,000 BTU	160,000 BTU	180,000 BTU
GPM	7.0 GPM	7.0 GPM	7.0 GPM	7.0 GPM	8.4 GPM
Energy Factor	0.82 UEF	0.82 UEF	0.82 UEF	0.82 UEF	0.82 UEF
Safety Features	Yes	Yes	Yes	Yes	Yes

Rheem RTG Series 7.0 GPM…

The Rheem RTG Series 7.0 GPM Liquid Propane Tankless Water Heater is designed for outdoor use and is ideal for larger households. With a 160,000 BTU output, this model can efficiently provide hot water for 2-3 simultaneous showers, making it a great choice for families with multiple bathrooms.

This unit stands out for its high energy efficiency, boasting a Uniform Energy Factor (UEF) of 0.82. This means it can save you up to 34% on energy costs compared to traditional 50-gallon electric tank heaters. Its outdoor installation eliminates the need for complicated venting, reducing installation time and costs.

However, being an outdoor unit, it may not be suitable for every home, especially in areas with extreme weather conditions. Additionally, professional installation is required, which can add to the upfront costs. Nevertheless, the long-term energy savings and convenience make it a worthwhile investment.

• Fuel: Liquid Propane
• Max Output: 160,000 BTU
• Flow Rate: 7.0 GPM
• Energy Factor: 0.82 UEF
• Safety Features: Multi-point safety system

Best for: Large families needing reliable hot water outdoors.

Rheem RTG Series 7.0 GPM…

The Rheem RTG Series 7.0 GPM Natural Gas Tankless Water Heater is tailored for indoor installation, making it an excellent option for homes where outdoor space is limited. Like its propane counterpart, this model delivers a powerful 160,000 BTU output, ensuring a steady supply of hot water for multiple outlets.

This unit’s standout feature is its direct venting system, which allows for flexible installation in various indoor settings. Additionally, it integrates advanced safety features, including LeakGuard for leak detection and prevention, safeguarding your home from potential water damage.

One limitation to consider is the need for proper venting, which can complicate installation if your home lacks the necessary infrastructure. Furthermore, while the unit is energy-efficient, its performance can vary in colder climates, where incoming water temperatures significantly drop.

• Fuel: Natural Gas
• Max Output: 160,000 BTU
• Flow Rate: 7.0 GPM
• Energy Factor: 0.82 UEF
• Safety Features: LeakGuard technology

Best for: Homes needing an efficient indoor hot water solution.

Rheem RTG Series 7.0 GPM…

The Rheem RTG Series 7.0 GPM Liquid Propane Tankless Water Heater Indoor model offers the same impressive performance as its outdoor counterpart, but with the added benefit of being designed for indoor use. This model is perfect for homes that require an efficient hot water solution without sacrificing space.

This unit excels in providing instant hot water on demand, supporting multiple simultaneous uses, such as showers and dishwashing. Its durable construction and advanced safety features ensure reliable performance over the years. The included digital LED temperature control panel allows precise temperature adjustments, enhancing user convenience.

However, like other indoor units, it requires proper venting to ensure safe operation, which could complicate installation in certain homes. Additionally, the reliance on propane may not suit all buyers, particularly those in areas with limited propane access or high costs.

• Fuel: Liquid Propane
• Max Output: 160,000 BTU
• Flow Rate: 7.0 GPM
• Energy Factor: 0.82 UEF
• Safety Features: Precise temperature control

Best for: Indoor spaces needing efficient hot water without the footprint of a tank.

Rheem RTG Series 7.0 GPM…

The Rheem RTG Series 7.0 GPM Natural Gas Tankless Water Heater Outdoor variant is another excellent choice for outdoor installation. This model, similar to the other Rheem offerings, provides an impressive 160,000 BTU output, ensuring that hot water is readily available for large households.

What makes this model unique is its straightforward installation, thanks to the absence of venting requirements. This feature can save you time and money during the setup process. Furthermore, its energy efficiency helps in reducing utility bills without compromising performance.

On the downside, homeowners in colder climates might face challenges with performance during peak usage times, particularly in winter months when incoming water temperatures drop. Additionally, outdoor units might be more susceptible to extreme weather conditions, potentially affecting their longevity.

• Fuel: Natural Gas
• Max Output: 160,000 BTU
• Flow Rate: 7.0 GPM
• Energy Factor: 0.82 UEF
• Safety Features: Multi-point safety system

Best for: Homes with outdoor space and no venting requirements.

Rheem RTG Series 8.4 GPM…

The Rheem RTG Series 8.4 GPM Natural Gas Tankless Water Heater Outdoor model stands out with a higher output of 180,000 BTU, making it suitable for larger families or homes with higher hot water demands. This model is ideal for those who need simultaneous hot water for multiple showers and appliances.

Its energy efficiency remains on par with the other models, offering a UEF of 0.82, which helps keep utility bills manageable. The outdoor design and durable metal cabinet make it resilient against various weather conditions, ensuring it can withstand the elements.

However, the increased output does come at a cost; it may require a more complex installation process, especially in homes without existing gas lines. Additionally, while the outdoor design is beneficial for saving space indoors, it might not be suitable for areas prone to extreme weather.

• Fuel: Natural Gas
• Max Output: 180,000 BTU
• Flow Rate: 8.4 GPM
• Energy Factor: 0.82 UEF
• Safety Features: Enhanced safety systems

Best for: Large households requiring maximum hot water output.

How We Chose These Products

Our selection process involved evaluating the most critical factors for tankless water heaters, including energy efficiency, output capacity, installation requirements, and safety features. We focused on models that deliver high performance while being user-friendly and suitable for various household sizes and configurations.

We also took into account real user feedback and expert reviews to identify strengths and weaknesses of each model. This holistic approach ensures that our recommendations align with the practical needs of homeowners looking for reliable hot water solutions.

Buying Guide: What Really Matters

When choosing a tankless water heater, consider the fuel type that suits your home’s infrastructure (natural gas or propane). This choice can significantly impact installation costs and convenience. Additionally, assess your household’s hot water needs, particularly the flow rate (GPM) and BTU output. Larger families may require higher output units for simultaneous usage.

Energy efficiency is another key factor; models with higher UEF ratings will save you money in the long run. Also, pay attention to safety features and installation requirements, particularly for indoor units that may need proper venting. Understanding these aspects will help you make an informed decision.

Our Top Recommendation

For families needing a reliable hot water solution, the Rheem RTG Series 8.4 GPM Natural Gas Tankless Water Heater is the best choice. Its higher BTU output makes it suited for large households with multiple hot water demands. For those on a budget or with smaller needs, the Rheem RTG Series 7.0 GPM models provide excellent performance and energy savings without breaking the bank.

Frequently Asked Questions

Can I install a tankless water heater myself? Installation usually requires a qualified professional, especially for gas units due to safety regulations.

How long do tankless water heaters last? With proper maintenance, tankless water heaters can last up to 20 years or more.

Do tankless water heaters save money? Yes, they are more energy-efficient than traditional tank heaters, leading to lower utility bills over time.

What maintenance do tankless water heaters need? Regular descaling and checking filters are essential for optimal performance and longevity.