Best Rheem Natural Gas Water Heaters

Finding the right water heater can feel overwhelming, especially with so many options on the market. Homeowners often face the dilemma of ensuring they have a reliable supply of hot water without incurring sky-high energy bills. Whether it’s for a bustling family or a small household, the need for consistent hot water is universal.

The best natural gas water heaters combine efficiency, reliability, and user-friendly features. When evaluating options, consider factors like capacity, BTU output, energy efficiency ratings, and installation requirements. A good choice should meet your household’s hot water demands while minimizing costs over time.

In this roundup, we’ll delve into five top-performing Rheem natural gas water heaters. Each has unique strengths and weaknesses, catering to different needs and budgets. Our recommendations include a mix of traditional tank heaters and innovative tankless models, ensuring there’s something for everyone.

Compare key specifications at a glance in the table below:

Features	Rheem G100-80	Rheem RTG 8.4 GPM	Rheem RTG 7.0 GPM	Rheem RTGH 8.4 GPM	Rheem RTG 9.5 GPM
BTU Output	75,000	180,000	160,000	157,000	199,900
Type	Tank	Tankless	Tankless	Tankless	Tankless
GPM	N/A	8.4	7.0	8.4	9.5
Energy Factor	N/A	0.82	0.82	0.93	0.82
Ideal Use	Commercial	Residential	Residential	Residential	Residential

Rheem G100-80 Natural Gas…

The Rheem G100-80 is a robust 100-gallon tank water heater designed primarily for commercial use. Its high BTU output of 75,000 makes it suitable for businesses or larger households that require a substantial amount of hot water for multiple applications. This model is ideal for restaurants, laundromats, or other facilities where hot water is essential.

This water heater stands out for its universal tank design, which allows for easy installation in various spaces. Its patented multi-flue tank design enhances efficiency, ensuring quicker heating times and consistent performance. The low-profile automatic flue damper helps save energy, reducing operational costs over time.

However, the G100-80 might not be the best choice for smaller households or residential use, as its large capacity can be overkill for typical family needs. It’s also a conventional tank model, which requires more space than tankless counterparts. Additionally, installation can be more complicated due to its size.

• 75,000 BTU output
• 100-gallon capacity
• Commercial-grade performance
• Universal tank design
• Low-profile automatic flue damper

Best for: Large commercial settings with high hot water demands.

Rheem RTG Series 8.4 GPM…

The Rheem RTG Series 8.4 GPM tankless water heater is perfect for residential use, providing endless hot water on demand. With a BTU output of 180,000, it caters to larger households, easily handling multiple outlets simultaneously. If you have several bathrooms or a busy home, this model ensures you’ll never run out of hot water.

This tankless water heater excels in energy efficiency, boasting a Uniform Energy Factor (UEF) of 0.82. This means it can save up to 34% on energy costs compared to traditional electric tank heaters. The outdoor installation option eliminates venting issues, making it a convenient choice for many homeowners.

While highly efficient, the RTG 8.4 GPM requires professional installation, which may be an added expense. Additionally, the upfront cost can be higher than traditional tank heaters, though the long-term savings often justify the investment. Users should also be aware that demand for hot water can affect performance if too many outlets are in use simultaneously.

• 180,000 BTU output
• 8.4 GPM flow rate
• Outdoor installation
• 0.82 UEF energy factor
• Continuous hot water supply

Best for: Large families needing consistent hot water.

Rheem RTG Series 7.0 GPM…

The Rheem RTG Series 7.0 GPM is another excellent tankless option, providing reliable hot water for medium-sized homes. With a BTU output of 160,000, it’s designed for households with 2-3 simultaneous showers or other hot water demands. This model is particularly suitable for smaller families or homes with moderate water usage.

This unit features an energy-efficient design with a UEF of 0.82, helping homeowners save on energy costs. Its compact, wall-mounted design frees up valuable floor space, making it a practical choice for those with limited installation areas. The built-in safety features, including freeze protection and flame failure protection, enhance user peace of mind.

One downside is that, like other tankless models, it requires professional installation. Additionally, if your household has higher hot water demands, you may find the 7.0 GPM flow rate to be limiting. It’s essential to evaluate your specific needs to determine if this model will be sufficient.

• 160,000 BTU output
• 7.0 GPM flow rate
• Compact wall-mounted design
• 0.82 UEF energy factor
• Advanced safety features

Best for: Medium-sized families with moderate hot water needs.

Rheem RTGH Series 8.4 GPM…

The Rheem RTGH Series 8.4 GPM combines efficiency and performance, making it a strong contender for indoor installations. With a BTU output of 157,000, it provides ample hot water for homes with 3-4 simultaneous showers. This model is ideal for larger families or homes with high hot water demands.

What sets this model apart is its condensing technology, which achieves a UEF of 0.93. This exceptional energy efficiency translates to lower gas bills and a reduced environmental impact. Its compact size and direct venting capabilities simplify installation, allowing for more flexibility in placement.

However, professional installation is recommended, which can add to the initial investment. While the RTGH Series is highly efficient, it may not be the best choice if your home has limited space for venting. Buyers should also consider their specific water usage patterns to ensure this model meets their needs.

• 157,000 BTU output
• 8.4 GPM flow rate
• Condensing technology
• 0.93 UEF energy factor
• Compact and efficient

Best for: Larger homes requiring high efficiency and consistent hot water.

Rheem RTG Series 9.5 GPM…

The Rheem RTG Series 9.5 GPM is a powerhouse among tankless water heaters, offering a staggering BTU output of 199,900. This model is ideal for large households or properties with multiple simultaneous hot water demands, ensuring that everyone has access to hot water when they need it.

This unit’s energy efficiency is impressive, with a UEF of 0.82, which helps keep gas bills manageable. It features a space-saving design, making it suitable for various installation spaces. Its advanced safety features and digital temperature control ensure consistent performance and user safety.

Despite these advantages, the RTG 9.5 GPM comes with a higher price tag and requires professional installation. Homeowners should also consider whether their existing gas supply can support the high BTU output. If hot water needs are moderate, this model may be more than necessary.

• 199,900 BTU output
• 9.5 GPM flow rate
• Indoor installation with direct vent
• 0.82 UEF energy factor
• Advanced safety features

Best for: Large families needing maximum hot water supply.

How We Chose These Products

Our selection process involved evaluating each water heater based on several key factors, including efficiency, capacity, BTU output, and user safety features. We focused on products that deliver reliable performance while being user-friendly and financially sensible in the long run. Each model was compared against others in its category to ensure a balanced view of their strengths and weaknesses.

We also considered real-world use cases and feedback from users, ensuring our recommendations cater to various needs. The goal was to present options that not only meet the hot water demands of different households but also align with varying budgets and installation preferences.

Buying Guide: What Really Matters

When choosing a natural gas water heater, consider the size and hot water needs of your household. Tank models are generally better for larger households with high hot water demands, while tankless models offer on-demand hot water and can save space. Look for energy efficiency ratings, as these can significantly impact long-term costs.

Installation requirements are another important factor. Some models may require professional installation, which can add to your initial costs. Additionally, consider safety features and warranties, as these can provide peace of mind and protect your investment.

Our Top Recommendation

The Rheem RTG Series 8.4 GPM stands out as our top recommendation for most homeowners. It balances high BTU output, energy efficiency, and a reliable hot water supply, making it suitable for a wide range of households. For those on a budget, the Rheem RTG Series 7.0 GPM offers great performance at a lower price point, while larger families may prefer the powerhouse capabilities of the Rheem RTG Series 9.5 GPM.

Frequently Asked Questions

How do I determine the right size water heater for my home? Consider the number of bathrooms and simultaneous hot water needs. Tank models should match your peak demand, while tankless models can provide continuous hot water based on GPM.

What maintenance do natural gas water heaters require? Regularly check for leaks, ensure proper venting, and flush the tank annually for tank models to remove sediment build-up.

Can I install a tankless water heater myself? While some homeowners may attempt DIY installation, professional installation is recommended for safety and to ensure compliance with building codes.

How long do natural gas water heaters last? On average, traditional tank water heaters last 10-15 years, while tankless models can last up to 20 years with proper maintenance.