Best 40 Gallon Liquid Propane Water Heaters

Choosing the right water heater is crucial for any household. Many homeowners face the challenge of selecting a reliable system that can meet their daily hot water needs while ensuring efficiency and durability. When it comes to liquid propane water heaters, a 40-gallon model strikes a balance between size and capacity, making it a popular choice for families and smaller homes.

A great 40-gallon liquid propane water heater should offer quick heating, low emissions, and a long lifespan. Additionally, features like sediment control and easy ignition can significantly enhance user experience. The market offers several options, but knowing what to look for can simplify your decision.

In this roundup, we’ve evaluated the best 40-gallon liquid propane water heaters available, considering their unique features, performance, and suitability for various needs. Our top picks range from reliable brands like Rheem and A.O. Smith to innovative solutions like tankless models. Read on to find the best option for your home.

Here’s a quick comparison of key specifications:

Features	Rheem PROG50-36P	A.O. Smith GCR-40LP	Noritz EZTR40LP	Rheem RTGH Series	Rheem RTG Series
Capacity	50 Gallons	40 Gallons	40 Gallons	Tankless	Tankless
BTU Output	36,000 BTU	High Efficiency	6.6 GPM	199,900 BTU	160,000 BTU
Efficiency	Low Emissions	Blue Diamond Coating	Endless Hot Water	Ultra-Low NOx	High Efficiency
Special Features	EverKleen System	Self-Powered Valve	Direct Replacement	Digital Control	Outdoor Installation
Best Use Case	Residential Use	Small Families	Home Replacement	Large Families	Multi-Bath Homes

Rheem PROG50-36P RH62 Pro…

The Rheem PROG50-36P is a robust 50-gallon propane water heater, ideal for medium to large households needing a dependable hot water supply. Its atmospheric system makes it suitable for homes without extensive venting requirements.

This model stands out due to its low emissions, complying with stringent Knox requirements. The patented EverKleen system prevents sediment buildup, ensuring long-lasting performance. Users appreciate its easy ignition system, which eliminates the need for matches, making start-up a breeze.

On the downside, while it offers excellent performance, the 50-gallon capacity may be overkill for smaller households, leading to energy waste. Some users also report that installation can be somewhat complex, requiring professional assistance.

• Capacity: 50 Gallons
• BTU Output: 36,000 BTU
• Low Emissions
• EverKleen Sediment Control
• Ideal for Residential Use

Best for: Families needing reliable hot water in medium-sized homes.

A.O. Smith GCR-40LP ProMa…

The A.O. Smith GCR-40LP is a high-efficiency propane water heater designed for smaller families or homes with moderate hot water demands. Its compact size makes it a convenient choice for those limited on space.

This model is distinguished by its Blue Diamond glass coating, which offers superior corrosion resistance compared to standard glass linings. The self-powered electronic gas valve enhances its efficiency, utilizing thermopile technology to operate without external power. This feature is particularly beneficial in areas prone to power outages.

However, some users find the initial setup complicated, especially if they are unfamiliar with gas installations. Additionally, while the 40-gallon capacity suits small households, larger families may find themselves needing more hot water.

• Capacity: 40 Gallons
• Self-Powered Electronic Valve
• Blue Diamond Coating
• Dynaclean Diffuser Tube
• Compact Size

Best for: Small families looking for efficient hot water solutions.

Noritz EZTR40LP 40 gal Ta…

The Noritz EZTR40LP is an innovative tank replacement water heater designed for those wanting the benefits of tankless hot water without the hassle of installation modifications. It’s perfect for homeowners looking to upgrade from a traditional tank system.

This model excels in providing endless hot water, which is ideal for larger families or homes with multiple bathrooms. Its high efficiency rating ensures that energy costs remain manageable while delivering on demand hot water.

One limitation is that while it offers great performance, users may need to ensure their existing infrastructure can support the transition from a tank to a tankless system, which could incur additional costs. Moreover, some users report a learning curve associated with adjusting to the tankless system.

• Capacity: 40 Gallons
• Endless Hot Water
• High Efficiency
• Direct Replacement for Tanks
• Low NOx Emissions

Best for: Homeowners upgrading from traditional systems to tankless.

Rheem RTGH Series 9.5 GPM…

The Rheem RTGH Series is a powerful tankless water heater, ideal for families needing continuous hot water on demand. This model is particularly beneficial for homes with high hot water demands, such as those with multiple bathrooms.

Its impressive 199,900 BTU output ensures rapid heating, while the 9.5 GPM flow rate supports multiple simultaneous uses without a hitch. The digital LED temperature control allows for precise adjustments, catering to user preferences and needs.

On the downside, this model requires professional installation due to its complexity. Additionally, the upfront cost is typically higher than traditional tank models, which might deter some budget-conscious buyers.

• Flow Rate: 9.5 GPM
• BTU Output: 199,900 BTU
• Ultra-Low NOx Emissions
• Digital Temperature Control
• Professional Installation Recommended

Best for: Large families needing high-capacity hot water solutions.

Rheem RTG Series 7.0 GPM…

The Rheem RTG Series offers a compact tankless solution for those seeking efficient hot water delivery. This model is particularly suited for outdoor installations, making it a versatile option for various home layouts.

With a flow rate of 7.0 GPM, it provides enough hot water for multiple uses simultaneously, ideal for smaller families or homes with moderate hot water needs. The built-in freeze protection adds an extra layer of reliability for outdoor setups.

However, it may not be suitable for larger households with high demand, as its capacity could limit simultaneous use. Some users also mention that installation can be a bit tricky for those without prior experience.

• Flow Rate: 7.0 GPM
• BTU Output: 160,000 BTU
• Outdoor Installation
• Built-in Freeze Protection
• Energy Efficient Design

Best for: Smaller families with moderate hot water needs.

How We Chose These Products

Our selection process involved researching various 40-gallon liquid propane water heaters, focusing on reliability, efficiency, and user feedback. We considered factors like BTU outputs, energy efficiency ratings, and unique features that enhance usability. Customer reviews and expert opinions were critical in determining which models truly deliver value.

We also evaluated installation ease and maintenance requirements, as these can significantly impact user satisfaction. The final list reflects products that represent the best balance of performance, durability, and user-friendliness, ensuring you can make an informed choice.

Buying Guide: What Really Matters

When searching for a 40-gallon liquid propane water heater, consider the capacity you need. Larger households may require higher BTU outputs to meet simultaneous hot water demands. Also, check for energy efficiency ratings, as these will affect long-term operating costs.

Don’t overlook installation requirements. Some models are straightforward, while others may need professional help. Additionally, look for features like sediment control systems and warranties, which can offer peace of mind and potentially lower maintenance costs in the future.

Our Top Recommendation

The Rheem PROG50-36P stands out as our top choice for its reliability, low emissions, and ease of use. It’s an excellent fit for families needing consistent hot water without the worry of maintenance issues. For those on a tighter budget, the A.O. Smith GCR-40LP provides efficient performance without sacrificing quality.

Frequently Asked Questions

What is the lifespan of a propane water heater? Most propane water heaters last about 10-15 years with proper maintenance.

How often should I flush my propane water heater? It’s recommended to flush your water heater at least once a year to prevent sediment buildup.

Can I convert my electric water heater to propane? Yes, but it requires specific conversion kits and professional installation.

What size propane tank do I need? A typical 40-gallon water heater works well with a 100-gallon propane tank for consistent supply.