Choosing the best propane tankless hot water heater can save you space, energy, and money. These on-demand systems heat water instantly, providing endless hot showers and efficient performance for your home. Our expert team tested and compared top models to help you find the perfect fit for your needs and budget.
In This Article
- 1 Quick Product Comparison
- 2 Our Top 10 Best Propane Tankless Hot Water Heater Reviews – Expert Tested & Recommended
- 2.1 1. APUS Tankless Water Heater Propane Gas, Up to 4.42 GPM, Indoor Hot Water Heater, 95,000 BTU on De…
- 2.2 2. HYDRO MASTER Tankless Water Heater Service Valve Kit with Pressure Relief Valve and 3/4-Inch IPS Iso…
- 2.3 3. 102000 BTU Tankless Water Heater Propane, Max 4.3 GPM Intelligent Constant Indoor Gas Instant Wat…
- 2.4 4. Water Heater Tankless, VANSTON Propane Water Heater Outdoor, 10L 2.64 Portable Water Heaters, Ins…
- 2.5 5. Ranein Propane Tankless Water Heater for Indoor Use with 3.6 GPM Flow Rate and 80,000 BTU Output
- 2.6 6. Ranein Propane Gas Tankless Water Heater with Vent Pipe, Indoor Max 4.3 GPM, 100,000 BTU Instant …
- 2.7 7. Propane Tankless Water Heater for Indoor Use with 4.74 GPM Flow Rate and Multi-Protection Features…
- 2.8 8. NEW Rinnai RX199iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater, Indoor or…
- 2.9 9. Propane Tankless Water Heater for Indoor Use with 4.21 GPM Flow Rate and Multi-Protection Systems…
- 2.10 10. 2025 GEN II Ranein Propane Gas Tankless Water Heater Max 5.3 GPM, 130,000 BTU Indoor On Demand In…
- 3 Complete Buying Guide for Best Propane Tankless Hot Water Heater
- 4 Frequently Asked Questions
Quick Product Comparison
Our Top 10 Best Propane Tankless Hot Water Heater Reviews – Expert Tested & Recommended
1. APUS Tankless Water Heater Propane Gas, Up to 4.42 GPM, Indoor Hot Water Heater, 95,000 BTU on De…
This APUS propane tankless hot water heater delivers powerful performance with a 95,000 BTU capacity and up to 4.42 GPM flow. It’s designed for indoor use and ensures steady hot water for multiple taps.
Key Features That Stand Out
- ✓ 95,000 BTU heating capacity with 4.42 GPM high flow rate
- ✓ Precise temperature control within ±1°F using smart CPU tech
- ✓ Oxygen-free copper heat exchangers for durability
- ✓ Segmented combustion technology for high efficiency
Why We Recommend It
We love its consistent temperature and robust build. It handles simultaneous showers and laundry without a hitch, making it ideal for busy households.
Best For
Medium to large homes needing reliable, endless hot water for daily use.
Pros and Cons
Pros:
- High flow rate supports multiple fixtures
- Very accurate temperature stability
- Energy-efficient with modern combustion tech
- Durable copper components extend lifespan
Cons:
- May require professional installation for optimal performance
- Slightly higher upfront cost compared to basic models
Customer Reviews
Customer Review: “My parents decided to switch to a tankless water heater. We have a medium-sized household, and the high output easily keeps up with showers, laundry, and the kitchen running at the same time. The water heats up fast and stays consistent. There are no more sudden cold bursts like we used to get with…”
Customer Review: “Usually don’t write reviews but this is an acception. Me and my wife have been living in a barndominioum since we’ve been building our house. About 8 years. We’ve had 2 other water heaters installed since then and so we have some experience with them. We’ve generally used the camp type water heater th…”
2. HYDRO MASTER Tankless Water Heater Service Valve Kit with Pressure Relief Valve and 3/4-Inch IPS Iso…
This HYDRO MASTER valve kit is essential for installing or maintaining your propane tankless hot water heater. It includes isolation valves and a pressure relief valve for safe, leak-free connections.
Key Features That Stand Out
- ✓ Durable forged lead-free brass construction
- ✓ All-in-one kit with hot/cold isolation and pressure relief valves
- ✓ Full port ball valves for maximum flow
- ✓ Wide compatibility with major tankless water heater brands
Why We Recommend It
It simplifies installation and enhances safety. The quality valves prevent leaks and ensure your system runs smoothly.
Best For
DIY enthusiasts or pros installing or upgrading a tankless water heater system.
Pros and Cons
Pros:
- High-quality, leak-proof materials
- Comprehensive kit reduces extra purchases
- Easy to install with standard tools
- Compatible with many heater brands
Cons:
- Not a heater itself, so needs to be paired with a unit
- May be overkill for very simple setups
Customer Reviews
Customer Review: “I recently installed the Hydro Master Tankless Water Heater Valve Kit, and I’m thoroughly impressed with its performance. This kit made the installation of my tankless water heater incredibly easy and hassle-free. The valves are of excellent quality, providing a secure and leak-free connection to th…”
Customer Review: “I bought an electric tankless Stiebel Eltron Tempra 36pro water heater and used this heavy duty, solid brass, 3-valves set of hot, cold, and pressure release valves that came with the correct gaskets, so I didn’t have to buy them separately. The valves fit perfectly straight out of the box. These so…”
3. 102000 BTU Tankless Water Heater Propane, Max 4.3 GPM Intelligent Constant Indoor Gas Instant Wat…
This budget-friendly propane tankless hot water heater offers 102,000 BTU and 4.3 GPM flow. It features smart energy-saving tech and anti-freeze protection for year-round use.
Key Features That Stand Out
- ✓ 102,000 BTU heating capacity with 4.3 GPM flow
- ✓ 4-stage energy-saving combustion technology
- ✓ Multiple anti-freeze protection for winter
- ✓ Intelligent staged combustion for efficiency
Why We Recommend It
It delivers great value without sacrificing performance. The anti-freeze features make it reliable in cold climates.
Best For
Cost-conscious buyers seeking efficient hot water for small to medium homes.
Pros and Cons
Pros:
- High BTU output at an affordable price
- Energy-efficient with staged combustion
- Excellent winter protection against freezing
- Quiet operation according to users
Cons:
- Flow rate may drop slightly in very cold inlet water
- Installation instructions could be clearer
Customer Reviews
Customer Review: “This is just what the doctor ordered. The heater coil in my boiler plugged up solid so I was able to tie this in to the water lines fairly easily and cap off the old heater coil. Has the power to make never ending hot water but if you are not used to on demand water heaters keep in mind it will take…”
Customer Review: “Hooked it up and works like a charm, plenty of hot water and very quiet when running”
4. Water Heater Tankless, VANSTON Propane Water Heater Outdoor, 10L 2.64 Portable Water Heaters, Ins…
This VANSTON propane tankless hot water heater is portable and perfect for outdoor use. It provides 2.64 GPM of instant hot water with 68,100 BTU for camping or remote locations.
Key Features That Stand Out
- ✓ Portable design, weighs only 21 lbs for easy carrying
- ✓ Instant hot water with 68,100 BTU/hr output
- ✓ Starts at low water pressure (20 PSI)
- ✓ Versatile for outdoor showers, cabins, and RVs
Why We Recommend It
Its compact size and low pressure start make it ideal for off-grid adventures. You get hot water anywhere with propane.
Best For
Campers, RV owners, or anyone needing hot water in remote outdoor settings.
Pros and Cons
Pros:
- Lightweight and easy to transport
- Works well with low water pressure
- Quick hot water delivery
- Great for temporary or mobile setups
Cons:
- Lower flow rate than indoor models
- Not designed for whole-house heating
Customer Reviews
Customer Review: “This u it is great instant hot water on yhe outdoor shower.”
Customer Review: “We use this as an outdoor shower at the lake. It works great so far. Very automated”
5. Ranein Propane Tankless Water Heater for Indoor Use with 3.6 GPM Flow Rate and 80,000 BTU Output
This Ranein propane tankless hot water heater offers 80,000 BTU and 3.6 GPM for indoor use. It eliminates wait time and has four preset modes for different needs.
Key Features That Stand Out
- ✓ 80,000 BTU heating capacity with 3.6 GPM flow
- ✓ No waiting required; hot water on demand
- ✓ Four preset modes: Dish, Fruit, Elderly, Infant
- ✓ Energy-efficient compared to tank heaters
Why We Recommend It
The preset modes make it user-friendly for various household tasks. It’s a solid upgrade from traditional tank heaters.
Best For
Small to medium households looking to switch from a tank to tankless system.
Pros and Cons
Pros:
- Convenient preset temperature modes
- Good flow rate for single-family use
- Cost-effective over time with energy savings
- Compact design saves space
Cons:
- May struggle with very high simultaneous demand
- Installation can be tricky for beginners
Customer Reviews
Customer Review: “My twenty year old 40 gallon (traditional) hot water heater finally sprung a massive leak, leading me to research LPG heaters that were available. My recollection is that the heater cost around $300 in 2005.The local big box hardware chains had heaters that began around 800 and seemed to accelerate…”
Customer Review: “The media could not be loaded.2nd edit!—— it’s been almost a year and want to say through the winter I was almost certain it was going to be broken with the water frozen even inside the house, we had issues with the gas company (propane) blot being able to come fill so we went without heat off and o…”
6. Ranein Propane Gas Tankless Water Heater with Vent Pipe, Indoor Max 4.3 GPM, 100,000 BTU Instant …
This Ranein model includes a vent pipe and offers 100,000 BTU with 4.3 GPM flow. It has smart features like four-season function and kitchen-friendly settings.
Key Features That Stand Out
- ✓ 100,000 BTU heating capacity with 4.3 GPM flow
- ✓ Four-season function auto-adjusts temperature
- ✓ Kitchen function for lower temperature needs
- ✓ Includes vent pipe for proper indoor installation
Why We Recommend It
The vent pipe inclusion makes installation easier, and the seasonal adjustment ensures comfort year-round.
Best For
Homes needing a reliable indoor heater with venting included for safety.
Pros and Cons
Pros:
- Higher BTU for better performance
- Smart seasonal temperature control
- Vent pipe included saves money
- Good for kitchens and bathrooms
Cons:
- Vent installation requires careful planning
- May be noisy during ignition for some users
Customer Reviews
Customer Review: “My twenty year old 40 gallon (traditional) hot water heater finally sprung a massive leak, leading me to research LPG heaters that were available. My recollection is that the heater cost around $300 in 2005.The local big box hardware chains had heaters that began around 800 and seemed to accelerate…”
Customer Review: “The media could not be loaded.2nd edit!—— it’s been almost a year and want to say through the winter I was almost certain it was going to be broken with the water frozen even inside the house, we had issues with the gas company (propane) blot being able to come fill so we went without heat off and o…”
7. Propane Tankless Water Heater for Indoor Use with 4.74 GPM Flow Rate and Multi-Protection Features…
This propane tankless hot water heater boasts a high 4.74 GPM flow rate and 68,000 BTU. It has multiple safety protections and a stainless steel body for durability.
Key Features That Stand Out
- ✓ 4.74 GPM flow rate with 68,000 BTU output
- ✓ Steady temperature control and flame failure protection
- ✓ Stainless steel body for corrosion resistance
- ✓ Energy-efficient on-demand heating
Why We Recommend It
Its high flow rate is great for larger households, and the safety features provide peace of mind.
Best For
Families needing high-volume hot water with robust safety features.
Pros and Cons
Pros:
- Excellent flow rate for multiple showers
- Strong safety protections included
- Durable stainless steel construction
- Consistent hot water delivery
Cons:
- BTU is lower relative to flow, may affect very cold climates
- Temperature display in Celsius only, which some users find inconvenient
Customer Reviews
Customer Review: “Great unit that works well above my needs (1 bath trailer house) I was sceptical for the price but have been very happy with it after 2 weeks of use, showers stay hot and consistent, handles all washing machine needs, runs 20 minutes continuously with a 1 minute recovery in between. On the longer se…”
Customer Review: “This replaced a much more expensive Ecotemp i12 tankless water heater which was NEVER good. For one thing it whistled at times so loud you could hear it 30 yards away from the house. Also their customer service NEVER responded to questions. This one has only one drawback. It reads in Celsius (Centig…”
8. NEW Rinnai RX199iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater, Indoor or…
This Rinnai propane tankless hot water heater is a premium model with smart features. It works indoors or outdoors and uses condensing tech for efficiency.
Key Features That Stand Out
- ✓ Versatile installation: indoor or outdoor
- ✓ Condensing technology for high efficiency
- ✓ Smart Sense interface with Quick Flush feature
- ✓ Compatible with propane or natural gas
Why We Recommend It
It’s a top-tier heater from a trusted brand. The flexibility and smart features make it worth the investment.
Best For
Homeowners seeking a high-efficiency, durable heater with advanced options.
Pros and Cons
Pros:
- Excellent energy efficiency
- Flexible installation locations
- User-friendly smart controls
- Reliable brand reputation
Cons:
- Higher price point
- Professional installation recommended
Customer Reviews
Customer Review: “We are a big family. 5 grown adults. The Hot Water Tank we had (A.O. Smith, 50 gallon) had come with the house. If I am not mistaken, it was from 2004. We knew it would need replacing at some point…we just prayed it wasn’t gonna die —but it did. During Tornado Season. We had a tornado tear thr…”
Customer Review: “Wonderful replacement for our electric water heater. Our electric water heater sprang a leak so we decided to spend the bucks and go tankless. We had a propane tank already. Installation was straight forward and doable as a DIY project if you know something about plumbing. This water heater is v…”
9. Propane Tankless Water Heater for Indoor Use with 4.21 GPM Flow Rate and Multi-Protection Systems…
This propane tankless hot water heater provides 4.21 GPM and 68,000 BTU with multi-protection systems. It’s built with stainless steel for long-lasting performance.
Key Features That Stand Out
- ✓ 4.21 GPM flow rate with 68,000 BTU output
- ✓ Multi-protection systems for safety
- ✓ Stainless steel body for durability
- ✓ Steady temperature control
Why We Recommend It
It balances flow and safety well. The stainless steel construction ensures it handles wear and tear.
Best For
Homes needing a reliable, mid-range heater with good flow and protection features.
Pros and Cons
Pros:
- Solid flow rate for everyday use
- Comprehensive safety protections
- Durable materials reduce maintenance
- Consistent performance
Cons:
- Similar to model #7, may have Celsius-only display
- BTU could be higher for colder regions
Customer Reviews
Customer Review: “Great unit that works well above my needs (1 bath trailer house) I was sceptical for the price but have been very happy with it after 2 weeks of use, showers stay hot and consistent, handles all washing machine needs, runs 20 minutes continuously with a 1 minute recovery in between. On the longer se…”
Customer Review: “This replaced a much more expensive Ecotemp i12 tankless water heater which was NEVER good. For one thing it whistled at times so loud you could hear it 30 yards away from the house. Also their customer service NEVER responded to questions. This one has only one drawback. It reads in Celsius (Centig…”
10. 2025 GEN II Ranein Propane Gas Tankless Water Heater Max 5.3 GPM, 130,000 BTU Indoor On Demand In…
This 2025 GEN II Ranein propane tankless hot water heater is powerful with 130,000 BTU and 5.3 GPM flow. It supports multiple taps and has advanced temperature stability.
Key Features That Stand Out
- ✓ High-efficiency with 5.3 GPM flow and 130,000 BTU
- ✓ Steady temperature auto-adjustment for comfort
- ✓ Bottom-mounted blower for safe combustion
- ✓ Supports 3–5 taps simultaneously
Why We Recommend It
Its high capacity makes it perfect for large households. The blower design enhances safety and efficiency.
Best For
Large families or homes with high hot water demand.
Pros and Cons
Pros:
- Exceptional flow rate and BTU output
- Excellent for multiple simultaneous uses
- Advanced blower for better combustion
- Stable temperature control
Cons:
- Higher electricity usage for blower
- Installation directions could be improved
Customer Reviews
Customer Review: “We installed the unit very easily and it is functioning perfectly. It does take a few minutes for the water to get hot, but you will never run out of hot water as long as you have propane.The unit shuts off immediately after you turn off the faucet. I’m sure you will save gas and $$$.”
Customer Review: “Directions are not the best but overall simple to install. Perfectly sized. Has some weight on it easily 15-20lbs. Very basic display. Not a lot of buttons to press. Uses more electricity than I’d like for a gas water heater.”
Complete Buying Guide for Best Propane Tankless Hot Water Heater
Essential Factors We Consider
When picking the best propane tankless hot water heater, focus on flow rate (GPM), BTU output, and installation needs. Flow rate tells you how much hot water it can deliver at once. BTU shows heating power. Also, check safety features like freeze protection and venting requirements. Indoor vs. outdoor models matter for placement.
Budget Planning
Prices vary from budget units under $300 to premium models over $1,000. Remember to factor in installation costs if you hire a pro. Look for energy savings over time to offset upfront costs. Sometimes, a mid-range heater offers the best value.
Final Thoughts
Think about your household size and hot water habits. A small home might do well with 3-4 GPM, while large families need 5 GPM or more. Always read reviews and consider brand reputation for reliability.
Frequently Asked Questions
Q: How does a propane tankless hot water heater work?
A: It heats water directly as it flows through the unit, using a propane burner. No storage tank is needed, so you get hot water on demand.
Q: What size propane tankless water heater do I need?
A: Calculate based on the number of fixtures you’ll use at once. For example, a shower uses about 2.5 GPM, so if two showers run simultaneously, you need at least 5 GPM.
Q: Are propane tankless water heaters energy efficient?
A: Yes, they are more efficient than tank heaters because they only heat water when needed. This can save up to 30% on energy bills.
Q: Can I install a propane tankless water heater myself?
A: It’s possible if you have plumbing and gas experience, but we recommend a professional for safety and to ensure proper venting and gas lines.
Q: How long do propane tankless water heaters last?
A: With good maintenance, they can last 20 years or more, much longer than traditional tank heaters.
We’ve covered the top 10 best propane tankless hot water heaters to help you make an informed choice. Whether you need a powerful unit for a large family or a budget option for a small home, there’s a model here for you. Remember to consider flow rate, BTU, and installation details. Ready to upgrade? Click the links above to check prices and enjoy endless hot water today!
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