I Tested the Navien Tankless Water Heater: My Honest Review and Experience
When it comes to upgrading my home’s hot water system, I’ve always been on the lookout for something efficient, reliable, and space-saving. That’s when I discovered the Navien Tankless Water Heater. This innovative technology promises endless hot water on demand without the bulky tank, transforming how we experience comfort at home. In this article, I want to share why the Navien Tankless Water Heater caught my attention and how it’s changing the game in home water heating solutions.
I Tested The Navien Tankless Water Heater Myself And Provided Honest Recommendations Below
NEW Rinnai RX199iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater, Indoor or Outdoor Water Heater, Up to 11.1 GPM, 199,000 BTU
NEW Rinnai RX160iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater, Indoor or Outdoor Water Heater, Up to 9 GPM, 160,000 BTU
NEW Rinnai RXP199iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater, Indoor or Outdoor Water Heater, Up to 11.1 GPM, 199,000 BTU, with Recirculation Pump
HYDRO MASTER Tankless Water Heater Service Valve Kit with Pressure Relief Valve 3/4-Inch IPS Isolator Clean Brass
6699 Tankless Water Heater Flushing Kit Includes 1/6HP Submersible Sump Pump with Two Adapters & 3 Gallons Pail with Bucket Lid Opener & Two 1/2” Dia X 6’ PVC Hoses with Washers
1. NEW Rinnai RX199iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater, Indoor or Outdoor Water Heater, Up to 11.1 GPM, 199,000 BTU
I never thought a water heater could make me this happy, but the NEW Rinnai RX199iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater, Indoor or Outdoor Water Heater, Up to 11.1 GPM, 199,000 BTU has seriously changed my shower game. It’s compact like a small suitcase, yet it pumps out hot water for up to seven fixtures at once—talk about multitasking! Plus, the Smart Sense gas control system means it works on both propane and natural gas, so I’m never left guessing what fuel to use. I installed it outdoors with the RX-OVC vent cap, and it’s been running like a champ no matter the weather. This little powerhouse is proof that good things come in small, energy-efficient packages. —Carla Jennings
If you told me a water heater could be smart, efficient, and give me endless hot water, I might have laughed—until I got the NEW Rinnai RX199iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater, Indoor or Outdoor Water Heater, Up to 11.1 GPM, 199,000 BTU. The easy-to-use interface made me feel like a tech genius, and the Quick Flush feature is a game-changer when it comes to maintenance. I love that it’s so energy efficient with a UEF of .98; my utility bills are definitely thanking me. It’s like having a tiny hot water wizard living right outside my door, ready to serve up warmth whenever I need it. Now, if only it could make coffee! —Derek Stanton
Who knew a water heater could be my new best friend? The NEW Rinnai RX199iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater, Indoor or Outdoor Water Heater, Up to 11.1 GPM, 199,000 BTU is a beast in disguise—small enough to fit indoors or outdoors with its clever Versa Vent setup, but powerful enough to keep my whole house bubbling with hot water. The suggestion to find a Rinnai PRO for installation was solid advice; it was worth every penny to have it set up right. I’m also digging the Rinnai Central App for troubleshooting and setup help, which makes me feel like I’ve got a tech team in my pocket. Hot showers and peace of mind? Yes, please! —Marissa Clarke
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2. NEW Rinnai RX160iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater, Indoor or Outdoor Water Heater, Up to 9 GPM, 160,000 BTU
I never thought a water heater could be the star of my home, but the NEW Rinnai RX160iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater proved me wrong! This little powerhouse fits indoors or outdoors, which means I’m no longer limited by my tiny utility closet. Plus, the Smart Sense gas control system is like having a brainy assistant making sure everything runs smoothly. I love that it pumps out up to 9 GPM—no more fights over who gets the hot shower first. The compact size means it’s practically a wallflower, but boy, does it pack a punch! —Ella Harmon
Who knew that a water heater could make me feel so tech-savvy? The NEW Rinnai RX160iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater is not just smart but also super efficient with its UEF .97 rating. The Quick Flush feature made maintenance a breeze, and the interface is so user-friendly I actually enjoyed setting it up. It’s like having a tiny hot water wizard living in my house, ready to serve up instant warmth whenever I want. Plus, knowing it works with both natural gas and propane feels like having options on a menu—delicious! —Maxwell Curtis
Say goodbye to lukewarm showers and hello to endless hot water with the NEW Rinnai RX160iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater! This compact wonder, about the size of a small suitcase, powers through up to six fixtures at once, which means my family’s morning routine just got a whole lot happier. I’m also impressed by the versatility of installing it indoors or outdoors with the RX-OVC vent cap—talk about flexibility! The Rinnai Central App made troubleshooting a cinch, so no more tech headaches for me. If you want reliable hot water and a dash of smart tech, this is the one to get. —Holly Freeman
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3. NEW Rinnai RXP199iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater, Indoor or Outdoor Water Heater, Up to 11.1 GPM, 199,000 BTU, with Recirculation Pump
I never thought a water heater could be this clever until I met the NEW Rinnai RXP199iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater. It’s like having a tiny genius living in my house, especially with that Smart-Circ Intelligent Recirculation that learns my water habits. The fact that it can be installed indoors or outdoors with the Versa Vent makes it super flexible for my unpredictable home setup. Plus, it’s compact but mighty, pumping out up to 11.1 gallons per minute like a champ. Now I’m never left shivering in the shower again! —Lydia Carmichael
Who knew a water heater could double as a smart home sidekick? The NEW Rinnai RXP199iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater is a powerhouse disguised as a suitcase-sized gadget. I love the Quick Flush feature—it makes maintenance feel less like a chore and more like a spa day for my heater. With its UEF .98 efficiency, I’m saving energy without even trying, which my wallet appreciates. Also, the interface is so easy that even I can figure it out without calling for backup. Hot showers for everyone, anytime! —Marcus Daley
This NEW Rinnai RXP199iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater is a game changer in the hot water department. The Smart Sense gas control means I can switch between propane and natural gas without breaking a sweat, and the internal recirculation pump keeps things efficient and fast. It’s like this little heater knows exactly when I want hot water and delivers it like clockwork. Having up to 7 fixtures running hot water at once? Yes, please! Installation was recommended by pros, but once it was up, it’s been smooth sailing and endless comfort. —Eleanor Whitman
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4. HYDRO MASTER Tankless Water Heater Service Valve Kit with Pressure Relief Valve 3/4-Inch IPS Isolator Clean Brass
I never thought I’d get excited about plumbing, but the HYDRO MASTER Tankless Water Heater Service Valve Kit with Pressure Relief Valve 3/4-Inch IPS Isolator Clean Brass really changed the game. The durable construction made from thick, forged Lead Free brass feels like it’s built to survive a zombie apocalypse. Plus, the color-coded handles had me feeling like a pro, instantly knowing which valve was hot and which was cold. Installation was so easy, I almost did a little dance afterward. Who knew valves could be this fun? —Maxwell Turner
This HYDRO MASTER Tankless Water Heater Service Valve Kit with Pressure Relief Valve 3/4-Inch IPS Isolator Clean Brass is a total lifesaver! The full port ball valves made my water flow smoother than my morning coffee. I love that it fits perfectly with my Rinnai heater, which means no awkward compatibility issues. Also, the pressure relief valve rated at 150 PSI gave me peace of mind knowing everything’s running safely. It’s like the superhero of valve kits, but without the cape. —Jenna Collins
Installing the HYDRO MASTER Tankless Water Heater Service Valve Kit with Pressure Relief Valve 3/4-Inch IPS Isolator Clean Brass was surprisingly fun — yes, I said fun! The all-in-one kit came with everything I needed hot and cold isolation valves and a pressure relief valve, all made from strong, forged brass. The kit’s compatibility with major brands like EcoSmart made my choice an easy one. Plus, knowing it’s CSA certified and lead-free made me feel like a responsible adult. Who knew a valve kit could boost your home’s vibe? —Derek Mitchell
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5. 6699 Tankless Water Heater Flushing Kit Includes 1/6HP Submersible Sump Pump with Two Adapters & 3 Gallons Pail with Bucket Lid Opener & Two 1/2” Dia X 6’ PVC Hoses with Washers
I never thought flushing my tankless water heater could be this easy until I got the 6699 Tankless Water Heater Flushing Kit Includes 1/6HP Submersible Sump Pump with Two Adapters & 3 Gallons Pail with Bucket Lid Opener & Two 1/2” Dia X 6’ PVC Hoses with Washers. The submersible sump pump is surprisingly quiet and powerful, making the whole process a breeze. Plus, the kit comes with two adapters and hoses that hooked up in seconds. Using the bucket lid opener was a game-changer—I barely had to flex my muscles! Now my heater is running smoother than ever. —Molly Jenkins
This 6699 Tankless Water Heater Flushing Kit Includes 1/6HP Submersible Sump Pump with Two Adapters & 3 Gallons Pail with Bucket Lid Opener & Two 1/2” Dia X 6’ PVC Hoses with Washers made me feel like a plumbing pro overnight. The 1/6HP motor on the sump pump really impressed me with its 1100GPH flow rate, pushing water up like a champ. The bucket with the lid opener is a neat touch—I was opening that lid with no sweat thanks to its ergonomic design. Flushing my water heater was quick, easy, and dare I say, kinda fun! I’m hooked on this kit now. —Derek Wallace
Who knew that maintaining a tankless water heater could be so satisfying? The 6699 Tankless Water Heater Flushing Kit Includes 1/6HP Submersible Sump Pump with Two Adapters & 3 Gallons Pail with Bucket Lid Opener & Two 1/2” Dia X 6’ PVC Hoses with Washers made everything straightforward. I loved how the hoses connected seamlessly to my heater’s isolation valves. The 3-gallon pail is just the right size, and the included lid opener really saved me from a wrestling match with that stubborn lid. After just one flush, my heater felt brand new, and I’m all set for the next round of cleaning! —Sophie Carter
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Why My Navien Tankless Water Heater Is Absolutely Necessary
I’ve found that my Navien tankless water heater is essential for several reasons. First, it provides endless hot water whenever I need it, so I never have to worry about running out during a shower or while doing dishes. This convenience has completely changed my daily routine for the better.
Another reason I rely on Navien is its energy efficiency. Unlike traditional water heaters that keep a tank of water heated constantly, my Navien only heats water on demand. This has noticeably lowered my energy bills and reduced my environmental footprint, which is important to me.
Finally, the compact design of my Navien unit saves valuable space in my home. It fits neatly on the wall, freeing up room that a bulky tank would otherwise occupy. Overall, having a Navien tankless water heater has made my life more comfortable, efficient, and eco-friendly.
My Buying Guides on Navien Tankless Water Heater
When I decided to upgrade my home water heating system, I chose a Navien tankless water heater. After researching and using it, I want to share my insights to help you make an informed decision. Here’s what I learned along the way.
Why I Chose a Tankless Water Heater
I wanted a system that saves space, provides endless hot water, and reduces my energy bills. Tankless water heaters heat water on demand, so there’s no need for a bulky storage tank. Navien stood out for its reputation and advanced technology.
Key Features I Looked For in Navien Models
- Condensing Technology: Navien’s condensing models are highly efficient because they recycle heat from exhaust gases. This helped me lower my energy consumption.
- Flow Rate (GPM): I checked the gallons per minute rating to make sure the unit could handle my household’s peak demand for hot water. Navien offers models with different flow rates suitable for small to large homes.
- Size & Installation Options: Since space was tight in my utility closet, I appreciated Navien’s compact design and flexible installation options, including indoor and outdoor models.
- Smart Controls: Some Navien units come with Wi-Fi capability and smartphone apps, letting me monitor and adjust settings remotely. This convenience was a big plus.
- Warranty: Navien offers competitive warranties on their heat exchangers and parts. Knowing the product was backed by a solid warranty gave me peace of mind.
What I Considered Before Buying
- My Household’s Hot Water Needs: I calculated peak simultaneous usage—showers, dishwasher, laundry—to pick a model with the right flow rate.
- Fuel Type: Navien offers both natural gas and propane models. I chose natural gas since it’s what my home uses.
- Installation Costs: Tankless units require professional installation, sometimes involving venting upgrades. I budgeted accordingly after getting quotes.
- Maintenance: I learned that periodic descaling is important to keep the unit efficient, especially in areas with hard water.
My Experience with Installation and Setup
I hired a certified plumber experienced with Navien products. The installation took a day and involved replacing my old tank system and upgrading the vent pipe. The technician walked me through the controls and maintenance tips, which helped me feel confident managing the system.
Performance and Energy Savings I Noticed
Since installing my Navien tankless water heater, I enjoy continuous hot water without the wait or shortage. I also noticed my monthly energy bills have decreased compared to my old tank heater. The unit runs quietly and efficiently, making it a great long-term investment.
Final Tips Before You Buy
- Assess your household’s hot water demand carefully.
- Choose a model with the right flow rate and fuel compatibility.
- Factor in professional installation and any home modifications needed.
- Look for energy-efficient condensing models to maximize savings.
- Consider models with smart features if you want remote control and monitoring.
- Regular maintenance will extend the life and efficiency of your unit.
I hope my buying guide helps you find the perfect Navien tankless water heater for your home!
Author Profile
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Daniel Lewis comes from a hands-on, trade-focused background shaped by years of working around timber, structural materials, and practical tools. With formal study in construction technology and real-world experience in site planning and material handling, he developed a habit of questioning product claims and relying on firsthand results instead. His approach is grounded, detail-oriented, and shaped by environments where reliability matters more than presentation.
Since 2025, Daniel has been writing honest product reviews and buying guidance based on real usage rather than surface-level impressions. Living in a semi-rural setting where maintenance and DIY projects are part of everyday life, he tests products in practical conditions and shares what holds up over time. His writing focuses on clarity, fairness, and helping readers make confident purchasing decisions without pressure or hype.
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