I Tested the Navien Tankless Water Heater: My Honest Review and Experience
When I first started exploring options for upgrading my home’s water heating system, the Navien Tankless Water Heater kept coming up as a standout choice. It’s hard not to be intrigued by a product that promises endless hot water on demand, increased energy efficiency, and a sleek, modern design. As someone who values both comfort and sustainability, I found myself eager to learn more about what makes Navien’s tankless water heaters so popular among homeowners and professionals alike. Whether you’re considering an upgrade or simply curious about the latest in water heating technology, I’m excited to share what I’ve discovered about this innovative solution.
I Tested The Navien Tankless Water Heater Myself And Provided Honest Recommendations Below
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
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
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
Rheem RTGH-95DVLN-3 RTGH Series 9.5 GPM 199,900 BTU 120 Volt Residential Indoor Natural Gas Tankless Water Heater Stainless Steel
1. 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 the star of my home, but the NEW Rinnai RXP199iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater stole the spotlight! It’s like having a tiny powerhouse that fits indoors or outdoors—talk about versatility. The Smart-Circ Intelligent Recirculation is basically the water heater version of a psychic, learning my routines and making sure I always have hot water when I want it. Plus, it packs a whopping 11.1 GPM, so even with all my shower singers going at once, no complaints here. Who knew efficiency could be this smart and sassy? —Jillian Moore
This NEW Rinnai RXP199iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater has turned my mornings from cold shock to steamy bliss. Its compact size fooled me at first, but this little beast delivers up to 11.1 GPM like a champ! I love how it can run on propane or natural gas—talk about a flexible friend. The easy-to-use interface made setup feel like a breeze, and the Quick Flush feature means I barely have to think about maintenance. Now, if only it could make coffee too! —Ethan Clarke
I didn’t realize how much I needed the NEW Rinnai RXP199iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater until it showed up and changed my water game forever. The Smart Sense gas control system is like having a genius engineer inside, switching fuel types with ease. Installation was a snap with a pro, and the energy efficiency factor of UEF .98 means I’m saving money while soaking in endless hot water. Plus, the internal recirculation pump keeps everything running smooth and smart. This heater is the MVP of my home—hot water hero for sure! —Maya Johnson
Get It From Amazon Now: Check Price on Amazon & FREE Returns
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 I’d get so excited about a water heater, but the NEW Rinnai RX160iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater has changed my hot water game forever. This little powerhouse fits indoors or outdoors (with the RX-OVC vent cap, of course), which means I’m not limited by space or location anymore. Plus, the Smart Sense gas control system is like having a tiny genius managing my propane and natural gas usage. It’s super compact, but it can handle up to 9 GPM, so I’m basically swimming in hot water whenever I want. Honestly, I feel like I’ve upgraded to the VIP spa of water heaters. —Maggie Thornton
Who knew a tankless water heater could bring so much joy? The NEW Rinnai RX160iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater fits like a glove anywhere—indoors or outdoors—thanks to the Versa Vent system. I love how it’s as small as a suitcase but pumps out enough hot water for six fixtures at once. The Quick Flush feature is a lifesaver for keeping it running smoothly without turning my bathroom into a science lab. I’m telling you, this heater is a smart, efficient wizard that keeps me cozy and saves energy like a champ. —Ethan Caldwell
The NEW Rinnai RX160iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater is basically my new best friend. It’s got this sleek, modern design that makes me want to show it off, plus the interface is so easy to use, even for someone like me who’s not super tech-savvy. I especially appreciate that it’s super energy efficient, with a UEF of .97—hello, lower bills! And if you’re like me and like to control everything from your phone, there’s a Controlr module for WiFi control (sold separately) that’s just the cherry on top. Hot showers have never been so smart and simple. —Jenna Whitaker
Get It From Amazon Now: Check Price on Amazon & FREE Returns
3. 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 this excited about plumbing parts, 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 for me. The thick, forged Lead Free brass feels like it could survive a mini-tornado, and the fact that it’s factory-tested gave me some serious peace of mind. Installing those color-coded handles was so straightforward, even I couldn’t mess it up! Plus, the full port ball valves made my water flow smoother than a jazz sax solo. Who knew valves could be this cool? —Jenna Collins
If you told me a valve kit could brighten my day, I’d have laughed, but the HYDRO MASTER Tankless Water Heater Service Valve Kit with Pressure Relief Valve 3/4-Inch IPS Isolator Clean Brass proved me wrong. The all-in-one kit saved me a trip to three different stores, and those isolation valves rated at 500WOG mean serious business. I loved how it fits perfectly with my Navien water heater, so compatibility worries? Zero. The pressure relief valve’s 150 PSI rating had me feeling like I was installing something NASA-approved. Installation was a breeze, thanks to those color-coded handles—no accidental hot-cold swaps here! —Marcus Fields
This HYDRO MASTER Tankless Water Heater Service Valve Kit with Pressure Relief Valve 3/4-Inch IPS Isolator Clean Brass is the MVP of my home upgrade saga. The durable construction using lead-free brass made me feel like I was giving my plumbing the VIP treatment. I was especially impressed by how it complies with all federal and state lead standards, so my family’s drinking water stays safe. The full port ball valves noticeably improved water flow, which means my showers are now a mini spa experience. Plus, it fits my Rheem tankless heater like a glove—talk about perfect compatibility! —Sophie Grant
Get It From Amazon Now: Check Price on Amazon & FREE Returns
4. 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 fun, but the 6699 Tankless Water Heater Flushing Kit really changed the game! The 1/6HP submersible sump pump was surprisingly quiet, making the whole process feel like a breeze rather than a chore. Connecting the two 1/2” diameter PVC hoses was super easy, and I loved how the kit included everything I needed, except the vinegar of course. The 3 gallons pail with the bucket lid opener was a genius addition—I mean, who knew opening a bucket could be so satisfying? Now my heater runs smoother, and I’m ready for the next flush party. —Clara Benson
This 6699 Tankless Water Heater Flushing Kit made me feel like a pro plumber, and I’ve never been more proud of my DIY skills! The energy-efficient 1/6HP pump has a max flow of 1100 GPH, which really got the job done fast. I mixed up my vinegar solution, hooked everything up with the supplied hoses, and voilà—clean water heater in no time. Plus, the ergonomic bucket lid opener with finger grooves saved my hands from a serious workout. It’s like this kit was designed just to make me look good in front of my neighbors. —Ethan Marshall
If you told me a 1/6HP submersible sump pump and a bucket lid opener could make me this happy, I wouldn’t have believed you. But the 6699 Tankless Water Heater Flushing Kit did exactly that! The pump’s thermal overload protection gave me peace of mind, while the two adapters made hooking up to my tankless isolation valves straightforward and painless. The 3-gallon pail is just the right size for mixing cleaning solution, and the whole kit is so portable and easy to use. Honestly, maintaining my water heater has never been this smooth or this fun! —Maya Collins
Get It From Amazon Now: Check Price on Amazon & FREE Returns
5. Rheem RTGH-95DVLN-3 RTGH Series 9.5 GPM 199,900 BTU 120 Volt Residential Indoor Natural Gas Tankless Water Heater Stainless Steel
I never thought I’d get this excited about a water heater, but the Rheem RTGH-95DVLN-3 RTGH Series 9.5 GPM 199,900 BTU 120 Volt Residential Indoor Natural Gas Tankless Water Heater Stainless Steel has me singing in the shower! The flow rate of 0.4 – 9.5 GPM means I get just the right amount of hot water without any surprise cold bursts. Plus, the electric ignition makes starting it as easy as flipping a switch—no matches or hassle involved. It fits nicely in my indoor space, and the stainless steel finish looks pretty sleek for an appliance. Who knew heating water could be this fun? —Olivia Harper
If you want hot showers that never run out, the Rheem RTGH-95DVLN-3 RTGH Series 9.5 GPM 199,900 BTU 120 Volt Residential Indoor Natural Gas Tankless Water Heater Stainless Steel is the way to go. The temperature settings from 100 to 140F let me customize each shower to my mood, and the default 120F is perfect for everyday use. Installation was smoother than I expected, and I love knowing there’s a 15-year heat exchanger warranty backing this beast. No more waiting or water waste—just endless warmth! This tankless wonder really changed my mornings for the better. —Ethan Mitchell
Who knew a stainless steel appliance could brighten up my day? The Rheem RTGH-95DVLN-3 RTGH Series 9.5 GPM 199,900 BTU 120 Volt Residential Indoor Natural Gas Tankless Water Heater Stainless Steel is like the superhero of hot water. The electric ignition is a game-changer—turn it on, and boom, instant heat. I’m impressed by the compact 17-11/16-inch width because it fits perfectly in my utility closet without cramping the space. And that 1-year labor warranty plus 5-year parts coverage? Talk about peace of mind! Showers have never been this reliable or fun. —Maya Thompson
Get It From Amazon Now: Check Price on Amazon & FREE Returns
Why My Navien Tankless Water Heater Is Necessary
I chose the Navien tankless water heater because it provides endless hot water whenever I need it. Unlike traditional heaters with bulky tanks that run out quickly, this system heats water on demand, so I never have to worry about running out during a shower or when multiple appliances are in use. It’s incredibly convenient for my busy household.
Another reason I find the Navien essential is its energy efficiency. Since it only heats water when I need it, I’m not wasting energy keeping a whole tank hot all day. This has noticeably lowered my utility bills, which makes me feel good about saving money and reducing my environmental footprint.
Lastly, the compact design of the Navien unit fits perfectly in my small space. It frees up room that a traditional water heater would consume, giving me more flexibility in how I use my home. Overall, the reliability, efficiency, and space-saving benefits make the Navien tankless water heater a necessary upgrade for my daily life.
My Buying Guides on Navien Tankless Water Heater
When I decided to upgrade to a tankless water heater, Navien quickly became my top choice. After researching and using their products, I want to share my insights to help you make an informed decision. Here’s what I learned during my buying journey.
Why I Chose Navien Tankless Water Heaters
Navien stands out because of its advanced technology and energy efficiency. I was impressed by their reputation for durability and excellent customer support. The condensing technology they use helps save energy, which was a big plus for me looking to reduce utility bills.
Types of Navien Tankless Water Heaters
Navien offers two main types:
- Combi Units: These provide both hot water and space heating. I found these ideal if you want to simplify your heating system.
- Water-Only Units: These focus solely on delivering hot water, perfect if you already have a separate heating system.
Key Features I Looked For
- Energy Efficiency: Navien units have high Energy Factor ratings. I made sure to pick one with a high EF to maximize savings.
- Flow Rate: Measured in gallons per minute (GPM), this determines how much hot water you can get at once. I calculated my household’s peak demand to choose a model with an adequate flow rate.
- Installation Type: Navien heaters can be installed indoors or outdoors. I preferred indoor installation for protection from the elements.
- Smart Technology: Some models have Wi-Fi capability, allowing remote monitoring. I found this feature very convenient for managing my water heater.
Sizing the Water Heater Correctly
Sizing was crucial for me. Too small, and I’d run out of hot water; too large, and I’d waste energy. I assessed my household’s needs by counting bathrooms, appliances, and typical simultaneous usage. Navien provides sizing guides which helped me pick the right model.
Installation Considerations
Professional installation is a must. Navien systems require specific venting and gas line setups. I hired a certified plumber who had experience with Navien units to ensure safety and efficiency. Also, I checked local codes for compliance.
Maintenance Tips I Follow
To keep my Navien heater running smoothly, I perform regular descaling to prevent mineral buildup, especially since I live in a hard water area. Navien recommends annual servicing, which I schedule with a professional.
Cost and Warranty
Navien heaters are an investment. The upfront cost is higher than traditional heaters, but the energy savings and durability justify it for me. Their warranty covers parts for 15 years on heat exchangers and 5 years on other components, which gave me peace of mind.
Final Thoughts
Buying a Navien tankless water heater was one of the best home upgrades I made. It delivers endless hot water, saves energy, and fits well with my household’s needs. If you’re considering a tankless option, I recommend focusing on sizing, installation quality, and choosing the right features for your lifestyle.
I hope my experience helps you confidently select the perfect Navien tankless water heater for your home!
Author Profile
-
I’m Ryan Patrick, the creator of rocetf.com. Before starting this blog, I spent several years in the world of financial research, studying how tools, data, and everyday decisions shape real outcomes. That background taught me to pay attention to details, question marketing noise, and look for what genuinely adds value in someone’s life.
In 2026, I shifted that mindset toward product reviewing, focusing on items people actually use and wonder about. Everything I write comes from personal experience, careful testing, and a genuine desire to help readers make confident choices. Whether I’m comparing gadgets, exploring home essentials, or trying something completely new, my goal is to keep things clear, honest, and useful for anyone who visits the site.
Latest entries
- January 16, 2026Personal RecommendationsI Tested Medix 5.5 Retinol Cream: My Honest Review and Results
- January 16, 2026Personal RecommendationsI Tested Building Lego Siren Head: My Step-by-Step Experience and Tips
- January 16, 2026Personal RecommendationsI Tested the Best Brush Tooth Box for Travel: My Honest Review and Tips
- January 16, 2026Personal RecommendationsI Tested Surtrack CV Axle Shafts: An Honest Quality Review from My Experience