15-Year Dual Heat Exchanger Warranty
ENERGY STAR® Certified
Ultra High Efficiency – 0.96 UEF
Navien High-Efficiency Tankless Heater Upgrade
Experience the ultimate upgrade for your home. Our expertly selected Navien tankless heater provides endless hot water, significant energy savings, and a compact, space-saving design. It's the #1 selling brand for a reason.
Unlimited Single shower length
Unlimited showers Back-to-back
Up to 3 showers At the same time
What’s Included
Learn more- Delivery & Professional Installation
- Old Unit Removal & Eco-Disposal
- 24-Hour Installation Guarantee
- Workmanship Satisfaction Guarantee
$2,899 All-Inclusive Price
Guaranteed Installation Within 24 hours
After you order, our team will contact you to schedule your 2-hour arrival window.
15-Year Dual Heat Exchanger Warranty
ENERGY STAR® Certified
Ultra High Efficiency – 0.96 UEF
Product Details
At Tanks & Toilets, we do the research so you don't have to. We've expertly selected the Navien NPE-S2 because it is the #1 selling tankless brand, offering the ultimate upgrade in performance and value. Enjoy a continuous, endless supply of hot water with a powerful 10.1 GPM flow rate that easily supports multiple showers at once. Its ultra-high 0.96 UEF efficiency rating dramatically lowers your energy bills, thanks to advanced condensing technology and durable dual stainless steel heat exchangers. All this power comes in a compact, space-saving design that frees up valuable floor space, making it the smartest long-term investment for your home
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Endless Hot Water Supply: Provides a continuous flow of hot water on demand.
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Versatile Installation: Can be installed indoors or outdoors (with outdoor vent cap accessory).
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Durable Construction: Features dual stainless steel heat exchangers for a long service life.
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High-Output Performance: A 10.1 GPM flow rate easily supports multiple simultaneous uses.
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Compact, Space-Saving Design: Wall-mounted unit frees up an entire closet's worth of floor space.
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Comprehensive Warranty: Includes a 15-year heat exchanger, 5-year parts, and 1-year labor warranty.
- Brand: Navien
- Model: NPE-210S2
- Color: White
- Material: Metal
Performance
Unlimited
Single shower length
Unlimited showers
Back-to-back
Up to 3 showers
At the same time
Unlimited
Max tub fill size
$193 / year
Estimated energy cost
Features
Ultra-Efficient Performance
Condensing tech recycles heat for maximum energy savings
Endless Hot Water
Enjoy an endless supply for multiple showers and appliances at once.
Built for a 20+ Year Lifespan
Dual stainless steel heat exchangers resist corrosion and are built to last.
Compact, Space-Saving Design
Mounts neatly on a wall—frees up floors for storage or access
Dimensions & Weight
Technical Specifications
Inside the Navien Design
1
PVC Venting Allows for versatile installation using standard PVC pipes for runs up to 75 feet. A Vent Detector ensures safety.
2
Dual Venturi System Provides precise air/fuel control for better efficiency and easy field conversion between NG & LP gas.
3
Dual Stainless Steel Heat Exchangers Maximize efficiency and resist corrosion for a longer lifespan, even with hard water.
EZNav™ Control Panel Backlit display with simple text makes setup, status checks, and troubleshooting easier than ever before.
4
Integrated Buffer Tank Part of ComfortFlow®, this small tank eliminates the unpleasant "cold water sandwich" for consistent comfort
5
ComfortFlow® Recirculation Built-in pump & buffer tank deliver hot water faster and eliminate cold bursts for ultimate convenience.
6
Field Convertible Gas System Easily converts between Natural Gas and Propane using the included kit for maximum installation flexibility.
7
½" Gas Line Capable Saves time and money on installation by using existing ½" gas lines up to 24 feet in many retrofit situations.
8
Wall-Mount Design Compact unit saves valuable floor space. Installs indoors or outdoors & allows easy access for future service.
Warranty Information
White-Glove Delivery
Your new tankless water heater is delivered fast and handled with care. Our team coordinates delivery and scheduling so your replacement arrives exactly when you need it—stress-free.
Professional Installation
Our vetted plumbing expert installs your new tankless water heater to the highest standards, using top-quality parts. We test everything to ensure it works flawlessly before we leave.
Old Tank Haul-Away
Our service isn't complete until the old unit is gone. We safely disconnect, drain, and remove your old water heater for responsible, eco-friendly disposal.
Installed in 24 Hours — Guaranteed
If we miss our 24-hour installation promise, we’ll refund your payment and give you $500 for the inconvenience.
Tankless vs. Tank: At a Glance
Use our simple chart to compare the key differences and find the best fit for your home.
| Hot Water Supply | Endless & On-Demand | Finite (Limited by the 50-gallon tank capacity) |
| Simultaneous Use | Up to 3 or more (depends on flow) | Up to 3 showers |
| Single Shower Length | Unlimited | ~34.7 minutes |
| Back-to-Back Showers | Unlimited | Up to 4 showers |
| Max Tub Fill Size | Unlimited | ~81 gal (gas) / ~69 gal (electric) |
| Space Required | Minimal (Compact, wall-mounted unit) | Large (Requires 9-12 sq. ft. of floor space) |
| Energy Efficiency | Ultra-High (Heats water only when needed) | Standard (Some energy is lost keeping stored water hot) |
| Est. Energy Cost | Lowest (~$193 / year) | Low (~$237 / year gas / ~$432 / year elec.) |
| Compatibility | Requires gas line (natural or propane) | Available in both gas and electric |
| Lifespan | 20+ Years | 8-12 Years |
| Warranty | 15-year limited warranty | 8-year limited warranty |
| Bottom Line... |
Endless hot water
Maximum performance
Advanced efficiency
Longer life
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Reliable
Familiar design
Lower cost to replace
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* As based on the average operating costs, efficiency and lifespans of tankless vs. storage water heaters per the Department of Energy (energy.gov).
Replace or Repair? See the Difference
Compare the long-term value, efficiency, and peace of mind of replacement vs. repair.
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Replacement
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Repair
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|---|---|---|
| Long-Term Cost | One-time investment | Frequent repairs add up |
| Efficiency | New unit = peak efficiency | Older units waste energy |
| Reliability | Consistent performance | Unpredictable failures |
| Warranty | Manufacturer warranty | No warranty |
| Convenience | Installed in 24 hours | Delays and repeat visits |
Don't Just Take Our Word For It
We're proud to offer a simpler, faster way to replace toilets and water heaters in Arizona & Oklahoma. Here's the feedback.
Fast
My water heater failed, and I needed it fixed now. I ordered at 10 PM on a Tuesday, and Marco was at my house Wednesday afternoon. Tanks and Toilets saved the day for us!
Russell F. Verified Buyer
Sep 17, 2025Thanks
Great service, fast replacement of my water tank. Highly recommend. Marco was awesome and explained everything as he completed the work. Completely happy with the decision to use this company. Thank you so much
Tanner W. Verified Buyer
Sep 19, 2025Great
I'll admit, I was skeptical about buying a tankless water heater online but I took a chance, and it paid off. Roberto, our installer, was a true pro. The process was seamless! 10/10 would recommend!
Megan M. Verified Buyer
Sep 22, 2025Very Pleased
Fast. Clean. Professional. Thomas showed up on time, replaced our old water heater, and hauled the old it away. Exactly what was promised. 10/10.
Mona F. Verified Buyer
Sep 30, 2025I Have Hot Water
Woke up to no hot water. I was dreading having to call plumbers for bids. Found Tanks & Toilets online, ordered at 8 AM, and Roberto had our new tank installed by 3 PM the same day. Unbelievable service!
Brooke B. Verified Buyer
Oct 01, 2025Highly recommend
We woke up on a Sunday morning to a garage full of water from our old water heater. I searched online for a replacement and found tanks and toilets. I purchased it online with an all inclusive price. They were at my house just a few hours later on a Sunday. They did a great job. They also hauled away our old unit. We highly recommend them. Thanks
Chelsea T. Verified Buyer
Oct 24, 2025Good Deal
I called on 5 companies. 3 returned my call and came for an estimate. None of them followed up after the estimate. I found Tanks and Toilets and decided to purchase online instead because of the $500 on time guarantee. Install was timely and efficient and they cleaned up after themselves. I am very pleased with our hot water system.
Ryan H. Verified Buyer
Oct 30, 2025Very Clean and Professional
Thomas was our installer and he was just fantastic. He arrived in a clean uniform, put on shoe covers immediately, and was so respectful of our home. He protected our floors and left the area cleaner than he found it. That level of professionalism is rare.
Dallas T. Verified Buyer
Nov 01, 2025Highly recommend
Incredibly simple process. ..our old toilet broke, I ordered a new one on their website in about five minutes, and Marco had it installed the next morning. The 24 hour guarantee is for real, Highly recommend!
Kristen H. Verified Buyer
Nov 03, 2025How It Works in 3 Easy Steps
Our simple online process gets you a new toilet or water heater in 24 hours. See how!
Choose Your Product
We offer one expertly chosen toilet, tank, or tankless heater to make your decision simple.
Checkout with Upfront Pricing
Transparent, all-inclusive pricing—no quotes, no hidden fees, no surprises.
We Handle the Rest
Our plumbing professionals install within 24 hours and haul away the old unit.
Frequently Asked Questions
How does a tankless water heater work?
Instead of storing hot water in a large tank, a tankless heater works on-demand. When you turn on a hot water faucet, cold water flows into the unit. A powerful burner ignites and instantly heats the water as it passes through a heat exchanger before traveling directly to your tap. This provides an endless supply of hot water and only uses significant energy when you actually need it.
Is this tankless unit powerful enough for my home?
Yes, absolutely. The Navien NPE-S2 model we install is a high-performance unit specifically chosen for its ability to meet the demands of a typical family home in Oklahoma or Arizona.
It delivers an impressive 10.1 Gallons Per Minute (GPM) flow rate. In practical terms, this means it can easily power multiple showers and faucets running simultaneously without running out of hot water. It's more than powerful enough for busy households.
What's involved in the installation when switching from a tank?
Upgrading from a tank to our Navien tankless heater is a professional job that involves a few key steps. Our experts typically install new, dedicated PVC venting for the high-efficiency system, upgrade the gas line to provide the necessary power, and adjust the plumbing connections. Don't worry – all of these necessary modifications are handled by our team and included in your single, all-inclusive price.
What maintenance does this specific Navien model require?
To ensure peak efficiency and its long 20+ year lifespan, this Navien unit requires simple annual maintenance. The most important step is flushing (or "descaling") the heat exchangers to remove mineral buildup. Cleaning the inlet filters is also recommended. Performing this quick service keeps your unit running like new.
Does this tankless model work with propane or natural gas?
Yes. The Navien NPE-210S2 includes a field-conversion kit, so it can easily run on either natural gas or propane, depending on your home’s setup.
How long will a Navien tankless water heater last?
With proper maintenance, Navien tankless systems often last 20 years or more—about twice the lifespan of a traditional tank water heater.
How much can I realistically expect to save on my energy bills?
You can expect significant savings. This Navien unit boasts an ultra-high 0.96 UEF efficiency rating, meaning almost no energy is wasted. By eliminating the "standby heat loss" of a traditional tank, many homeowners see their water heating costs decrease by 25% or more annually. While exact savings vary based on your usage and local fuel costs, it's a smart investment that pays you back over time.
Your Problem, Solved Fast
Proudly serving the greater Phoenix/Scottsdale and Oklahoma City areas—your trusted source for fast, hassle-free toilet and water heater replacements.
