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Navien NPE-240A2 . Comfort Flow (Advanced Series) recirculation pump and Buffer Tank Built in. Max Capacity: 199,000 BTU | 11.2 GPM (Max)
Original price was: $3,195.00.$2,998.00Current price is: $2,998.00.
✅ Equipment only →Just add to cart.
The Navien NPE-240A2 is Navien’s most powerful and best-selling condensing tankless water heater, perfect for large households that need maximum hot water capacity. With 199,000 BTU, up to 11.2 GPM, and Navien’s patented ComfortFlow® built-in recirculation, this unit delivers continuous hot water even when multiple fixtures run at the same time.
Engineered for Canadian homes and cold-climate performance, the NPE-240A2 offers super high efficiency (0.95 UEF), advanced stainless-steel heat exchangers, and long-term durability. Whether you’re replacing a traditional tank or upgrading an older tankless system, the NPE-240A2 provides unmatched reliability and energy savings.
Installed professionally by 4Most Energy’s certified Navien technicians, this unit includes full venting, gas line sizing, commissioning, and a 1-year labour warranty (extendable to 10 years).
Navien’s patented ComfortFlow® system is the first to include a buffer tank, recirculation pump, and fine-tuned controls in a tankless water heater. This resolves the cold-water sandwich effect* and issues of minimal flow rates commonly found in other tankless water heaters.
No hidden fees. Just accurate math based on your home’s specs.
Don't Just Buy a Box, Invest in a Solution. The Navien NPE-240A2 is an advanced piece of engineering, but its performance depends entirely on the quality of the installation. Homeowners across Ontario trust 4Most Energy because we specialize in high-efficiency systems.
Factory-Trained Optimization: The NPE-240A2 features advanced ComfortFlow® technology that requires precise programming. Our technicians are factory-trained to configure the recirculation modes correctly, ensuring you actually get the "instant hot water" you paid for.
Maximum Rebate Eligibility: This unit boasts a 0.96 UEF rating, making it eligible for significant energy rebates. We handle the selection and documentation process to ensure you claim every dollar available to you.
Correct Sizing Guarantee: A "powerful" unit is useless if the gas lines or venting aren't up to code. We perform a full load calculation before installation to confirm the 180,000 BTU capacity is perfectly matched to your home's gas supply and water demand.
Protection for Your Investment: While Navien's heat exchangers are durable stainless steel, we further protect their longevity with professional descaling and maintenance plans, ensuring your warranty remains valid for the full 15 years.
| Specification | Value |
|---|---|
| Model | Navien NPE-240A2 |
| Type | Condensing Tankless Water Heater |
| Fuel | Natural Gas |
| BTU Input | 199,000 |
| Max Flow Rate | 11.2 GPM |
| UEF Efficiency | 0.95 (Super High Efficiency) |
| Venting | 2" or 3" PVC, CPVC, SS |
| Installation | Indoor wall-mounted |
| Recirculation | Built-in ComfortFlow® pump |
| Warranty | 15-year HX / 5-year parts / 4Most labour |
Short Product Description: The Navien NPE-240A2 (Premium Series) is the powerhouse of the Navien lineup, designed for large Ontario homes that refuse to compromise. With a massive 199,900 BTU capacity and a max flow rate of 11.2 GPM, it effortlessly powers multiple high-flow showers, soaker tubs, and appliances simultaneously. Featuring Navien's exclusive ComfortFlow® technology (built-in buffer tank and recirculation pump), the NPE-240A2 delivers instant, endless hot water with zero pressure drops—even in the dead of winter.
The NPE-240A2 is the "Ultimate Performance" model. It is the ideal choice if your home meets the following criteria:
In Ontario, freezing groundwater temperatures (dropping to ~40°F / 4°C) can reduce the flow rate of smaller units by up to 50%. The 199,000 BTU burner in the NPE-240A2 is built to overcome this thermal shock.
How the NPE-240A2 performs in an Ontario Winter:
For a busy house with teens, guests, or small children, the NPE-240A2 offers superior peace of mind:
The NPE-240A2 includes a built-in insulated buffer tank and recirculation pump.
Cheap tankless units fluctuate temperature when you turn the tap off and on.
Despite being a 199k BTU commercial-grade unit, it operates quietly, allowing for flexible installation locations (laundry rooms, closets) without disturbing the household.
For a large family home with luxury fixtures or simply high demand, the NPE-240A2 is the definitive choice.
If you never want to hear "Who used all the hot water?" or worry about scheduling showers around the laundry, the 199,000 BTU engine of the NPE-240A2 is the investment that pays off in daily comfort.
Every Navien NPE-240A2 tankless water heater comes with one of the strongest warranties in the industry:
15-Year Heat Exchanger Warranty
Premium stainless-steel dual heat exchangers designed for long lifespan and corrosion resistance.
5-Year Parts Warranty
Covers internal components, sensors, valves, controls, and electronics.
2-Year Warranty on Built-In Recirculation Pump
Ensures reliable performance over time.
All professional installations by 4Most Energy include:
1-Year Labour Warranty (standard)
Full coverage on installation workmanship, adjustments, and commissioning.
Optional Extended Labour Protection — Up to 10 Years
Add 4Most Protect for long-term peace of mind:
Priority service
Discounted maintenance
No labour charges for repairs
Annual system check options
4Most Energy is a Certified Navien Installer.
This means:
✔ We can file and process Navien warranty claims
✔ Faster response times
✔ Direct access to Navien tech support
✔ No third-party complications
Your warranty always remains valid with 4Most Energy because we install the system to Navien standards.
To keep your Navien NPE-240A2 performing at its best, 4Most Energy recommends:
A technician checks:
Combustion settings
Fan motor
Sensors
Burner condition
Exhaust and venting
Gas pressure calibration
Lime and mineral buildup can reduce flow rate and efficiency.
Frequency depends on local water hardness.
Ensures proper water flow and prevents internal wear.
For homes using the ComfortFlow® feature regularly.
✔ Keeps efficiency at 95%+
✔ Extends lifespan to 15–20 years
✔ Prevents unexpected breakdowns
✔ Protects warranty
✔ Reduces gas consumption
4Most Energy provides annual service plans and reminders, so you never miss a maintenance cycle.
At 4Most Energy, we proudly provide professional HVAC, Boiler, Tankless, Furnace & Heat Pump installation across the Greater Toronto Area and Southern Ontario.
Greater Toronto Area: Toronto, Mississauga, Brampton, Markham, Vaughan, Richmond Hill, Aurora, Newmarket, Scarborough.
Extended Service Area: Stouffville, Oshawa, Barrie, Orangeville, Hamilton, St. Catharines, Guelph, Kitchener.
Our certified technicians offer fast response, transparent pricing, and warranty-backed installation wherever you are.
Designed for the Navien NPE-A Series
Stops recirculation automatically at 95°F (35°C)
Works with Navien HotButton® for demand-style recirculation
Kit #30022965A includes the valve (PFFW-SXX-001) and two flexible hoses with adapters
Answered by 4Most Energy Experts
The Navien NPE-A2 Series includes three sizes designed for different home demands:
NPE-180A2 → 150,000 BTU • Up to 8.4 GPM • Ideal for small–medium homes (1–2 bathrooms)
NPE-210A2 → 180,000 BTU • Up to 10.1 GPM • Great for medium homes (2–3 bathrooms)
NPE-240A2 → 199,000 BTU • Up to 11.2 GPM • Best for large homes (3–5 bathrooms) All models feature Navien’s built‑in ComfortFlow® recirculation pump + buffer tank.
Yes. All models in the NPE-A2 Series include Navien’s ComfortFlow® pump and an integrated buffer tank for faster hot water and reduced water waste.
The buffer tank minimizes temperature fluctuations, eliminates the “cold-water sandwich,” and stabilizes hot-water delivery during intermittent use.
4Most Energy recommends:
Annual inspection
Descaling every 2–3 years
Cleaning inlet filters once a year Routine maintenance protects efficiency and warranty coverage.
Yes. The NPE-A2 Series can be paired with hydronic air handlers, allowing the system to provide both domestic hot water and forced-air home heating.
Yes. We provide flexible financing options:
3-month no-payment
12-month equal payments
24-month equal payments
60-month low-monthly plans
Yes. Homes with a dedicated return line benefit from ultra-fast, energy-efficient recirculation using the built-in ComfortFlow® pump.
You can still enjoy fast hot water using the NaviCirc® Valve, which uses existing hot and cold water lines to create a recirculation path without additional plumbing.
Ideal for older homes
Works automatically at ~95°F (35°C)
Compatible with Navien HotButton®
Perfectly designed for the NPE-A2 Series
We provide full installation and service across Ontario, including: Toronto, North York, Scarborough, Etobicoke, Mississauga, Brampton, Vaughan, Richmond Hill, Markham, Newmarket, Aurora, Hamilton, Burlington, Oakville, Guelph & Kitchener-Waterloo.
Navien parts are widely available in Ontario through certified distributors. As a Navien-certified installer, 4Most Energy can source parts quickly for repairs and warranty service.
You can extend coverage up to 10 years with 4Most Energy’s protection plans, which include discounted maintenance and zero labour fees for repairs.
4Most Energy is a certified Navien installer with 10+ years of tankless experience, offering:
Proper sizing and gas-line evaluation
Professional installation and commissioning
Ontario-wide service
Extended labour warranties
Fast access to Navien parts and support We ensure your Navien NPE-A2 system performs at its highest efficiency.
A simple 3-step process to get your Navien Boiler professionally installed anywhere in Ontario.
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Off-season pricing means the best deals of the year on high-efficiency air conditioners.
Save Big on Lennox Furnaces — Limited Time!
Get a new high-efficiency Lennox furnace with no payments for up to 6 months. Premium comfort, top-tier performance.
Simple estimates, flexible payments, pro installation, and industry-leading warranties.
