Rinnai RXP199iN Tankless Water Heater, Recirculation Pump Built-In
Stop waiting for hot water. The Rinnai RXP199iN represents the pinnacle of tankless water heating technology. As the flagship model of the SENSEI® RX Series, this unit combines maximum power (199,000 BTU) with Rinnai’s exclusive Smart-Circ™ Intelligent Recirculation technology.
Designed specifically for large homes and the demanding winters of Southern Ontario, the RXP199iN ensures you have instant, endless hot water for every shower, dishwasher, and laundry load, all running simultaneously.
Key Features
Built-In Recirculation Pump: Unlike standard tankless units, the RXP199iN includes a powerful pump that circulates hot water through your pipes, eliminating the wait at the tap and saving thousands of gallons of water per year.
Smart-Circ™ Intelligence: The unit "learns" your family's usage patterns over 7 days. Do you shower at 7:00 AM? The unit spins up automatically at 6:55 AM to ensure hot water is waiting for you.
Maximum Power (11.1 GPM): The highest flow rate in its class, capable of running 3 to 4 showers simultaneously without a drop in pressure or temperature.
Super High Efficiency (0.98 UEF): Rated as Energy Star® Most Efficient, converting 98% of fuel into heat. This drastically lowers your gas bill compared to traditional tanks.
Stainless Steel Heat Exchanger: Features a commercial-grade 444 Stainless Steel heat exchanger for superior resistance to corrosion and thermal stress, ensuring a longer lifespan.
Smart Sense™ Gas Technology: Automatically adapts to Natural Gas or Propane supply without requiring a separate conversion kit.
Check Your Home’s Compatibility & Installation Price
No hidden fees. Just accurate math based on your home’s specs.
Never Wait for Hot Water Again
Experience the convenience of Smart-Circ™ Intelligent Recirculation™ — built directly into Rinnai RXP tankless models. Your tankless system learns your household’s hot-water usage patterns and automatically circulates warm water through your plumbing, giving you faster hot water when you need it.
No dedicated return line? No problem.
A simple thermal bypass valve added to your cold-water line enables full recirculation in homes without a return loop. Once installed, the system runs automatically using your learned schedule for maximum comfort and efficiency.
Why Install the Rinnai RXiN with 4Most Energy?
| Specification | RXP199iN | RXP160iN |
|---|---|---|
| Heating Capacity (BTU) | 199,000 BTU | 160,000 BTU |
| Maximum Flow Rate | 11.1 GPM | 9 GPM |
| Built-In Recirculation Pump | Yes | Yes |
| Fuel Type | Natural Gas | |
| Efficiency (UEF) | 0.98 (Super High-Efficiency) | 0.97 (High-Efficiency) |
| Energy Star | Yes | Yes |
| Venting Type | Direct Vent | |
| Wi-Fi Capable | Yes (Optional module) | |
| Dimensions (H × W × D) | 30.1" × 18.5" × 11.4" | |
| Weight | 58 lbs | |
| Warranty – Heat Exchanger | 15 Years / 12,000 hours | |
| Warranty – Parts | 5 Years | |
| Warranty – Labour (4Most Energy) | 1-Year Equipment Warranty 5-Year Labour Warranty (4Most Installation Only) |
Ideal For:
- Homes with 3–5+ bathrooms
- Large families (5+ people) with high daily usage
- Upgrading from a large tank (60–75 gallon) or older tankless
- Large detached homes, luxury estates, and custom builds
- Homes that want recirculation (instant hot water) without installing new return lines (using thermal bypass valve technology)
Not Ideal For:
- Small Condos or 1-Bathroom Apartments (Overkill for the space/demand)
- Low demand households (1-2 people) where simultaneous usage is rare (For those homes, the RX160iN is a more cost-effective fit.)
When to Consider a Dual (Cascade) System:
While the RXP199iN is incredibly powerful, some luxury applications require even more. 4Most Energy can link two units together for:
- Estate Homes (6+ Bathrooms): Homes exceeding 5,000 sq. ft. often need redundant systems to handle peak loads.
- Luxury "Car Wash" Showers: Master ensuites with multiple body sprays, rain heads, and handhelds often exceed 11 GPM on their own.
- Absolute Redundancy: Two units ensure you never lose hot water, even if one unit requires maintenance.
| Step | Details |
|---|---|
| 1. Home & System Check | Proper sizing based on bathrooms, fixtures, gas line capacity, venting, and plumbing. Ensures the right tankless model for your home. |
| 2. Removal of Old Equipment | Safe disconnection, draining, removal, and eco-friendly disposal of your old tank or tankless water heater. |
| 3. Install & Mount the New Rinnai | Wall prep, mounting brackets, clearance verification, and setup for optimal servicing and performance. |
| 4. Gas, Venting & Condensate | Installation of new PVC/CPVC/SS venting, gas line upgrades if needed, fresh air setup, and proper condensate drain with neutralizer. |
| 5. Water Lines & Recirculation Setup | New isolation valves, clean hot/cold connections, and recirculation configuration for faster hot water. |
| 6. Full Testing & Commissioning | Gas/water leak check, startup diagnostics, combustion analysis, flow rate adjustment, and temperature calibration. |
| 7. Cleanup, Training & Warranty Registration | Work area cleaned, old equipment removed, homeowner training completed, and warranty registered under your name. |
Why Choose the RXP199iN?
1. Instant Hot Water (No More Waste)
The "P" in RXP stands for Pump. In standard tankless installs, you flush cold water down the drain while waiting for the hot water to travel from the basement. The RXP199iN solves this with a built-in recirculation pump.
Note: Requires a dedicated return line or a thermal bypass valve installed at the furthest fixture.
2. Engineered for Ontario Winters
In the GTA, groundwater enters your home near freezing during winter. Lower-power units struggle to heat this water quickly, resulting in lukewarm showers. The RXP199iN’s massive 199,000 BTU burner guarantees steaming hot water even in the dead of January.
3. Whisper Quiet Operation
The new SENSEI® RX design minimizes operational noise, making it quieter than a dishwasher. You won’t even know it’s running.
Rinnai RXP199iN Tankless FAQs
Will the Rinnai RXP199 provide enough hot water for my home?
Yes. The Rinnai RXP199iN is the most powerful unit in the residential lineup, producing up to 11.1 Gallons Per Minute (GPM). This is ideal for larger homes in Ontario with 3 to 4+ bathrooms running simultaneously. As a Rinnai Pro Installer, 4Most Energy ensures this unit is correctly sized to deliver its full 199,000 BTUs of power, ensuring you never run out of hot water—even if you are running multiple showers, the dishwasher, and laundry at the same time.
How does the Rinnai RXP199iN handle Ontario winters?
In Southern Ontario, groundwater temperatures drop significantly in winter, which forces tankless units to work harder. The RXP199iN features maximum power (199k BTU) to raise that freezing cold winter water to your desired temperature without losing pressure. Our Rinnai Pro technicians calibrate the unit specifically for local winter conditions to ensure consistent comfort year-round.
What is included in the "Standard Installation" price?
Our standard package covers the complete replacement of a similar unit. This includes:
Disconnecting and disposing of your old water heater.
Mounting the new Rinnai RXP160.
Connecting to existing gas, water, and electrical lines (within 5 feet).
Standard venting connection.
Why do I need an "Installation Verification" for the estimate and before installation?
Every home in the Greater Toronto Area is different. Older homes in Toronto or Hamilton may have smaller gas lines (1/2") or specific venting challenges. As certified Rinnai Pro Installers, we follow strict manufacturer guidelines to verify these needs before installation day, protecting you from surprise costs and ensuring your warranty remains valid.
Can I install this unit with my existing gas line?
This depends on the total BTU load of your other appliances. As Rinnai Pro experts, we calculate the precise load during our verification step to guarantee safety and efficiency.
How does the "Built-in Recirculation" work in RXP199iN?
The RXP160 features a built-in pump and Smart-Circ™ Intelligent Recirculation, which "learns" your usage patterns to circulate hot water in advance. 4Most Energy Rinnai Pros are trained to configure this system correctly so you get near-instant hot water without the wait.
Do I need extra parts to use the recirculation feature?
Yes. If you do not have a dedicated hot water return line, we must install a Thermal Bypass Valve (Crossover Valve) under your furthest sink. Additionally, we strongly recommend installing an Expansion Tank to prevent "water hammer" (banging pipes). Our Pro Installers will verify your plumbing layout and quote these specific parts accurately.
Does Rinnai RXP tankless unit need maintenance?
A: Yes. Although it is a very low maintenance unit, we do recommend regular maintenance for safety and performance.
Annual Safety Check ($120–$200): Our Rinnai Pro technicians perform a comprehensive check-up every year to inspect safety features, check the vent and drain systems, and perform a gas leak test.
Descaling Service ($300–$400): You do not need to descale every year. We recommend a full descaling every 5 years to flush out mineral buildup and restore efficiency
Why do I need a "Rinnai Pro Installer"?
Rinnai strongly recommends professional installation to guarantee safety, performance, and warranty validity. As an authorized Rinnai Pro, we offer benefits that a general handyman or uncertified plumber cannot:
Exclusive Warranty Extension: Standard labor warranties are typically 1 year. As a Rinnai Pro, 4Most Energy can register your product (within 90 days) to upgrade your labor coverage to 5 years (subject to Rinnai's terms).
Factory Training & Expertise: Our technicians complete rigorous Rinnai training (Level II & III) to master sizing, venting, and complex parameter settings. This ensures your unit is calibrated perfectly for Ontario's cold groundwater and altitude, preventing early failure.
Safety & Code Compliance: Tankless units require precise gas line sizing and venting clearance. We ensure every installation meets TSSA (Technical Standards and Safety Authority) and Ontario Building Code regulations to keep your family safe from CO hazards.
Priority Support: If an issue ever arises, Rinnai Pros have access to dedicated advanced technical support lines, ensuring faster diagnostics and repairs than non-certified installers.
Why should I trust 4Most Energy for my Rinnai tankless installation?
No Outsourcing: You work directly with our licensed experts, not a sales call center.
Local Stock: We carry parts and units locally for faster service in the GTA.
Comprehensive Quotes: We provide detailed, all-inclusive estimates that cover the equipment, installation, taxes, warranty registration, and disposal. No hidden fees, and backed by our 30-Day Customer Satisfaction Guarantee.
Transparent Pricing: We verify your home first so you get a clear, final price with no surprise fees.
How is the warranty with 4Most Energy?
When you choose us, you get:
15-Year Manufacturer Warranty on Heat Exchanger.
5-Year Manufacturer Warranty on Parts.
1-Year Labour Warranty from 4Most Energy (Standard).
Bonus: We register your unit with Rinnai to potentially extend labour coverage up to 5 years.
Do 4Most Energy offer financing Rinnai Tankless?
Yes. We offer flexible financing plans (such as our "4Most Smart Pay" program) to help you upgrade without a large upfront cost. We also work with third-party lenders and can assist with eligible government programs like the Canada Greener Homes Loan. Ask our team for current rates and zero-interest offers!
How can I get a promotion or discounted price on a Rinnai Tankless?
Rinnai is a high-demand best-seller in Ontario, but at 4Most Energy, we still offer several ways to save:
Bundle & Save: Get a discount when you install a Rinnai tankless unit together with a furnace or heat pump.
4Most Smart Pay Financing: Ask about our current "4Most Smart Pay" promotions, which may include zero-interest periods or deferred payments.
Seasonal Offers: Check our "Promotions" page or ask our expert for seasonal discounts on Rinnai units.
Do you offer emergency services?
Yes. We provide 24/7 emergency support for "no heat" or "no hot water" situations across the Greater Toronto Area. If your system fails in the middle of winter, our certified technicians are on call to get you back up and running quickly.
Where do you provide installation?
4Most Energy as a premier Rinnai Pro Installer in the region, we provide expert verification and installation across 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.
