Rinnai · SENSEI RX / RXP (condensing) · Gas tankless
Rinnai RX180iN
The Rinnai RX180iN is an indoor condensing natural gas tankless water heater in Rinnai's current RX flagship series: 15,000–180,000 BTU/h, UEF 0.98, up to 10.0 GPM (38 L/min) maximum flow at an unstated rise, Wi-Fi control and ENERGY STAR marked on rinnai.ca.
Key figures
- Max input
- 180,000 BTU/h
- Flow at unspecified rise rise
- 10.0 GPM (38 L/min)
- Uniform Energy Factor (UEF)
- 0.98
Flow figures depend on temperature rise; compare only at the same rise. Max flow is not guaranteed winter performance.
Rinnai RX180iN in practice
The RX180iN sits one step below the RX199iN in Rinnai Canada's current flagship series, sharing the RX platform's UEF 0.98 and Wi-Fi control with a 180,000 BTU/h cap and a 10.0 GPM (38 L/min) maximum flow, both quoted without a temperature rise. The flow tables in manual 100000839 govern the winter figure at Metro Vancouver's roughly 40 °C rise.
Installation follows the RX platform pattern: PVC, CPVC or polypropylene venting, a 3/4 in gas connection sized for the input, a condensate drain and 120 V power. The platform is certified SCAQMD ultra-low-NOx and marked ENERGY STAR on the Canadian listing. Whether CANRO stocks this model for a given job is confirmed at consultation.
Best suited to
- Two-bathroom homes wanting the RX platform at a lower input than the RX199iN
- Buyers who want UEF 0.98 and Wi-Fi without the full 199,000 BTU/h gas draw
- Homes where the gas supply limits the input the tankless unit can use
Limitations to know
- Maximum flow is quoted without a temperature rise; winter delivery at a 40 °C rise is far lower
- Requires 120 V power; no hot water during an outage
- Annual descaling is a warranty condition; lime damage is excluded
Applicability and support
- Model number
- RX180iN
- Variants on this page
- RX180iP (Propane, indoor)
- Canadian availability
- available
- Production status
- current
- CANRO supplies
- Confirmed at consultation
- CANRO services
- Confirmed at consultation
- Recirculation
- Yes, external pump and piping required
- Warranty
- Series terms
Recirculation-capable with Rinnai's controls and an external pump (dedicated return line or crossover valve). Recirculation makes hot water quicker at the tap, not instant, and adds gas use.
Where CANRO provides on-site service
On-site service is currently offered across Metro Vancouver: Vancouver, Burnaby, Richmond, Surrey, Coquitlam, North Vancouver, West Vancouver, New Westminster, Delta, Langley, Port Moody, Port Coquitlam, Maple Ridge, Pitt Meadows, White Rock, Tsawwassen; plus Anmore, Belcarra, Lions Bay, Bowen Island, Abbotsford with travel or ferry arrangements confirmed by phone. Everything else on this site is reference information you can use anywhere in Canada.
Specifications
Published specifications
Values as published by Rinnai. Manufacturer gallon and BTU/h figures are preserved with metric alongside; notes flag conflicting documents and missing figures. Groups expand for detail.
Flow (tankless) 2
| Specification | Value | Note |
|---|---|---|
| Maximum domestic hot-water flow | 10.0 GPM (38 L/min) at unspecified rise rise | Maximum flow as listed on rinnai.ca. Not winter performance: at a 40 °C rise the deliverable flow is far lower; the flow-at-rise table is in manual 100000839. |
| Minimum activation flow | 0.4 GPM (1.5 L/min) | Per Rinnai's SENSEI platform documentation. |
Input 2
| Specification | Value | Note |
|---|---|---|
| Minimum gas input | 15,000 BTU/h | 4.4 kW. Per rinnai.ca. |
| Maximum gas input | 180,000 BTU/h | 52.8 kW. Per rinnai.ca. |
Efficiency 1
| Specification | Value | Note |
|---|---|---|
| Uniform Energy Factor (UEF) | 0.98 | Per rinnai.ca. ENERGY STAR is marked on the Canadian listing; the draw pattern is not printed. |
Temperature 1
| Specification | Value | Note |
|---|---|---|
| Outlet temperature setting | 37–49 °C (98–120 °F) default range | Fixtures are limited to 49 °C by BC code; extended settings follow manual 100000839. |
Venting and air 1
| Specification | Value | Note |
|---|---|---|
| Vent material | PVC, CPVC or polypropylene (condensing) | Common-venting instructions are published separately (100000625 PVC/CPVC, 100000557 polypropylene). |
Connections 3
| Specification | Value | Note |
|---|---|---|
| Gas connection | 3/4 in | Per rinnai.ca connection list. |
| Water connections | 3/4 in cold inlet and hot outlet | Per rinnai.ca connection list. |
| Condensate drain | 1/2 in NPT (13 mm) | Condensate is acidic; drain to an approved location. |
Electrical 1
| Specification | Value | Note |
|---|---|---|
| Electrical supply | 120 V, 60 Hz | Wi-Fi capable per rinnai.ca. |
Physical 4
| Specification | Value | Note |
|---|---|---|
| Height | 30.11 in (762 mm) | Per Rinnai's dimension list. |
| Width | 18.5 in (470 mm) | |
| Depth | 11.4 in (291 mm) | |
| Weight | 55 lb (24.5 kg) |
Operating limits 1
| Specification | Value | Note |
|---|---|---|
| Certification | SCAQMD ultra-low-NOx approved | Per rinnai.ca. |
Manuals
Maintenance the manufacturer specifies
- Flush (descale) the heat exchanger at least once a year using the included isolation valves; Rinnai states lime damage is not covered by warranty and hard water needs more frequent flushing.
- Set the Service Soon reminder (parameter 03: 0.5, 1 or 2 years) so the display prompts the next flush.
- Clean the cold-water inlet filter screen periodically.
- Register within 90 days of installation to keep the 5-year labour warranty; otherwise labour defaults to 1 year.
Fault codes documented for this model
None documented yet.
Services
Hot water and scalding
- Water above 49 °C at a tap can scald in seconds, and children and older adults are at most risk. BC's plumbing code limits shower and bathtub water to 49 °C.
- Storage tanks are normally kept hotter (Health Canada advises 60 °C) to limit Legionella growth, with a thermostatic mixing valve tempering the water to the fixtures.
- Never bypass or remove a mixing valve, thermostat or high-limit control to get hotter water.
Official guidance: Government of Canada on water temperature and scalds and HealthLinkBC.
Frequently asked questions
How does the RX180iN differ from the RX199iN?
It is capped at 180,000 BTU/h with a 10.0 GPM maximum flow against the RX199iN's 199,000 BTU/h and 11.1 GPM. Both share UEF 0.98, the same cabinet and the same RX platform features.
Is the RX180iN sold in Canada?
Yes. It has a live product page on rinnai.ca as of the verification date.
Is the RX180iN ENERGY STAR certified?
rinnai.ca marks the model ENERGY STAR on its Canadian product page; certification status is as published by Rinnai on that page.
Questions about the Rinnai RX180iN?
Describe what the water heater is doing and get a straight answer about the next step.
On-site service in Metro Vancouver, BC. Call to check availability.
Sources and verification
- Rinnai Canada — RX180iN product page · Canadian source · accessed September 7, 2026
- Rinnai Canada — Tankless Water Heaters listing · Canadian source · accessed September 7, 2026
Facts checked September 7, 2026. Last updated September 7, 2026. Technical reviewer: not yet assigned.