What replacing a Rinnai SENSEI RU condensing tankless unit involves for a Burnaby, Metro Vancouver home.
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Quick answer
When a Rinnai SENSEI RU condensing tankless unit in a Burnaby home is past the point where repair makes sense, replacement means matching a new unit to the home's actual hot water demand and confirming the venting and gas line still meet current code. A CANRO technician scopes this during an assessment before quoting the job.
Need a licensed gas fitter for your tankless water heater? Call CANRO at (604) 359-1081 — residential natural-gas heating and hot water across Metro Vancouver since 1999.
When a Rinnai SENSEI RU unit in a Burnaby home is approaching the point where repairs no longer make sense, the decision usually comes down to age, repair history, and how the unit is performing day to day.
The SENSEI RU series is a condensing tankless water heater, and like any tankless unit it has a working service life measured in years of reliable operation, after which the cost and frequency of repairs starts to outweigh the value of keeping the old unit running.
Hot water that's slower to reach full temperature than it used to, even though household routine hasn't changed.
Repair visits becoming more frequent, especially if a technician has flagged the heat exchanger rather than a smaller part.
A fault indicator that keeps returning after a repair, usually a sign of underlying wear rather than one bad component.
A Burnaby household that's added a laneway suite or extra bathroom since the original unit was sized.
Because the SENSEI RU is a condensing unit, replacement isn't always a straight one-for-one swap — venting material, condensate drainage, and gas line sizing all need to be confirmed against the new unit's requirements, not assumed from the old installation.
CANRO's technicians hold Technical Safety BC gas licensing for exactly this kind of work, and any gas line or venting changes are permitted and inspected properly rather than left as-is.
A CANRO technician starts by assessing the existing gas line, venting and mounting location against current code rather than assuming the old setup carries over.
Any venting or gas line work needed for the new unit is scoped and quoted upfront, not discovered mid-install.
A gas permit for the work is pulled through the City of Burnaby before installation begins.
Once mounted and connected, the technician commissions the unit — gas pressure, venting draft, water flow — and walks the homeowner through operation.
Housing in Burnaby ranges from 1960s and '70s bungalows around Metrotown and Edmonds to newer townhouse complexes and laneway homes, so a tankless unit might be venting through an older brick chimney chase, a tight mechanical closet, or a brand-new exterior wall.
Older Burnaby homes often have the gas meter and exterior wall venting point tucked along a narrow side yard, which a technician has to account for when planning combustion-air and vent clearances.
Burnaby draws from the same Metro Vancouver reservoir supply as most of the region, so the water reaching a SENSEI RU heat exchanger here is soft and low in mineral content compared to well-fed communities further out in the valley.
Burnaby's mix of single-family lots and rezoned multi-family sites also means some homes have had their gas service upgraded or relocated over the years, which is worth checking before any replacement gas line sizing is assumed.
If the existing unit has a single, isolated failure and is still within a reasonable service life, repair is usually the more cost-effective path.
If the heat exchanger itself has failed, if repairs are becoming frequent, or if the household's hot water demand has grown past what the current unit can supply, replacement is typically the better long-term option — and CANRO will lay out both costs side by side so the decision is yours to make with real numbers.
A full tankless replacement covers the new unit, labour, and any venting or gas line work needed to bring the installation up to current code.
| Item | 2026 ballpark range |
|---|---|
| Tankless water heater replacement, installed | $3,500–$7,500 |
Where that number lands for a specific home depends on whether the existing venting and gas line can be reused as-is, how accessible the mechanical space is, and whether any code-driven upgrades are needed.
These are 2026 public-market ballparks, not a quote for your home — CANRO's certified technicians confirm the actual number after a short in-person assessment of your unit and venting.
Safety note
If you ever smell gas, hear a hissing sound near the gas line, or your carbon monoxide alarm sounds, leave the home immediately and call FortisBC at 1-800-663-9911 from outside before doing anything else. Gas connections, venting and combustion work on a tankless unit must only be handled by a Technical Safety BC licensed gas fitter.
A straightforward like-for-like swap is usually a single visit, while a job that also needs venting or gas line upgrades can take longer. CANRO scopes this during the assessment so there's no surprise on install day.
Sometimes, but not always — it depends on whether the existing setup still meets current code and whether the new unit's requirements match the old one. A technician confirms this before quoting the job.
Yes, gas and venting work for a replacement requires a permit, which CANRO pulls through City of Burnaby as part of the installation process.
Not necessarily. Sizing depends on how many fixtures run hot water at once in your home, not just square footage, so a technician calculates this rather than defaulting to the largest available unit.
It's disconnected and removed as part of the installation. CANRO handles the removal so you don't need to arrange separate disposal.
Yes, for the duration of the install visit, which CANRO will walk you through when the appointment is booked so you can plan around it.
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