Replacement usually makes sense once an RL series unit's repair costs stack up or its venting has reached the end of its usable life, and a like-for-like or upgraded swap is typically a single visit.
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Quick answer
An aging RL series unit is worth replacing once repairs start recurring on the same components, or once the venting itself needs replacing along with the heater. The RL series is a non-condensing tankless water heater, and that distinction matters for replacement because it affects venting material, install cost, and whether an upgrade to a condensing model is worth considering.
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A straight swap for another RL series unit keeps the existing stainless steel venting in play if it's still sound, which is usually the faster and simpler job. Some homeowners instead ask about upgrading to a condensing model at replacement time — a condensing unit typically vents with PVC instead of stainless steel, which can lower material cost on new venting runs, but it also adds a condensate drain and trap that a non-condensing unit doesn't need. Whether that trade-off makes sense depends on the specific venting run and mechanical room, and it's worth discussing with the technician during the assessment rather than deciding sight-unseen.
CANRO pulls the required municipal gas permit, disconnects and removes the old unit, checks gas line sizing and pressure against the new unit's requirements, inspects the existing venting for reuse or flags it for replacement, installs and commissions the new unit, and confirms proper operation before signing off. If the venting needs replacing along with the unit, that's scoped and priced as part of the same visit.
The 2026 public-market ballpark for a tankless installation across Metro Vancouver is $3,500 to $7,500 for the installed unit and labour — a ballpark, not a quote, confirmed by CANRO's certified technicians after a short on-site assessment. Venting replacement, gas line upsizing, or relocating the unit will push a job toward the higher end of that range.
| Scope | Typical cost position |
|---|---|
| Like-for-like swap, venting reused | Lower end of the range |
| New venting required | Adds material and labour |
| Upgrade to a condensing model with new PVC venting | Varies with run length and access |
A recommendation to replace rather than repair isn't made from a single symptom. The technician reviews the unit's documented repair history if it's been serviced before, inspects the venting and condensate or exhaust path for condition regardless of the specific fault, and checks whether the gas line and electrical connection still meet current requirements for the household's demand. A unit that's had one isolated fault and is otherwise sound is treated differently from one with a pattern of recurring issues, even if both are the same age.
This matters because replacing a unit that only needed a straightforward repair wastes money, while repairing a unit that's genuinely at the end of its useful life just delays an expense that's coming anyway — often at a less convenient time, like mid-winter with no hot water. CANRO's technicians lay out both options honestly with the reasoning behind the recommendation rather than defaulting to whichever is more profitable for the visit.
Safety note
A gas smell, a scorched panel, or repeated ignition lockouts are not a DIY project. Get everyone out of the house and call FortisBC's emergency line, 1-800-663-9911, first. Do not attempt to reset a flame or venting safety lockout more than once without a licensed gas fitter looking at the unit.
Yes, and it's a reasonable time to consider it since a full venting change is often needed either way, but the switch involves new venting material and a condensate drain.
Not always — if it's in good condition and still meets current code clearances, it can often be reused for a like-for-like unit.
Venting can outlast one or two units if it was installed correctly and isn't damaged, but it should still be inspected at every replacement rather than assumed to be fine.
Sizing depends on your home's fixture count and simultaneous demand; this is assessed on site rather than guessed from the old unit's rating alone.
Yes, any gas water heater replacement requires a municipal gas permit pulled by a licensed gas fitter, regardless of whether the new unit matches the old one.
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