How to tell an aging IBC SFT Superflow tankless unit in a Vancouver home has reached the end of the road, and what the swap-out actually involves.
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Quick answer
An IBC SFT Superflow is generally worth replacing once the heat exchanger has failed, the unit needs repeated repairs, or its venting no longer meets current code after a renovation. In Vancouver, replacement also involves a permit through the City of Vancouver and, in many older homes, reworking a mechanical space that was never built with a condensing unit's venting and condensate needs in mind.
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Every tankless unit eventually reaches a point where continuing to fix it costs more, over time, than replacing it outright. For the SFT Superflow, the clearest signal is heat exchanger failure - cracking, corrosion, or a leak inside the unit - because that component drives most of the unit's cost and isn't something you patch. A close second is a unit that has needed two or three unrelated repairs inside a short window; at that point you're paying labour repeatedly on a unit that is simply wearing out across the board, not failing at one fixable point.
We won't quote you an expected lifespan in years, because how long any tankless unit lasts depends heavily on water quality, install quality, and how consistently it's been maintained - a technician assessing your specific unit's condition is more useful than a generic number.
A lot of Vancouver's housing predates the tankless technology it's often retrofitted into - Vancouver Specials from the 1960s and 70s, character homes in Kitsilano or Riley Park with original knob-and-tube long since replaced but mechanical rooms otherwise unchanged, and post-war bungalows with basements that were never designed around a sealed-combustion vent run. Replacing a tankless unit in one of these homes usually means reconfirming the vent route meets current clearance-to-openings rules, since an older install may predate the code revision that governs how close a vent terminal can sit to a window, door, or property line.
Laneway houses and basement suites have also added real hot water demand to a lot of Vancouver lots, which is worth flagging to your technician if your household's hot water use has grown since the original unit went in - a straight one-for-one swap isn't always the right call if demand has changed.
Gas permits in Vancouver go through the City of Vancouver directly rather than through Metro Vancouver as a regional body, and a Technical Safety BC licensed gas fitter typically handles the permit application as part of the job. On install day, the crew isolates and removes the old unit, inspects the wall penetration and vent terminal, sets the new unit, reconnects gas, water, vent, and condensate, then pressure-tests the gas line and runs a combustion check before calling the job done.
Ask whether your existing venting can be reused or needs replacing - this is often the single biggest cost swing in a Vancouver retrofit because older vent material or routing frequently doesn't meet current standards for a condensing unit. Ask whether your gas meter and line sizing can support the new unit alongside your furnace or boiler, since tankless units draw more gas instantaneously than the tank heater they're often replacing. And ask what happens to your old unit and any existing venting - responsible removal should be part of the quote, not an add-on.
Tankless install runs $3,500 to $7,500 as a 2026 public-market ballpark, not a quote - the wide range reflects how much of the venting and gas piping is reusable versus needing replacement, and whether the mechanical space needs any modification. CANRO's certified technicians walk your specific install and give you a firm number after that assessment, rather than before it.
Safety note
If you smell gas anywhere near the unit or notice soot, staining, or a strange odour around the vent terminal, leave the home and call FortisBC's emergency line at 1-800-663-9911 right away before doing anything else.
Yes, if your household's hot water demand has grown - a technician can size the replacement to your current fixture count and usage rather than just matching the old unit.
Not automatically, but it needs inspecting. Older vent material or routing that predates current condensing-unit standards often does need updating during a swap.
Timelines vary and we won't promise a number here, but a licensed gas fitter who regularly files with the City of Vancouver can give you a realistic expectation for your specific job.
Sometimes, especially in older homes where the original spot was a compromise. It's worth discussing if your basement layout has changed or a renovation is planned.
That's a separate conversation from a straight tankless-to-tankless swap - ask your technician what's realistic for your specific mechanical room.
Not on its own. Pressure issues usually trace back to pipe sizing or municipal supply pressure, not the water heater itself.
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