Tankless costs more upfront in a Renfrew home mainly because of gas line upsizing and new venting, not the unit itself.
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Quick answer
A gas tankless water heater installation in Renfrew typically costs $3,500 to $7,500, largely depending on whether the existing gas line can handle the unit's higher draw. This is a 2026 public-market ballpark, not a quote — CANRO's technicians confirm the real number after assessing your gas supply and venting.
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.
Tankless units pull a much larger gas load for short bursts compared with a storage tank's steady, lower demand, and a lot of Renfrew's older housing stock was piped decades ago for a standard storage tank, not a tankless unit. Upsizing that line is common and adds real labour and material cost, which is the single biggest reason tankless installs land toward the top of the range in this neighbourhood.
Venting is the other factor — tankless units need sealed, direct venting rather than the older atmospheric flue setups still found in many Renfrew basements, so that's typically new work too.
| Component | Typical range |
|---|---|
| Tankless unit installed, gas line adequate | lower portion of $3,500–$7,500 |
| Tankless unit installed, gas line upsizing needed | upper portion of $3,500–$7,500 |
A Vancouver gas permit is required in addition to the installation itself, pulled by the licensed installer as part of the job.
Tankless suits households with a genuinely tight mechanical space, or homeowners eliminating a storage tank to reduce leak risk in a finished basement. For a household simply replacing a worn-out tank with no particular space constraint, a standard storage tank replacement is usually the more cost-effective choice, since it avoids the gas line and venting upgrades tankless often requires in this older housing stock.
Renfrew has seen a steady wave of basement renovations and laneway builds in recent years, and tankless installation is frequently bundled into those projects rather than tackled as a standalone job. When the walls are already open for a renovation, running the larger gas line and new venting a tankless unit needs adds far less disruption than doing the same work in a finished basement later. If a renovation is already planned, raising water heater options with the contractor at the framing stage is worth the conversation.
For homeowners not tied to a renovation timeline, scheduling the upgrade proactively — rather than waiting for the existing tank to fail — avoids paying an emergency premium layered on top of the installation itself.
Safety note
Tankless installation involves gas line sizing and venting work that must be performed by a Technical Safety BC licensed gas fitter — CANRO holds gas licence LGA0043870. If you smell gas near the unit, leave the home and call FortisBC at 1-800-663-9911 from outside.
Many homes here were piped for a storage tank's lower gas draw, so upsizing the line for a tankless unit's higher demand is common and adds cost.
It can — if both draw from the same gas meter, total load needs to be checked to make sure the supply is adequate.
Not always — for modest hot water demand, a storage tank replacement is often the more economical route.
Yes, periodic descaling keeps the heat exchanger efficient, though Renfrew's soft reservoir water is relatively gentle compared to hard-water regions.
Yes, Vancouver requires a permit for the gas line and venting work involved in a tankless installation.
No — it's a ballpark from 2026 public market data. CANRO confirms the actual installed price after assessing your gas line and mechanical room.
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