A New Westminster tankless replacement is often the first real chance to fix a mechanical space that was never right for the job.
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Quick answer
Replacing a tankless unit with an IBC SFT Superflow in New Westminster typically makes sense once a converted mechanical space keeps causing combustion air or access problems, or once a single unit can no longer keep up with a main house and secondary suite sharing hot water demand. The process runs through an on-site assessment, a City of New Westminster gas permit, and an install that corrects space and venting issues the original setup may have carried for years.
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New Westminster's older character housing stock means a lot of tankless installs live in retrofitted spaces, converted crawlspaces, or shared mechanical closets that were never purpose-built for the appliance. When repeated repairs trace back to the space itself, such as inadequate combustion air or a condensate line that can't drain properly below grade, a replacement is the point to fix the setup rather than the unit.
The other common driver is legal secondary suites, which are common across this city; a unit sized for a single household years ago is frequently asked to do more than it was designed for once a basement suite is added.
A replacement is the natural opportunity to correct combustion air supply in a tight mechanical closet, whether that means direct outside air ducting or a properly sized louvred door, since a marginal setup that's caused recurring faults on the old unit will cause the same problems on a new one if it isn't addressed. Where the unit sits below the level of a floor drain, a condensate pump gets specified as part of the replacement rather than relying on gravity.
If the unit serves both a main suite and a secondary suite, sizing for combined peak demand, rather than assuming the old unit's capacity was ever adequate, is part of the assessment.
| Item | What happens during replacement |
|---|---|
| Combustion air | Corrected in tight or converted mechanical spaces to meet current requirements |
| Condensate drain | Pumped if the unit sits below grade or below the nearest floor drain |
| Venting | Replaced with condensing-rated PVC or polypropylene, routed for the specific space |
| Sizing | Reassessed for combined main house and suite demand where applicable |
A tankless water heater replacement is gas-permitted work through the City of New Westminster, filed by the licensed contractor before work begins, with an inspection once the install is complete. On older character homes, the permit review often puts extra attention on combustion air and venting clearances in converted spaces, since these are common gaps in decades-old retrofits.
CANRO manages the permit filing and inspection scheduling as part of the replacement.
A tankless install runs $3,500–$7,500 as a 2026 public-market ballpark, not a quote, with the number shaped by how much combustion air, venting, or condensate work the specific mechanical space needs. A $90–$150 service call applies if the visit starts as a diagnostic before the decision to replace is made.
CANRO doesn't promise a fixed completion date, since permit processing and the scope of work in an older home's mechanical space vary; a realistic estimate is included in the written quote.
Safety note
Combustion air, venting, and gas line work during a replacement must be done by a Technical Safety BC licensed gas fitter; CANRO holds gas licence LGA0043870. If you smell gas at any time, leave the home and call FortisBC at 1-800-663-9911.
Sometimes, but if that closet has caused combustion air problems in the past, the assessment usually recommends correcting the air supply, whether through outside air ducting or a different door, rather than repeating the same setup.
Yes, a gas permit through the City of New Westminster is required regardless of whether the replacement unit is the same model or different, and it's filed by the licensed contractor.
It looks at combined peak demand from both the main house and the suite, since sizing for one household when two are actually using the system is a common reason for chronic weak flow.
It depends on whether the unit sits below the level of the nearest floor drain, which is common in below-grade suite installs on this city's sloped terrain, and gets confirmed during the assessment.
It varies with how much combustion air and venting correction the specific mechanical space needs, so CANRO gives a realistic estimate at the quote stage rather than a fixed promise.
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