Arbutus Ridge character homes often need a gas line upsized from a decades-old original run before a tankless water heater can be installed properly.
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In an Arbutus Ridge character home, installing a natural gas tankless water heater usually starts with checking the original gas piping, which in many 1930s-through-1960s houses was sized for a smaller set of appliances than a modern household uses, and often needs upsizing from a half-inch line to support a tankless unit's higher instantaneous draw. Venting also needs a clear route, sometimes through or near an old masonry chimney chase that's no longer used for its original purpose.
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Arbutus Ridge's character homes were mostly built well before natural gas tankless units existed, and their original gas piping was sized for whatever combination of a furnace or boiler, a range, and maybe a gas fireplace the house had at the time. Tankless water heaters draw considerably more gas volume in the moment than a standard tank heater, so it's common for us to find that the existing line needs to be upsized from the original half-inch pipe to a larger diameter, particularly if the run to the mechanical room is long or has several fittings and direction changes.
This isn't unique to tankless installs, older Vancouver homes often need gas line assessment for other upgrades too, but it's a step worth planning for financially and in terms of timeline rather than discovering partway through a project.
Some Arbutus Ridge homes still have an original masonry chimney that once vented a wood or oil appliance and is no longer in active use, and while a tankless unit's venting requirements are different from what that chimney was designed for, the chimney chase space is sometimes usable as a routing path for new venting with the correct liner and clearances. Where that's not practical, we route venting through an exterior wall instead, choosing a location that respects clearances from windows, doors, and neighbouring property lines that can be tighter on these established, closely spaced lots.
| Situation | Common Approach | Note |
|---|---|---|
| Original half-inch gas line | Upsize to larger diameter | Check total appliance load on same meter |
| Unused masonry chimney chase | Possible routing path with correct liner | Assess structural condition first |
| No usable chimney chase | Route through exterior wall | Confirm clearances given lot spacing |
| Existing mixed radiant/radiator heat | Separate from domestic hot water | Tankless typically independent system |
Because gas line upsizing and venting routing through an older structure both add labour beyond a straightforward like-for-like swap, we walk homeowners through what the specific home needs before quoting. Installation for a tankless conversion in an Arbutus Ridge character home typically runs in a ballpark of $3,500 to $7,500, and that is a ballpark, not a quote, since gas line and venting work in older construction varies more than in newer housing stock.
If you're planning a kitchen renovation or other project that will already open up walls near the mechanical room, it's often more efficient to coordinate the gas line and venting work for a tankless conversion at the same time.
Safety note
If you ever smell gas, hear hissing near the boiler or water heater, or notice soot, a yellow burner flame, or a headachy, stale feeling near the mechanical room, leave the house and call FortisBC at 1-800-663-9911 from somewhere safe before doing anything else. Gas piping, venting, and combustion appliances must only be serviced or altered by a Technical Safety BC licensed gas fitter.
Often yes. Many original lines were sized decades ago for fewer appliances than a modern household runs, and tankless units need more instantaneous gas flow than a tank heater.
Sometimes, if the chimney chase is structurally sound and can be fitted with the correct liner, but this needs to be assessed case by case rather than assumed.
Established Arbutus Ridge lots are often closely spaced, so exterior vent placement needs to respect clearances from windows, doors, and neighbouring property lines carefully.
It can be more efficient timing-wise if walls near the mechanical room are already open, though total cost still depends on the specific gas and venting work required.
No, domestic hot water is typically a separate system from space heating, so a tankless water heater installation doesn't change how your existing heating zones work.
A straightforward swap can often be completed in a day, but projects requiring gas line upsizing or new venting routing through older construction may take longer.
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