What a Navien gas boiler installation looks like for a coastal Tsawwassen home, including venting, permits, and the salt-air factor.
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Quick answer
Tsawwassen's mostly flat, coastal lots and mix of older bungalows and newer infill homes both suit a Navien condensing boiler for hydronic heat, but the marine air here means extra attention to vent termination hardware and exterior condensate lines. A licensed install includes a heat loss based sizing, a Corporation of Delta mechanical permit, and a commissioning check — the brand is only one piece of a correct installation.
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Tsawwassen has a distinct mix: older single-level bungalows from the 1960s and 70s near the village core, and larger newer homes built closer to the ferry terminal and Boundary Bay. The older homes often still run baseboard hot-water heat off a standalone boiler, sometimes original to the house. Swapping that for a Navien condensing unit usually means the same distribution piping stays, but the boiler itself, the venting, and the controls all change.
Because Tsawwassen sits right on the water, we pay closer attention here than we would inland to the materials used for exterior vent terminations and condensate discharge points. Salt-laden air accelerates corrosion on unprotected metal fittings, so venting components and any exposed brackets get chosen with that exposure in mind.
A Corporation of Delta mechanical permit applies to boiler installation and replacement, and the completed work is inspected. That inspection is the independent check that venting clearances, gas sizing, and safety devices were done to code — not a formality to skip.
| Scenario | Rough ballpark | Main cost drivers |
|---|---|---|
| New boiler install | $6,500–$14,000+ | Output size, venting run length, number of zones |
| Boiler replacement | $7,500–$15,000+ | Age/condition of existing piping, code upgrades, access |
These are ballparks, not quotes. A Tsawwassen job with a straightforward exterior-wall vent run tends to land toward the lower end; one where the mechanical room is landlocked and needs a longer vent chase costs more.
We won't hand you a specific AFUE percentage or BTU output here — those figures live on the unit's rating plate and in Navien's documentation for the exact model proposed, and they should be verified against that paperwork rather than quoted from memory. What we can tell you is that correct sizing depends on your home's heat loss, insulation, and window exposure, not square footage alone. An oversized combi boiler cycles more than it should; an undersized one falls behind during a January cold snap.
Annual service on a condensing boiler covers combustion performance, condensate trap and neutralizer cleaning, and a visual check of venting for salt corrosion or debris — gulls and coastal debris do occasionally find their way near exterior terminations here. Catching a corroded vent cap or a clogged condensate trap during a scheduled visit is a lot cheaper than dealing with a shutdown mid-winter.
If your existing boiler needs a repair, we look at whether it's a contained issue like a circulator or control board versus something systemic like a leaking heat exchanger. Age, parts availability, and repair cost relative to a replacement all factor into that recommendation.
Safety note
If you ever smell gas, hear an unusual hissing near the appliance, or suspect a venting problem, leave the home and call FortisBC at 1-800-663-9911 from outside before doing anything else. Gas boiler and gas water heater work in BC must be performed by a Technical Safety BC licensed gas fitter; CANRO holds gas licence LGA0043870 and boiler licence LBP0046450.
It affects material choices more than the core installation steps — we use corrosion-resistant fittings for exterior vent terminations and condensate discharge points because salt air speeds up corrosion on unprotected metal.
Yes, a mechanical permit through the Corporation of Delta is required for gas boiler installation and replacement, and the work is inspected once complete.
Often yes — the existing distribution piping and baseboards can typically stay, with the boiler, venting, and controls being what changes. We confirm the zone layout and piping condition during the assessment.
Annually, at minimum, covering combustion analysis, condensate trap and neutralizer cleaning, and a check of venting and safety controls.
Roughly $7,500 to $15,000 or more as a ballpark, not a quote — the exact number depends on unit size, venting complexity, and any code upgrades the existing system needs.
We weigh the repair cost against the unit's age and the nature of the fault. An isolated part failure is usually worth repairing; a cracked heat exchanger or a unit near the end of its practical service life points toward replacement.
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