How hydronic and in-floor radiant heating works in Heritage Mountain, Port Moody's hillside homes, including zoning across split levels.
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In Heritage Mountain, hydronic heating is often found as in-floor radiant in basement or lower-level living space, run off a gas-fired boiler, frequently zoned separately from upper floors to account for the split-level and multi-storey layouts common in this hillside subdivision.
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Heritage Mountain's homes, built mostly through the 1980s and 90s on sloped terrain, often have walkout basements or split-level layouts where a lower level sits partly below grade. In-floor radiant heat run from a gas boiler is a natural fit for these lower levels — it doesn't rely on warm air rising the way some forced-air setups do, and it keeps a below-grade slab from feeling cold underfoot, which matters more in a walkout basement than in a fully above-grade room.
Some homes in this neighbourhood run hydronic heat throughout, with radiant floors on the lower level and baseboard or panel radiators upstairs; others use hydronic only for the lower level and forced air for the rest of the house, split by original builder choice or later renovation.
Because these homes often step down the slope across several levels, zoning matters more here than in a single-storey flat-lot house. Each level, and sometimes each wing of a level, benefits from its own zone valve and thermostat, since solar exposure and how much of the level is below grade both affect how much heat that space actually needs relative to the rest of the house.
Homes from this construction era generally have better insulation than the century-old character homes found closer to central Vancouver, but they weren't built to today's high-efficiency standards either. Pairing a modern condensing boiler with the existing radiant loops or radiators is one of the more cost-effective upgrades available, since it improves efficiency without touching the distribution system already embedded in the floors.
| Boiler Type | Efficiency Behaviour | Fit for This Housing Stock |
|---|---|---|
| Standard atmospheric | Fixed, lower efficiency | Common in original 1980s-90s installs |
| Condensing (modulating) | Higher efficiency, especially on milder days | Good upgrade path, reuses existing loops |
A new boiler installation serving existing radiant zones typically runs $6,500 to $14,000 or more in this region — a ballpark, not a quote — with the range depending on boiler size and how many zones are being served. If you're finishing a previously unfinished lower level and adding radiant heat for the first time, expect the project to be planned alongside the renovation rather than as a standalone mechanical job, since the tubing needs to go in before flooring.
Confirm current FortisBC or CleanBC program eligibility before budgeting for any rebate, since programs and amounts change and shouldn't be assumed to still apply as they did previously.
Safety note
Any work on gas piping, the burner, the venting, or the combustion chamber must be done by a Technical Safety BC licensed gas fitter. If you ever smell gas (a rotten-egg odour) or suspect a carbon monoxide problem, leave the home immediately and call FortisBC's emergency line at 1-800-663-9911 from a safe location before calling anyone else.
Yes, it's one of the more common choices for below-grade or walkout levels in this neighbourhood, since it avoids the cold-floor feeling that below-grade spaces can otherwise have.
Multi-level hillside homes have different heat loss and solar exposure by level, so a single zone often over- or under-heats part of the house. Separate zoning lets each level be controlled to its own actual need.
In most cases yes. A new high-efficiency boiler can typically be connected to existing radiant loops or radiators without redoing the distribution system, provided it's sized correctly for the connected load.
It depends on the scope of the broader renovation, since the tubing has to be installed before flooring goes down. It's best planned together with the renovation timeline rather than scheduled separately.
No, hydronic heating doesn't provide cooling on its own. Homes wanting air conditioning need a separate cooling system alongside the hydronic heat.
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