NTI and Triangle Tube both build stainless fire-tube condensing boilers aimed at hydronic heating, so the choice between them usually comes down to distribution history and radiant system pairing rather than a fundamental design gap.
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Both NTI and Triangle Tube are hydronic-heating specialists that build stainless steel fire-tube condensing boilers, so on paper they solve the same problem for a Metro Vancouver home. The practical differences tend to show up in which wholesalers stock each brand's parts locally, how each pairs with radiant floor manifolds and cast-iron radiator loops, and which one your installer has more field hours on. Either can be a sound choice for a hydronic retrofit; the deciding factor is usually your installer's familiarity and the specific distribution needs of your heating loop.
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NTI and Triangle Tube both come from the hydronic side of the industry rather than from tankless water heaters or forced-air furnaces, and both centre their residential line on a stainless steel fire-tube heat exchanger designed to condense efficiently across a range of firing rates.
Because they share that basic architecture, the day-to-day experience of living with either boiler is similar: quiet modulation, a compact footprint compared to older cast-iron units, and compatibility with radiant floor loops, baseboard runs, and cast-iron radiators alike.
Triangle Tube's residential line has a long-standing reputation in radiant and hydronic circles across North America, and many hydronic designers in this region have specified it for years in higher-end radiant floor systems.
NTI, being Canadian, has historically had strong distribution through hydronic wholesalers serving Ontario and Quebec, with a growing but sometimes thinner presence on the West Coast depending on the wholesaler your installer buys from.
Neither gap is disqualifying — both brands are actively sold and serviced in Metro Vancouver — but it's worth asking your installer which one they stock parts for locally, since that affects how quickly a warranty or out-of-warranty repair can be completed.
A common scenario in Vancouver's character housing stock is a home built with cast-iron radiators fed by an aging, oversized boiler. Both NTI and Triangle Tube fire-tube models can usually be sized down significantly from the original boiler while still heating the same radiator loop, because modern condensing units are far more efficient at partial load than the boilers they replace.
The retrofit challenge is rarely the boiler itself; it's usually the venting path. A masonry chimney that served the old atmospheric boiler is no longer suitable for a condensing unit, so the installer needs a clear route for new PVC or polypropylene venting to an exterior wall or roof, which can be tighter to route in a century-old house with finished basements.
| Factor | NTI | Triangle Tube |
|---|---|---|
| Heat exchanger | Stainless steel fire-tube | Stainless steel fire-tube |
| Best fit | Hydronic retrofits, radiant, baseboard loops | Radiant floor systems, higher-end hydronic designs |
| Regional distribution | Strong in Eastern Canada, growing in BC | Long-standing North American hydronic reputation |
| Venting | Horizontal PVC/polypropylene | Horizontal PVC/polypropylene |
Because both are condensing designs, annual maintenance on either brand covers the same ground: checking combustion, inspecting the condensate trap and neutralizer, confirming the vent terminal is clear, and verifying the circulator and expansion tank are functioning correctly.
Our wet coastal winters mean condensate drains see heavy use for months at a stretch, so ask your technician to specifically check that the trap hasn't dried out or clogged during your annual service, regardless of which brand you own.
When a fire-tube heat exchanger does eventually fail on either brand, replacement of the exchanger itself is usually not economical relative to replacing the whole unit, particularly once the boiler is well past the age most units of its type are expected to serve.
Safety note
A gas odour, soot near a vent terminal, or a sudden headache near the mechanical room are reasons to get everyone out of the house and call FortisBC at 1-800-663-9911 right away. Any work on a gas boiler's burner, gas line, or venting must be done by a Technical Safety BC licensed gas fitter.
Triangle Tube has a longer track record in radiant-focused installations in North America, but NTI units are also commonly paired with radiant loops. The better fit often depends on which brand your hydronic designer has the most field experience with.
Yes, both can be piped into an existing cast-iron radiator loop. A technician needs to check the loop's water volume and flow requirements to size the new boiler correctly rather than simply matching the old boiler's output.
This varies by which hydronic wholesaler your installer uses. Ask directly which brand they stock parts for locally, since that affects how quickly a repair can be completed if something needs replacing.
You won't use the old masonry chimney for combustion venting anymore, since both are condensing units vented horizontally through plastic pipe. The chimney can often stay in place unused or be capped, depending on the rest of the home's needs.
As a ballpark, not a quote, gas boiler replacement in this region commonly runs $7,500 to $15,000 or more, depending on venting length, distribution changes, and site access.
Manufacturers set their own expected service life and warranty terms, so check the certificate for your specific model. Regular annual maintenance is the biggest factor within your control for reaching the upper end of that range.
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