NTI offers a modern Canadian-made condensing lineup well suited to newer installations, while Burnham's cast-iron boilers have a long service history in older Metro Vancouver homes with existing radiators, so home age often decides the comparison.
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NTI is a Canadian manufacturer commonly chosen for both new construction and boiler replacement projects across the Lower Mainland, offering a range that spans compact combi units to larger space-heating-only models. Burnham is a legacy North American boiler manufacturer, with cast-iron atmospheric models still common in older Vancouver character homes running cast-iron radiators, alongside newer condensing lines the company has added more recently. The decision typically comes down to whether you're replacing an aging cast-iron system in an established home or planning a modern installation.
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NTI's range spans compact combi units to larger space-heating-only condensing models, generally positioned around modern efficiency standards rather than legacy cast-iron construction.
Burnham's cast-iron boilers have a long service history in older Lower Mainland homes, particularly those with original cast-iron radiators, and the company has added condensing models to its lineup as efficiency standards have evolved.
A home with existing cast-iron radiators generally needs a boiler compatible with the higher water volume and temperature those radiators were designed around, an area where Burnham's decades of experience with exactly this system type is directly relevant.
A newer home, or an older home undergoing a full heating system conversion to baseboard or radiant distribution, may be better suited to NTI's modern condensing lineup, sized appropriately by a licensed technician for the new distribution system.
| Factor | NTI | Burnham |
|---|---|---|
| Typical home fit | New construction, modern renovations | Older homes with cast-iron radiators |
| Format | Combi and standalone condensing options | Cast-iron atmospheric and newer condensing lines |
| Origin | Canadian manufacturer | Legacy North American manufacturer |
| Venting | Sidewall, condensing-appropriate | Chimney for legacy models, sidewall for condensing |
| Best fit | Modern systems, direct Canadian supply chain | Preserving an existing cast-iron radiator system |
A home in Tsawwassen with an aging cast-iron boiler and original radiators is a reasonable candidate for a straightforward Burnham replacement that keeps the existing radiator loop intact and minimizes disruption.
If the home is instead undergoing a full mechanical renovation with new baseboard or radiant distribution, NTI's modern condensing lineup, sized for the new system, may be the more efficient long-term choice.
Before committing to either path, it's worth having a technician confirm the actual condition of the existing radiators and piping, not just the boiler, since aging piping or radiators in poor condition can undercut the benefit of installing a brand-new boiler on either side of this comparison.
Legacy Burnham atmospheric boilers can sometimes continue using an existing masonry chimney if it's inspected and found suitable, while NTI's condensing models and Burnham's own condensing lines both require dedicated sidewall venting instead.
Gas line sizing should be reassessed whenever a boiler is replaced, since older homes sometimes have gas piping sized for equipment that predates current input rating standards.
Homeowners should also ask whether the existing gas meter and regulator are adequate for the replacement unit's input rating, since older homes occasionally need a meter upgrade coordinated with the gas utility before the new boiler can be commissioned.
Burnham's long history means technicians who specialize in older Lower Mainland homes are generally comfortable sourcing parts and servicing legacy cast-iron units, while NTI's Canadian manufacturing base supports steady parts availability for its modern lineup.
A straightforward cast-iron replacement can cost less than a full condensing conversion with new venting; overall boiler installation and replacement projects generally run $6,500 to $15,000-plus as a ballpark, not a quote.
Cast-iron Burnham boilers need an annual combustion check and visual inspection of the heat exchanger sections for cracking, along with a chimney condition check where applicable, while NTI's condensing models need combustion analysis and condensate drain checks.
For an aging cast-iron boiler with a documented history of reliable service, a technician can help you weigh continued repairs against the cost and disruption of a full system conversion, especially if the connected radiators are still in good condition.
Whichever direction the assessment points, getting the recommendation in writing along with the reasoning behind it gives you something concrete to compare against a second opinion if you want one before committing to the larger of the two project scopes.
Safety note
If you ever smell gas near a boiler, hear it hissing, or a carbon monoxide alarm sounds, leave the home immediately and call FortisBC at 1-800-663-9911 from outside before doing anything else. Any gas boiler work, including swapping brands, must be done by a Technical Safety BC licensed gas fitter.
It's possible in some cases, but cast-iron radiator systems typically need higher water volume and temperature than many condensing models are optimized for, so a technician needs to verify compatibility.
Burnham continues to offer cast-iron style products alongside newer condensing lines, though specific model availability changes over time and should be confirmed with a supplier.
Often yes, since keeping the existing venting and radiator system intact generally avoids the added cost of a full venting conversion.
A licensed technician can inspect the radiators and piping for leaks, corrosion, or blockages as part of a full system assessment before recommending a boiler.
NTI's modern condensing lineup can suit a full conversion well, provided the new distribution system, such as baseboard or radiant, is properly sized by a licensed technician.
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