Burnham's cast-iron sectional boilers favour durability and simple servicing, while HTP's condensing lineup targets higher efficiency in a smaller footprint, and the right pick depends on your existing venting and system age.
Tell us what you need—we’ll call you back fast.
Quick answer
Burnham is a long-established North American manufacturer of cast-iron sectional boilers, generally valued for durability and straightforward field servicing over many years, especially in homes with a sound existing chimney. HTP is a well-established manufacturer of compact, wall-hung condensing boilers with a strong North American service and parts network. A home with an aging masonry chimney and simple baseboard heating may be well served by a Burnham-style replacement, while a home aiming for higher efficiency and a smaller mechanical room footprint often points toward an HTP condensing unit.
Need a licensed gas fitter for your gas boiler? Call CANRO at (604) 359-1081 — residential natural-gas heating and hot water across Metro Vancouver since 1999.
Burnham's cast-iron sectional design has stayed popular for decades in part because it tolerates a wide range of system conditions — older piping, some sediment, and less-than-ideal water treatment — without the same sensitivity a modern condensing heat exchanger has. It's also relatively straightforward for an experienced technician to service, since the basic sectional cast-iron design hasn't changed dramatically over time.
HTP's condensing boilers, by comparison, are lighter, more compact, and generally more efficient, but they extract that extra efficiency by condensing flue gases, which calls for cleaner system water and closer attention to sizing and return water temperature to actually achieve the efficiency gains in practice.
Homeowners weighing this decision often find it easier to think in terms of what they're trying to solve — a simple, dependable replacement versus a genuine efficiency and space upgrade — rather than treating it as a straightforward brand comparison, since the two products serve fairly different goals.
For homes in older parts of Vancouver, Burnaby, and New Westminster still using a masonry chimney for boiler venting, the chimney's condition is often the deciding factor. If it's sound and appropriately sized, a Burnham-style cast-iron replacement can reuse that venting path with a straightforward inspection. If the chimney needs relining, is oversized for a smaller modern appliance, or shows signs of deterioration from decades of BC's damp climate, switching to a sealed-combustion HTP condensing unit with new sidewall or roof venting sidesteps the chimney issue entirely.
This decision should always follow a proper combustion safety and venting inspection by a licensed gas fitter rather than a visual guess at chimney condition.
An older cast-iron system that's accumulated years of sediment and mineral buildup can sometimes be safely kept in service with a Burnham-style replacement, since the design tolerates that kind of imperfection better. Converting the same system to an HTP condensing unit generally benefits from a thorough flush beforehand, and ongoing attention to system water quality afterward, to protect the more sensitive heat exchanger and maintain efficiency over time.
Neither approach eliminates the need for regular maintenance — annual servicing, checking combustion, and inspecting venting are recommended for either brand.
| Consideration | Burnham (cast-iron) | HTP (condensing) |
|---|---|---|
| Footprint | Floor-standing, larger | Wall-hung, compact |
| Efficiency ceiling | Lower, non-condensing | Higher, condensing |
| Tolerance for old system water | Higher | Lower, benefits from a flush |
| Venting | Often existing chimney | Sealed combustion, sidewall/roof |
If your existing chimney is sound and your priority is a straightforward, durable replacement without a lot of ancillary work, Burnham's cast-iron line remains a solid, proven choice. If you're aiming to improve efficiency, free up mechanical room floor space, or your chimney needs significant work anyway, HTP's condensing lineup is generally the more forward-looking option.
A straightforward cast-iron replacement often sits toward the lower to middle of the $7,500 to $15,000+ boiler replacement ballpark for Metro Vancouver, while a condensing conversion with new venting can move toward the higher end — confirmed only after an on-site assessment.
Whichever direction you go, ask your contractor to set expectations for ongoing care up front: a cast-iron system should still get an annual combustion check even though it tolerates imperfect conditions better, while a new condensing unit needs its condensate drain, venting termination, and heat exchanger checked yearly to protect the efficiency gains you're paying extra for. Treating either boiler as maintenance-free is the most common way homeowners shorten its useful life.
Safety note
Boiler installation, chimney assessment, and any venting conversion must be done by a Technical Safety BC licensed gas fitter — CANRO holds gas licence LGA0043870 and boiler licence LBP0046450. If you detect a gas odour, leave the home and call FortisBC at 1-800-663-9911.
Often it takes up less floor space since it's wall-hung rather than floor-standing, but venting will typically need to change from the existing chimney to a new sidewall or roof vent, which your installer should plan for.
It's generally recommended, especially in an older cast-iron system, since sediment and mineral buildup can affect a more sensitive condensing heat exchanger more than a traditional cast-iron design.
Yes, for the right situation — particularly homes with a sound existing chimney and simpler distribution systems where maximum efficiency isn't the top priority and rugged, field-serviceable equipment is valued.
A licensed gas fitter should perform a combustion safety and venting inspection specific to whichever boiler you're considering, checking draft, lining condition, and code compliance.
A properly sized condensing boiler generally has a higher efficiency ceiling than a non-condensing cast-iron unit, but real-world savings depend on your specific system, usage patterns, and gas rates, so avoid relying on generic percentage claims.
Family-run, TSBC-licensed (gas LGA0043870 · boiler LBP0046450), serving Metro Vancouver homes since 1999. Residential, natural gas only.
Call (604) 359-1081 Email info@canroheat.ca“Canro does an amazing job! Super professional and skilled with everything—boilers, furnaces, and AC. Always a pleasure working with them!”
“Five stars for Canro. We needed a replacement of a 30-year-old boiler. A new high-efficiency unit was installed—clean, professional work.”
“I can’t speak highly enough about George, who was recommended for a boiler service call for my parents’ home. George is excellent.”
25+ years keeping Metro Vancouver homes comfortable. Honest advice, upfront pricing, work that lasts.