Boiler Replacement Calgary — Honest Repair-or-Replace Advice

It depends on the unit tier, the output your home actually needs, and what's already in your mechanical room — and we won't quote it over the phone, because a sight-unseen number is one that changes on install day.

The variables that move it most: the boiler itself, whether the existing gas line and venting can be re-used or need replacing, how much near-boiler piping has to be rebuilt, whether the system needs a power flush, and how difficult the old unit is to physically remove.

We come out, assess the whole system, and give you the model, the efficiency rating, the full scope and the all-in price in writing at no charge. Financeit monthly payments are available if you'd rather spread it out.

The short framework we use on site:

Under about 12 years with one failed part — repair it. The boiler has years left.

Between 12 and 18 years — it depends what failed. A minor part is worth fixing; a heat exchanger usually isn't.

Over 18-20 years with a major failure — replace. You'd be putting an expensive component into a system where every other original part is the same age.

A cracked heat exchanger at any age — replace. That's a safety issue, not a cost calculation.

We'll assess it on site at no charge and tell you honestly which side of the line you're on. If a repair is the right answer, that's what we'll quote.

A straight swap — new unit onto compatible existing gas line, venting and piping — is typically a single day, and you'll have heat that evening.

Add a new sidewall vent, a gas line upgrade, or a near-boiler piping rebuild and it becomes one to two days. Replacing a heavy cast-iron unit that has to be broken down to get it out of the basement can add time on its own.

We give you a realistic timeline with the written estimate, and if the job needs to span two days we plan the heat-off window rather than leaving you guessing.

Usually yes, but it needs checking rather than assuming — this is the most commonly skipped step in a boiler replacement.

A condensing boiler only hits its advertised efficiency when the water returning from your system is cool enough to condense the flue gases. Older radiator systems were designed to run hot. If your radiators are undersized for a lower operating temperature, the boiler simply never condenses, and you've paid for efficiency you'll never see.

We check radiator sizing against your home's heat loss, set the outdoor reset curve to run the system as cool as it can while still heating properly, and tell you if upsizing a radiator or two would materially change the result. Old iron systems also need a power flush and a magnetic filter first — sludge from decades of steel and iron will block a modern heat exchanger.

Often, yes — and it's the variable that surprises people most.

Older Calgary boilers were commonly vented into a masonry chimney. Condensing boilers can't use one: their exhaust is cool and acidic, and it needs sealed plastic venting, usually through a new sidewall penetration.

There's a knock-on effect worth knowing about. If your boiler and your hot water tank shared that chimney, removing the boiler can leave the water heater orphaned on a flue that no longer drafts properly. We look at both appliances together at quote stage so the venting plan covers the whole mechanical room, not just the new boiler.

If it's past 18 years, getting an assessment is worth doing even if you're not ready to replace.

A planned replacement in spring or early fall is a better job than an emergency one in January — you compare quotes, choose the unit rather than taking what's in stock, and nobody is working around a freezing house. Emergency replacement is a service we provide, but it costs more and narrows your options.

That said, we won't tell you to replace a boiler that's running well just because of its birthday. Age alone isn't a reason. Age plus rising gas bills, plus repairs starting to cluster, is.

We drain it, disconnect it, remove it from the property and dispose of it. That's included in the replacement scope — you're not left with an old unit in the basement or a disposal bill afterwards.

On heavy cast-iron boilers in older Calgary homes, removal occasionally means breaking the unit down in place to get it up the stairs. We assess that at quote time so it's priced in rather than raised as a surprise on the day.

Rarely, and we'd usually talk you out of it.

If your home already has radiators, baseboards or in-floor loops, that distribution system is an asset. Converting to forced air means installing ductwork throughout a finished house — a major renovation, far beyond the cost of a boiler replacement, and you'd be giving up the even, quiet heat that hydronic systems deliver.

The conversation is different if you're gutting the house anyway, or if you want central air and are weighing a heat pump or furnace as part of a larger project. Short of that, replacing the boiler and keeping the hydronics is almost always the better value.