Last updated: July 2026
Boiler Replacement & Installation Calgary
High-efficiency combi-boiler and hot water boiler replacement by certified technicians. Whether your system is 15 years old or broken down, we'll spec and install the right boiler for your Calgary home.
Is Your Boiler Past Its Best?
Boilers typically last 15–25 years with proper maintenance. When repair costs approach 50% of replacement cost, or when your system is consistently unreliable during Calgary winters, replacement is usually the smarter financial decision. A modern high-efficiency boiler can cut your heating costs by 15–30% versus a unit installed before 2010.
We assess your home's heat load, existing distribution system (radiators, baseboard, in-floor), and hot water demand to recommend the right capacity and type — not just the most expensive option on the market.
- Boiler age over 15 years — efficiency likely below 80%
- Frequent breakdowns or pilot light issues
- Uneven heating across your home
- Rising gas bills without explanation
What Is a Boiler Service & How Does It Work?
Boilers are an important part of the central heating system. Simply put, boilers heat water in order to generate steam. This steam can be used to heat living spaces, and for humidification, sterilization, and power generation. When it's cold outside, you turn on the boiler with an electric switch to open a valve that allows gas to enter a sealed combustion chamber in the boiler, and then an electric ignition system sets the gas alight. The gas jets then enter a heat exchanger attached to a pipe carrying room-temperature water, and the heat exchanger heats up the water.
Today's boilers run on gas, oil, or electricity, and use radiant heat to warm a room. Other features to look for in a boiler are whether it's a condensing vs. non-condensing boiler, or a sealed combustion vs. non-sealed combustion system. Additional factors to consider are the climate where you live, the size of boiler you'll need, and its efficiency rating.
Boiler or Furnace — Which Is Best?
Furnaces distribute heat through a duct system and release warm air into rooms through vents or registers on walls, floors, or ceilings. They're fueled by electricity, natural gas, propane, or oil, and are more common in newer homes — whereas boilers are usually found in older structures. Furnaces blow conditioned air, which can create a drafty feeling. Radiant heat from a boiler, on the other hand, dispenses a comfortable, quiet heat at steady temperatures. A boiler costs more upfront than a furnace, but many homeowners feel the extra comfort is worth it. Both systems require annual maintenance to keep manufacturer warranties valid.
Boiler Options for Calgary Homes
Combi-Boiler (Combination)
A combi-boiler supplies both space heating and domestic hot water from a single unit — no separate hot water tank required. Ideal for homes with limited mechanical room space or those wanting to simplify their mechanical system.
- Eliminates the separate hot water tank
- Compact footprint — great for condos and townhomes
- On-demand hot water — no standby heat loss
- Efficiencies up to 95% AFUE on modern units
Note: high simultaneous hot water demand can cause heating lag. Best suited for 1–2 bathrooms and smaller households.
System Boiler (Separate Tank)
A system boiler heats only the distribution system (radiators, baseboard, in-floor). It works alongside a separate hot water storage cylinder for domestic use. Better for homes with high hot water demand or complex distribution systems.
- No limit on simultaneous hot water draw
- Better suited for larger homes with 3+ bathrooms
- Proven reliability in Alberta's cold climate
- Compatible with in-floor radiant and baseboard systems
Note: requires space for a hot water storage cylinder. Higher upfront cost but better capacity for large families.
Brands We Install
Common Boiler Issues We Repair in Calgary
Not sure whether it's time to repair or replace? Here are the most common boiler issues we see in Calgary homes, and the parts our technicians typically repair or replace to fix them.
No Heat or Hot Water
Thermocouple, diverter valve, airlock, diaphragm
Leaking or Dripping
Pressure valve, pump seal, internal pipework
Strange Noises (Banging, Whistling, Gurgling)
Pump, heat exchanger, air traps
Low Boiler Pressure
Pressure relief valve, expansion vessel
Pilot Light Goes Out
Thermocouple, gas valve, ignition system
Frozen Condensate Pipe
Condensate pipe, pipe insulation
Thermostat Issues
Thermostat, wiring, sensors
Radiators Not Heating Up
Radiator valves, airlocks, sludge removal
Kettling (Limescale Build-Up)
Heat exchanger, boiler pipes, water flow
Boiler Keeps Turning Off
Thermostat, pump, air vents, water pressure sensor
What a New Boiler Delivers
Lower Operating Costs
Modern condensing boilers achieve up to 95% AFUE versus 60–70% for pre-2000 units. That efficiency gap translates directly to your monthly gas bill — typically 15–30% lower.
Consistent, Even Heat
Radiant heating via a boiler system distributes warmth through water — delivering the most even, comfortable heat of any system. No forced-air drafts, no hot-and-cold spots.
Reliable Through Calgary Winters
A properly installed boiler with modern controls and a certified technician's commissioning is one of the most reliable heating systems available — well-suited to Calgary's extreme temperature range.
Why Choose Alberta Indoor Comfort for Boiler Services in Calgary?
Alberta Indoor Comfort specializes in boiler repair, maintenance, and installation to keep Calgary homes warm and efficient. If your boiler isn't heating properly, our licensed technicians perform a thorough inspection, diagnose the issue, and provide fast, reliable repairs. If your boiler is beyond repair, we offer expert boiler replacement and installation, ensuring you get the right energy-efficient system for your home.
- Expert Boiler Repair — quick and effective fixes for all boiler issues
- New Boiler Installation — high-efficiency models tailored to your home
- Licensed & Trained Specialists — up-to-date with the latest heating technology
- Reliable Service — guaranteed quality and customer satisfaction
We Specialize in Senior Accessibility
More homeowners are choosing to age in place instead of downsizing. Give us a call to find out more about how we help make your home's heating system — and the rest of your home — safer and more comfortable for elderly residents.
Free In-Home Boiler Assessment
We'll assess your existing system, calculate your home's heat load, and provide a written quote with options — including combi vs. system boiler and efficiency tier.
What Is Real Comfort & Safety?
Real comfort is going home from work in the winter and being in your most favorite, most comfortable clothing. Real comfort is taking a shower without worrying about running out of hot water. Real comfort and safety is getting great rest at home without worrying about your system breaking down. To some, real comfort is having total control of the temperature at home — heating or cooling — whenever you need it. Each of us has our own definition of comfort and safety, because we have different needs and wants. Different needs require different solutions.
Real comfort and safety from having total control of your home's temperature, heat and cool, whenever and wherever you need it.
Real comfort and safety from particulates, bacteria and viruses we don't see. Reducing health risk by creating healthier, cleaner air.
Real comfort and safety from reducing the cost of utilities, having more purchasing power for the important needs of the family.
Real comfort and safety can be shared with your family, loved ones, friends, and colleagues. Great news is always meant to be shared.
More studies show that cognitive function was shown to be up to 50% worse in environments with higher carbon dioxide concentration, which is a symptom of insufficient make-up air.
See a Navien Condensing Combi-Boiler in Action
Navien NCB-H Condensing Combi-boiler
Boiler Replacement Questions
Should I repair or replace my boiler?
If your boiler is under 12 years old and this is its first significant issue, repair usually makes sense. If it's over 15 years old, has had multiple issues in the past two years, or the repair estimate exceeds 40–50% of a new unit's cost, replacement is typically the better investment — especially given the efficiency gains from modern equipment.
Do you offer payment plans or financing for boiler replacement?
Yes. We offer financing options — including 6-month no-payment plans — so an unexpected boiler failure doesn't have to mean draining your savings. Ask about current financing options as part of your free assessment.
How long does a boiler replacement take?
A standard boiler replacement — swap out the existing unit with a same-type replacement — typically takes one full day. A combi-boiler conversion (adding or removing a hot water tank) or a capacity change may require two days. We provide a detailed scope before starting so there are no surprises.
Is a combi-boiler right for my Calgary home?
Combi-boilers work well for homes with 1–2 bathrooms and moderate hot water demand. They're particularly popular in Calgary condos and townhomes where space is limited. For larger families or homes with high simultaneous demand (multiple showers running at once), a system boiler with a separate hot water cylinder often performs better.
Are there rebates for boiler replacement in Alberta?
Alberta and certain utility providers offer efficiency rebates for high-efficiency heating equipment replacement. Eligibility depends on the AFUE rating of the new unit and the program's current funding status. We'll advise on current available programs as part of your free assessment — rebates can meaningfully offset replacement costs.
Get Boiler Answers Before You Decide
Talk to a certified Calgary boiler technician about repair vs. replace, financing, and rebate eligibility — no obligation.
Boiler Replacement Across Calgary & Area
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Our Recent Boiler Replacement Work in Calgary
Upgrade to a High-Efficiency Boiler
Professional combi and system boiler replacement across Calgary. Free in-home assessment, certified technicians, 6-month financing available.
