Boilers
Boiler Installation, Repair & Hydronic Heating in Ottawa
A Better Boiler Starts With the Whole Heating System
A boiler is only one part of a hydronic system. Reliable comfort depends on how the boiler is sized, piped, vented and controlled—and how well it works with the radiators, radiant floors, air handler and domestic hot-water demands already in the home.
AirZone HVAC Services installs, repairs and maintains residential boilers across Ottawa. Our team works with traditional radiator systems in neighbourhoods such as the Glebe and Westboro, modern in-floor heating, compact combi boilers and custom mechanical rooms for new homes.
Whether the priority is restoring heat today or designing a long-term replacement, we explain what the system needs and provide a clear path forward.
One AirZone team for the boiler, piping, controls and connected heating system.
Late summer and early fall are the best times to assess an aging boiler, correct comfort problems and complete planned work before Ottawa’s first sustained cold weather.
Ottawa Boiler Installation, Repair, Maintenance & Hydronic Heating
Boiler work is rarely a one-component decision. AirZone supports the equipment, piping, controls and heat-distribution system so homeowners do not have to coordinate several contractors to solve one comfort problem.
Boiler Installation & Replacement
We install high-efficiency heat-only and combi boilers for existing hydronic homes, renovations and new construction. The process can include heat-loss review, boiler sizing, venting, gas supply, condensate drainage, piping, pumps, zoning and controls.
Request a boiler installation quoteBoiler Repair & Diagnostics
Our technicians diagnose no-heat calls, leaks, pressure problems, ignition failures, repeated lockouts, circulation issues, failed pumps, zone-control problems and uneven radiators. We look for the cause before recommending parts.
Book boiler repair in OttawaAnnual Boiler Service
Professional maintenance can include combustion and safety checks, inspection of the venting and condensate system, cleaning required by the manufacturer, leak and pressure checks, verification of pumps and controls, and an operating test.
Schedule one-time maintenanceCustom Hydronic Heating
AirZone designs and services radiator, baseboard, radiant-floor, hydro-air, indirect domestic hot-water and snow-melt applications. We can also help reorganize a crowded mechanical room when compact wall-hung equipment creates a better layout.
Explore radiant floor heatingBoiler Repair in Ottawa: Diagnose the Whole System
A hydronic system connects the boiler to circulators, expansion control, valves, thermostats and heat emitters throughout the home. A pressure error at the boiler can start with a leak elsewhere. A cold room can result from trapped air, a zone valve, a circulator, a control setting or a balancing problem.
AirZone’s repair process starts with the whole system. We verify the fault, discuss repair options and explain when an aging component is part of a larger replacement decision.
Common reasons homeowners call us
- No heat or no hot water
- Cold radiators or uneven zones
- Low or fluctuating pressure
- Water around the boiler or piping
- Banging, gurgling or unusual noise
- Short cycling or repeated lockouts
- Error codes that keep returning
- Circulator or zone-control failures
Safety first: if a carbon-monoxide alarm activates, you smell gas or the system appears unsafe, leave the affected area and follow emergency guidance. Do not reset a fuel-burning appliance repeatedly without diagnosing the cause.
What Is Hydronic Heating, and Does a Boiler Boil Water?
Most residential boilers in Ottawa do not turn water into steam. They heat water and circulate it through a closed hydronic loop to radiators, baseboards, radiant-floor tubing or a compatible air handler.
The name “boiler” is historical and covers both hot-water and steam equipment. Older steam systems do exist, but the majority of modern residential boiler installations are hot-water systems. In a combi boiler, domestic water is heated through a separate waterway or heat exchanger; the water circulating through the home’s heating loop does not become the water used at a faucet.
Even Radiant Comfort
Hydronic systems move heat through water and release it gradually through radiators, baseboards or floors. Homeowners often notice fewer drafts and more consistent room temperatures than with high-velocity forced air.
Independent Heating Zones
Proper controls can divide a home into zones with different schedules and temperatures. Pumps, zone valves, emitters and control strategy must be designed to work together.
No Ductwork Required
Boilers are a natural fit for Ottawa homes already built around radiators or radiant floors. Cooling and ventilation still require a separate plan when the home has no ducts.
Quiet, No-Blower Heat
Radiators and floors deliver heat without supply-air noise or continuously moving household dust through ducts. The boiler and circulators still produce some mechanical sound and require proper service.
Put Your Boiler on an AirZone Family Plan
AirZone Family and Family+ memberships include annual maintenance for two eligible appliances, and an eligible natural-gas boiler can be one of them. This can be useful for a boiler home that also relies on an air conditioner, heat pump, furnace or other eligible comfort equipment.
- Annual maintenance for two eligible appliances
- Service reminders and priority non-emergency support
- Member discounts on eligible diagnostics and repairs
- Family+ adds eligible parts and labour protection
Eligibility, pre-inspection requirements, component coverage, exclusions and service conditions are governed by the current plan terms. Boiler drainage and refill and certain boiler components or services are not included. If a boiler is already broken, leaking or unsafe, diagnostic service is the correct first step.
Heat-Only Boiler, Combi Boiler or Hybrid Heating?
There is no universal “best boiler.” The right configuration depends on the home’s heat loss, emitter temperatures, number of zones, available utilities, mechanical-room space and domestic hot-water demand.
| System | What it handles | Often a good fit for | Important design question |
|---|---|---|---|
| Heat-Only Boiler | Space heating through radiators, baseboards, floors or a compatible air handler. | Homes with a separate water heater or an existing indirect tank strategy. | Can the boiler modulate low enough for mild weather and smaller zones? |
| Combi Boiler | Space heating plus on-demand domestic hot water in one wall-hung appliance. | Homes with limited space and a hot-water demand the selected unit can serve. | Will the flow rate and incoming winter water temperature support simultaneous use? |
| Boiler + Indirect Tank | Space heating plus stored domestic hot water heated by the boiler. | Larger households, multi-bath homes and periods of overlapping hot-water demand. | How should the tank, boiler priority and recovery rate be sized? |
| Boiler + Heat Pump | A heat pump can provide efficient heating in milder weather while the boiler supports hydronic loads or colder conditions. | Homes adding cooling or pursuing a carefully controlled dual-fuel approach. | How will the systems distribute heat, switch stages and avoid working against each other? |
A combi boiler is not automatically the right space-saving choice. If several showers, tubs and fixtures may run together, a heat-only boiler with an indirect tank can provide a stronger hot-water experience. AirZone compares peak demand before removing storage capacity.
Comparing a separate domestic hot-water system? Explore tankless water heaters.
What We Evaluate Before Replacing an Ottawa Boiler
Modern condensing boilers can recover heat that older equipment sends out through the vent. Natural Resources Canada reports that an ENERGY STAR certified gas boiler uses about 10% less energy on average than a standard model. The result in a particular home still depends on system design, water temperature, controls, building heat loss and operating habits.
A condensing boiler performs best when the return water is cool enough to promote condensation. That is why a low-temperature radiant floor can be an excellent match, while older high-temperature radiators may require a more careful design and outdoor-reset strategy.
- Room-by-room or whole-home heat loss
- Existing radiator and baseboard output
- Required supply and return temperatures
- Minimum firing rate and zone loads
- Gas, propane or electrical availability
- Venting and combustion-air route
- Condensate drainage and neutralization
- Domestic hot-water peak demand
- Pumps, valves, expansion and controls
- Water quality and system cleanliness
- Mechanical-room layout and clearances
- Future heat pump or renovation plans
Source: Natural Resources Canada residential boiler guidance.
How Much Does a New Boiler Cost in Ottawa?
A new residential gas boiler often falls within a general range of approximately $9,000 to $16,000 fully installed and warrantied. A straightforward replacement may stay within that range, while a custom hydronic redesign can be higher. The only responsible price is based on the actual home and scope.
Rebate programs change, and a standalone natural-gas boiler replacement does not automatically qualify. AirZone can identify any current program or whole-home financing path that applies to the proposed project. Check current Ottawa HVAC rebates.
Radiators, Radiant Floors, Hydro-Air & Snow-Melt Systems
Ottawa boiler systems range from cast-iron radiators in century homes to concealed floor tubing in new custom builds. AirZone can assess existing emitters, design new zones and coordinate the boiler with the way each space is intended to feel.
Radiant Floor Heating
Warm water circulates through tubing beneath the finished floor. Correct spacing, water temperature, floor covering, insulation and zoning determine comfort and response time. It can serve one bathroom, a basement or an entire home.
Learn about radiant floor heatingRadiators & Hydronic Baseboards
Existing radiators can often work with a new high-efficiency boiler, but their output at lower water temperatures must be checked. Oversized old radiators can be helpful; undersized emitters may require a different temperature or upgrade strategy.
Hydro-Air & Hybrid Systems
A boiler can supply a compatible air-handler coil, allowing hydronic heat to be delivered through ductwork. A separate heat pump can add cooling and shoulder-season heat when the controls and equipment are selected as one system.
See an AirZone boiler and heat pump projectSnow-Melt & Specialty Hydronics
Properly designed exterior hydronic tubing can reduce snow and ice accumulation on selected driveways, walks or entrances. These systems require separate load calculations, controls, heat-transfer fluid and realistic operating-cost planning.
Boiler Controls & Accessories
Useful additions can include outdoor-reset sensors, compatible thermostats, zone controls, mixing controls, indirect domestic hot-water tanks, hydraulic separators, air and dirt separation, system treatment, equipment stands and monitoring modules. AirZone recommends accessories only when they solve a design, control, protection or serviceability need in the actual system.
Should You Repair or Replace an Older Boiler?
Age is only one factor. AirZone considers safety, condition, repair history, parts availability, efficiency, system design and the cost of solving the present fault. A well-maintained older boiler may still deserve a repair; repeated failures or a compromised heat exchanger can change the calculation.
Repair May Make Sense When
- The fault is isolated and the rest of the system is in sound condition.
- Replacement parts are available and reasonably priced.
- The boiler has not developed recurring leaks or safety concerns.
- Comfort is good and fuel use remains reasonable for the home.
- A repair can provide dependable service without postponing an inevitable major failure.
Replacement Deserves Consideration When
- The boiler is roughly 15 to 20 years old and major repairs are accumulating.
- There are recurring leaks, combustion concerns or heat-exchanger problems.
- Critical parts or manufacturer support are becoming difficult to obtain.
- The existing boiler is badly oversized, short cycling or unable to heat zones evenly.
- A renovation, hot-water change or heat pump creates an opportunity to redesign the system.
High-Efficiency Bosch & IBC Boiler Options
Bosch and IBC manufacture compact high-efficiency boilers for heat-only and combination applications. Product specifications matter, but the installation determines how effectively the boiler can modulate, condense, circulate and serve the connected zones.
Compare Boiler Models After a Home Assessment
Review the boiler models AirZone installs, but use specifications as one part of the decision. Before recommending equipment, we confirm output, modulation, venting, domestic hot-water capacity, control compatibility and the needs of each heating zone.
The best model on paper can still be the wrong boiler for a particular zone load, radiator temperature or hot-water pattern. Proper matching protects comfort and reduces unnecessary cycling.
View Boiler ModelsWhy Ottawa Homeowners Choose AirZone for Boiler Work
Boiler homes are not interchangeable. AirZone combines product knowledge with field experience in older radiator homes, modern condensing systems, radiant floors and complex mechanical rooms. We support the system from initial diagnosis or design through installation, commissioning and maintenance.
Directly Employed Team
AirZone uses its own trained installation and service personnel so the company remains accountable for workmanship and follow-up.
Hydronic System Thinking
Recommendations consider emitters, water temperatures, pumps, zones, controls and domestic hot water—not just the boiler cabinet.
Clear Written Scope
Installation quotes identify the selected equipment and the work required so homeowners can compare real scope, not only a bottom-line number.
Licensed Gas Work
AirZone is a TSSA-registered contractor with certified technicians for regulated fuel-burning equipment work in Ontario.
Repair and Maintenance
The relationship does not end after installation. AirZone provides diagnostics, planned service and Family membership options.
Financing Options
Qualified homeowners can review financing for a planned replacement while retaining ownership of the equipment.
Looking for Boiler Installation or Boiler Repair Near Me in Ottawa?
AirZone serves homeowners across Ottawa and nearby communities. We regularly work on older hydronic systems in central neighbourhoods such as the Glebe, Westboro, Centretown and Alta Vista, as well as radiant and custom systems in Kanata, Barrhaven, Manotick, Greely and surrounding areas.
Ottawa Boiler Questions & Answers
These answers cover the questions AirZone hears from homeowners comparing boiler repair, replacement, combi systems, maintenance and hydronic heating. A home assessment is still required before selecting or sizing equipment.
What is the difference between a boiler and a water heater?
A boiler is primarily part of a space-heating system. It heats water that circulates through radiators, hydronic baseboards, radiant floors or a compatible air handler. A water heater is designed to produce domestic hot water for showers, sinks and appliances.
A combi boiler can perform both jobs, but it keeps the closed-loop heating water separate from the domestic water. AirZone checks the home’s heating and hot-water loads before recommending one appliance for both.
Does a residential boiler boil water into steam?
Most residential boilers installed and serviced in Ottawa are hot-water hydronic systems. They heat and circulate water without turning it into steam. Older steam systems do exist and require equipment and service practices appropriate to that design.
How much does a new boiler cost in Ottawa?
A residential gas boiler often costs approximately $9,000 to $16,000 fully installed and warrantied. The final price depends on boiler type and output, venting, gas work, piping, pumps, zones, controls, domestic hot-water equipment, removal and mechanical-room access.
AirZone provides a written quote after assessing the home so the equipment and installation scope are clear.
How long does a residential boiler usually last?
Many residential boilers provide roughly 15 to 20 years of service, and some last longer. Installation quality, water quality, operating temperatures, cycling, maintenance, usage and parts availability all influence practical lifespan.
Condition and repair history are more useful than age alone when deciding whether to repair or replace.
How often should a gas boiler be serviced?
Annual professional inspection and maintenance are recommended for residential gas boilers. The exact service tasks follow the manufacturer and system design but may include combustion and safety checks, heat-exchanger inspection or cleaning, vent and condensate checks, pressure and leak checks, control testing and verification of pumps and zones.
Annual service is especially valuable before Ottawa heating season, when a preventable failure is easier to address.
Can a boiler be included in an AirZone Family Plan?
Yes. AirZone Family and Family+ memberships include annual maintenance for two eligible appliances, and an eligible natural-gas boiler can be one of them. Memberships can also provide reminders, priority non-emergency support and member discounts.
Eligibility, pre-inspection, covered components, exclusions and service conditions follow the current plan terms. A boiler that is already broken, leaking or unsafe requires diagnostic service first.
What are common signs that a boiler needs repair?
Common warning signs include no heat, cold radiators, uneven zones, water leaks, falling or unstable pressure, repeated error codes, unusual noises, short cycling, ignition failure and a loss of domestic hot water from a combi boiler.
Because the cause may be in the boiler, piping, pumps, valves, controls or heat emitters, a qualified technician should diagnose the connected system.
Can a high-efficiency boiler work with old radiators?
Often, yes. The important question is how much heat the existing radiators can release at the water temperatures the new boiler will use. Large older radiators sometimes provide enough output at lower temperatures, which can help a condensing boiler operate efficiently.
AirZone reviews heat loss, radiator capacity, piping, flow and outdoor-reset settings before confirming compatibility.
Is a combi boiler right for every home?
No. A combi boiler is compact and can provide space heating plus on-demand domestic hot water, but its hot-water output must match the household’s peak demand and Ottawa’s colder incoming winter water.
Homes with several bathrooms or overlapping hot-water use may be better served by a heat-only boiler with an indirect tank or another properly sized water-heating strategy.
Can I combine a boiler with a cold-climate heat pump?
Yes, when the distribution and controls support it. A heat pump can provide efficient heating in milder weather and add cooling, while the boiler can continue serving hydronic zones or provide colder-weather capacity.
The design must account for how each system moves heat and when equipment stages or changes over. AirZone evaluates the home as one comfort system instead of treating the boiler and heat pump as unrelated appliances.
Can I install an electric boiler in an Ottawa home?
Electric boilers are available, but they are not a simple fit for every home. A boiler sized for Ottawa design temperatures can require substantial electrical capacity, and the service, panel and operating cost must be reviewed before equipment is selected.
AirZone can compare an electric boiler with a gas boiler, cold-climate heat pump or hybrid strategy based on the home’s heat loss and infrastructure.
Are boilers good for radiant floor heating?
High-efficiency boilers can be an excellent match for hydronic radiant floors because many floor systems operate at lower water temperatures. Lower return-water temperatures can help a condensing boiler recover more heat.
Tubing layout, insulation, floor covering, mixing, zoning and controls are just as important as the boiler selection.
Are rebates available for a new boiler in Ottawa?
Rebate eligibility depends on the active program and the complete project. A standalone natural-gas boiler replacement does not automatically qualify for an incentive, and older rebate information can remain online after a program closes.
AirZone reviews current Ottawa and Ontario programs when preparing a quote and can explain when a heat pump, whole-home retrofit or financing program creates a valid path.
Should I repair or replace a 15-year-old boiler?
A 15-year-old boiler is not automatically finished. Repair may be reasonable when the fault is isolated, parts are available, the heat exchanger and venting are sound, and the system has been reliable.
Replacement becomes more compelling when failures repeat, major components are compromised, parts are obsolete, fuel use is high or a new system can solve persistent zoning, hot-water or space problems.
How long does a boiler replacement take?
Many straightforward residential boiler replacements can be completed in one to two working days. A complex mechanical-room rebuild, extensive repiping, added zones, indirect tank, fuel conversion or coordination with radiant floors can require more time.
The written scope should identify the expected schedule and any temporary interruption to heating or hot water.
Where can I find a boiler company near me in Ottawa?
AirZone provides boiler installation, repair and maintenance across Ottawa, Kanata, Barrhaven, Orleans, Nepean, Gloucester, Stittsville, Riverside South, Manotick, Greely and Cumberland.
For an active problem, use the online service form or call 613-592-5770. For a planned replacement or hydronic project, request a free written quote.
Explore AirZone Boiler Models
Review current Bosch, IBC and other boiler options available through AirZone. Our team recommends a model only after confirming the home’s heat loss, zone loads, emitter temperatures, venting, controls and domestic hot-water demand.
IBC VX
The IBC VX Series Boilers are designed for Canada and built in British Columbia. One of the most technologically advanced boilers on the market you can have even space heating with high end reliability when choosing the IBC VX Series
IBC SFC
THE ONLY FULLY CONDENSING COMBI BOILER ON THE MARKET You expect your combi boiler to provide enough hot water for both your kitchen and bathroom, as well as enough heat to make your home cozy and warm. Our SFC Combi
Bosch Greenstar
Discover the epitome of innovation with the Bosch Greenstar Boilers, brought to you by AirZone HVAC Services. Crafted with precision German technology, these boilers redefine the standards of home heating. Our Greenstar boilers stand out with their whisper-quiet operation and
Singular Combi Boilers
At AirZone HVAC Services, we’re proud to present the Bosch Singular Combi Boilers – a testament to cutting-edge efficiency and enduring reliability. Designed to meet the heating and hot water demands of modern homes, these boilers are a perfect blend