Combi Boiler Specialists · Toronto & GTA

Combi Boiler Installation Toronto & GTA

One compact, high-efficiency unit for both your heating and your hot water. Navien and Rinnai combi boiler installation across Toronto and the GTA — by a licensed gas technician and TSSA-registered contractor.

Call 416-316-1616 Get a Free Quote
Why Combi

Why a Combi Boiler

A combi boiler does the work of two appliances in one wall-mounted unit — the modern choice for homes with hot-water (hydronic) heating.

2-in-1: Heat + Hot Water

A combi replaces both your boiler and your tank water heater with one compact wall unit — heating your home and making hot water on demand.

Endless On-Demand Hot Water

No tank to run dry or reheat. Hot water is produced the instant you open a tap, and a high-efficiency condensing combi wastes far less energy than a standing tank.

More Space, Lower Bills

Reclaim the floor space your old boiler and tank took up, and cut gas use with 95%+ efficiency and PVC venting.

Right Fit

A Combi Boiler Is a Great Fit If…

Combi boilers suit most GTA homes — especially older houses replacing a bulky boiler and a separate tank at once.

  • You're replacing an aging boiler and a separate hot-water tank at the same time
  • You want to reclaim basement or utility-room floor space
  • Your home has one to two bathrooms with moderate hot-water demand
  • You heat (or want to heat) with radiators or in-floor hydronic loops
  • You want lower gas bills from a high-efficiency condensing unit
  • You're tired of running out of hot water with an old tank
Transparent Pricing

Combi Boiler Installation Costs

Fixed-price written quotes before work begins. Unit, applicable permits and inspections included.

SystemPrice Range (Installed)
Navien combi boiler installed$6,000 – $10,500
Rinnai combi boiler installed$6,000 – $10,500
Combi conversion (remove old boiler + tank)$6,500 – $12,000
Annual maintenance & descale$180 – $350
Written quote before any work begins. All gas work TSSA-registered and with required approvals coordinated. Old equipment removal and near-boiler piping included where required.

Free Combi Boiler Quote

We size the unit to your home and hot-water demand, then give you a fixed written price — including applicable permits and inspections.

416-316-1616
TSSA-Registered · with required approvals coordinated · Navien & Rinnai
Equipment

Combi Boiler Brands We Install

We install the combi brands that perform best in Ontario homes and back them with proper sizing and commissioning.

Navien NCB

Ontario's most popular condensing combi line — compact, efficient, and strong on hot-water flow. The unit we install most often, and the one in many of our before-and-after jobs.

Rinnai

Durable stainless-steel heat exchangers and reliable, steady hot water. A great pick for homeowners prioritizing long-term dependability.

Viessmann & IBC

Premium options for homes that want top-tier modulation and efficiency, or more demanding heating designs. We'll tell you when the upgrade is worth it.

FAQ

Combi Boiler Questions

A combi (combination) boiler is a single wall-mounted unit that provides both your home heating and your domestic hot water. For heating, it circulates hot water through your radiators or in-floor loops; for hot water, it heats fresh water on demand the moment you open a tap, with no storage tank. Because it does the job of both a boiler and a tank water heater, it frees up floor space and cuts standby energy losses. Most modern combis are condensing units reaching 95%+ efficiency.
Combi boiler installation in the GTA typically runs $6,000–$12,000 installed. The range depends on the brand and output — a Navien or Rinnai unit — whether we're removing an old boiler and tank, and any near-boiler piping, gas line, or venting changes. The quote includes the unit, labour, applicable permits and inspections, and you get a fixed written price on-site before we begin.
A tankless water heater only makes domestic hot water. A combi boiler does that and also heats your home through radiators or in-floor heating. If you have a hydronic (hot-water) heating system, a combi boiler replaces both your old boiler and your water heater in one unit. If you only need hot water and heat your home another way, such as with a furnace, a tankless water heater is the simpler choice — we'll tell you which fits your setup.
For most Toronto homes with one to two bathrooms, yes — a correctly sized combi delivers continuous hot water with no tank. The limiting factor is simultaneous demand: running two showers plus the kitchen at once can outpace a single combi's flow rate. For larger homes with high simultaneous demand, we may recommend a higher-output model or a system boiler with storage. We size based on your fixtures and real usage, not guesswork.
Permit and inspection requirements depend on the project scope and municipality. Gas work must be performed by properly certified technicians through a TSSA-registered contractor. We confirm and arrange any approvals required for your job.
Yes — we're based in Thornhill and install Navien and Rinnai combi boilers across the GTA, including Toronto, North York, Scarborough, Richmond Hill, Markham, Vaughan, Mississauga, Aurora, and Newmarket. Combi conversions are especially popular in the area's older homes that still run a bulky boiler plus a separate tank. Same-week installation is usually available.

Ready to Switch to a Combi Boiler?

One call gets you an on-site assessment and a fixed written quote for a Navien or Rinnai combi. TSSA-registered and with required approvals coordinated.

Call 416-316-1616 Request a Quote Online