Skip to main content
Licensed & Insured · Serving the Greater Toronto Area (416) 555-1234

Tankless Water Heater Installation

Tankless water heaters deliver hot water on demand without the standby energy loss of a traditional tank. ProFlow is a certified installer for Navien, Rinnai, and Noritz — the three brands that dominate the Canadian market for reliability and efficiency. We handle every aspect of your installation, from sizing the right unit for your household to upgrading gas lines and venting.

Whether you’re replacing an aging tank unit or building new, our licensed technicians will walk you through the costs, rebate options, and long-term savings so you can make a confident decision. Looking for a general overview of all hot water options? Visit our water heater services page.

Get a Free Quote Call (416) 555-1234
ProFlow technician performing tankless water heater installation in a GTA home

What's Included

  • In-home assessment and load calculation
  • Unit selection guidance (Navien, Rinnai, Noritz)
  • Gas line upgrade if required
  • Stainless steel venting installation
  • Condensate drain connection
  • System commissioning and flow-rate verification

Transparent Pricing

$3,500 – $6,500

Includes the unit, installation labour, and all materials. Exact cost depends on unit size, venting complexity, and whether a gas line upgrade is needed.

All work performed to Ontario Building Code standards by licensed professionals. Prices are estimates — your written quote will reflect the actual scope of work.

Request a Detailed Quote

Frequently Asked Questions

How much does a tankless water heater cost to install?
A complete tankless water heater installation in the GTA runs $3,500 to $6,500, including the unit, labour, and all materials. The main cost variables are the BTU rating, venting length, and whether your gas line needs an upgrade. ProFlow provides a detailed written quote after a free in-home assessment.
How long does a tankless water heater last?
Tankless water heaters typically last 15 to 20 years — nearly double the lifespan of a traditional tank. With annual descaling and filter cleaning, some units last even longer. Most manufacturers offer 10 to 15-year warranties on the heat exchanger, the most critical component.
Will a tankless water heater save me money on energy bills?
Yes. Tankless units only heat water when you need it, eliminating the standby energy loss of keeping a tank hot 24/7. Most homeowners see 20 to 30 percent savings on the water-heating portion of their gas bill. The savings add up to $150 to $300 per year for a typical GTA household.
Can a tankless water heater supply enough hot water for my whole house?
A properly sized tankless unit delivers endless hot water — it never runs out. However, there's a limit to how many fixtures it can supply simultaneously. A 199,000 BTU unit can typically handle 3 to 4 fixtures running at once, which covers most households. ProFlow sizes your unit based on your actual peak demand.
Does my gas line need to be upgraded for a tankless water heater?
Often yes. Tankless units require more gas flow than traditional tanks — typically a 3/4-inch gas line instead of 1/2-inch. If your existing line can't deliver enough gas, we'll upgrade it as part of the installation. This is factored into our quoted price.
What maintenance does a tankless water heater need?
Annual descaling with food-grade white vinegar is the most important maintenance task — it removes mineral buildup from the heat exchanger. You should also clean the inlet water filter every 6 months and check the condensate drain for blockages. ProFlow offers annual maintenance plans.
Which tankless water heater brand is best for Canadian homes?
Navien, Rinnai, and Noritz are the top three brands for Canadian installations. Navien offers excellent value with built-in recirculation pumps. Rinnai is known for durability and has the widest service network. Noritz provides commercial-grade reliability. ProFlow installs and services all three.
Which brand is best — Navien, Rinnai, or Noritz?
All three are excellent. Navien units tend to offer the best value with high efficiency and built-in recirculation pumps. Rinnai is known for durability and has the widest service network. Noritz offers commercial-grade reliability at a competitive price point. We'll recommend the best fit based on your household size and hot water demand.
What size tankless water heater do I need?
Sizing depends on how many fixtures you want to run simultaneously and your incoming water temperature. Most GTA homes need a unit rated between 160,000 and 199,000 BTU. During our assessment, we measure your groundwater temperature and map your peak demand to recommend the right size.
Are there rebates for tankless water heater installation in Ontario?
Yes. Enbridge Gas offers rebates for qualifying high-efficiency tankless units, and some municipalities have additional incentive programs. We'll help you identify available rebates during your consultation and provide the documentation you need to apply.
How much does a plumber cost in Toronto?
Most GTA plumbers charge between $100 and $200 per hour, plus materials. A typical service call runs $150 to $350 depending on the job. ProFlow provides free written estimates before any work starts, so you always know the cost upfront.
Do I need a licensed plumber in Ontario?
Yes. Ontario law requires anyone performing plumbing work to hold a valid licence regulated by the Technical Standards and Safety Authority (TSSA). Unlicensed work can void your home insurance and create safety hazards. Every ProFlow technician is fully licensed and insured.

Available Across the GTA

We provide tankless water heater installation services throughout the Greater Toronto Area. Select your community to learn more.

Toronto Mississauga Brampton Markham Vaughan Richmond Hill Oakville Burlington Hamilton Oshawa Whitby Ajax Pickering Newmarket Aurora

Related Content

Related Services

Water Heater Installation & Repair

Expert installation, repair, and maintenance for tank and tankless water heaters from all major brands. Same-day service available across the GTA.

Pipe Repair & Replacement

Expert pipe repair and replacement for copper, PEX, and ABS systems. We offer trenchless technology for minimal disruption and same-day burst pipe response.

Bathroom Renovation Plumbing

Complete pipe and fixture services for bathroom renovations — from rough-in to final installation. We handle every detail of your project.

Helpful Articles

Water Heater Installation Cost in Toronto

Compare tank vs tankless prices, installation fees, and cost factors.

Bathroom Renovation Cost in Toronto

Complete 2026 cost breakdown for budget, mid-range, and luxury remodels.

Ready to Get Started?

Our licensed plumbers are ready to help. Get a free quote today — no obligation, no surprises.

Get a Free Quote Call (416) 555-1234