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Licensed & Insured · Serving the Greater Toronto Area (416) 555-1234

Serving 338K residents

Professional Tankless Water Heater Installation in Markham, Ontario

Dedicated tankless water heater installation and service. We carry Navien, Rinnai, and Noritz units with professional sizing, venting, and gas line work included.

Serving neighbourhoods including Unionville, Cornell, Markham Village, Berczy, Cathedraltown and surrounding communities, our licensed technicians bring local expertise and fully equipped trucks for same-day service.

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

Why Markham Homeowners Choose ProFlow for Tankless Water Heater Installation

Every community has unique plumbing characteristics shaped by housing age, soil conditions, and local infrastructure. Our technicians are experienced with the specific challenges that local homeowners face — from the properties in Unionville to the homes in Cathedraltown.

Hard Water Staining and Fixture Damage

Like much of the GTA, Markham receives hard Lake Ontario water. The chalky white deposits on fixtures and glass shower doors are calcium carbonate. Beyond aesthetics, scale buildup inside pipes and water heaters reduces efficiency and shortens equipment life. A water softener paired with annual heater flushing keeps everything running well.

Local Tip

Unionville's protected heritage district contains some of Markham's oldest homes, many dating to the mid-1800s. These properties often have original cast iron drain stacks that have corroded from the inside out over 100+ years. If you hear gurgling drains or notice slow drainage throughout the house, the cast iron stack may need lining or replacement. We use trenchless pipe lining technology to restore heritage home plumbing without damaging walls or floors.

Every ProFlow technician is licensed through the Technical Standards and Safety Authority and carries full insurance coverage. All work meets or exceeds Ontario Building Code requirements.

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 typically runs between $3,500 and $6,500 including the unit. The main cost variables are the BTU rating you need, the length and type of venting, and whether your gas line needs an upgrade to handle the higher flow. We provide a detailed written quote after an in-home assessment.
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.
How much does tankless water heater installation cost in Markham?
Tankless Water Heater Installation in Markham typically ranges from $3,500 – $6,500 (CAD). Includes the unit, installation labour, and all materials. Exact cost depends on unit size, venting complexity, and whether a gas line upgrade is needed. We provide free written estimates to all local homeowners before starting any work — no hidden fees or surprise charges.
How quickly can ProFlow reach Markham for tankless water heater installation?
Approximately 40 minutes via Highway 404. For scheduled appointments, we offer same-day service when you call before noon. Our fully stocked trucks carry the equipment needed to complete most jobs in a single visit.

Other Services Available in Markham

Drain Cleaning

Professional drain cleaning and clog removal for kitchens, bathrooms, and main sewer lines using advanced hydro jetting technology.

Learn more → $150 – $450

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.

Learn more → $200 – $3,500

Bathroom Renovation Plumbing

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

Learn more → $1,500 – $8,000

Emergency Plumbing

24/7 emergency plumbing response across the GTA. Burst pipes, flooding, gas leaks, and sewer backups — we're there when you need us most.

Learn more → $250 – $800

Sump Pump Installation & Repair

Sump pump installation, repair, and battery backup systems to protect GTA homes from basement flooding caused by rising water tables and heavy rainfall.

Learn more → $800 – $3,000

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.

Learn more → $200 – $5,000

View all plumbing services in Markham

Tankless Water Heater Installation in Nearby Areas

Toronto Richmond Hill Pickering Ajax

Get a Free Tankless Water Heater Installation Quote in Markham

Request a free, no-obligation estimate today. Same-day appointments available for urgent issues. Our licensed plumbers serve all Markham neighbourhoods.

Call (416) 555-1234 Request a Quote Online