Tankless Water Heater Installation & Repair in Mississauga & the GTA
Tankless Water Heater
Hot water should keep up with your household. We install, repair and maintain tankless water heaters for homeowners in Brampton, Mississauga and the Greater Toronto Area.
Whether you are replacing an older tank or need help with your current system, our licensed technicians assess your home before recommending equipment. We handle installation and post-install testing, with over 40 years of experience.
Weighing your options? Our traditional vs. tankless water heater comparison explains the differences. For related work around your home, see our plumbing services.
Tankless Water Heater Installation Process
A tankless installation starts with the equipment and connections in your home. We assess hot-water demand, gas supply and venting requirements. The size and layout of your current system help determine the work involved in replacing it.
Our gas fitters handle the gas-line work, and we manage the permits for our installations. The selected unit’s installation requirements guide the connections and venting; the assessment establishes what your home needs.
We test the completed installation before signing off. Ask about the schedule when you receive your quote, particularly if the project includes changes to gas lines or venting. Our guide on when to schedule installation covers planning the work.
Energy Use and Hot-Water Demand
A tankless unit heats water as it is needed instead of keeping a stored supply hot. ENERGY STAR’s buying guidance explains how gas tankless systems work and why sizing matters. Compare the proposed model and your household’s usage when considering operating costs.
An installation quote and an estimate of energy use answer different questions. Equipment, connections and labour affect the upfront price; household demand and fuel costs affect running costs. Compare both when deciding whether to keep a storage tank or switch systems.
We can discuss the equipment options with you and explain the maintenance your selected unit needs. Our tankless maintenance guide covers ongoing care, and our temperature settings guide offers further information.
Choosing Tankless Equipment
Ask which exact model is included in your quote and how it suits your home. A brand or series name alone does not tell you which features are included.
Capacity: Compare the hot-water flow needed when your household uses several fixtures at once.
Controls and recirculation: Confirm whether the quoted model includes these features or requires optional accessories.
Maintenance: Review the selected model’s service instructions and the access needed around the equipment.
Our team can discuss the model, installation scope and applicable manufacturer terms before you choose. For a starting point on the work involved, see our HVAC cost estimator, then request a quote for your home.
Water Heater Replacement in Mississauga and Brampton
We replace traditional tanks and tankless water heaters. If your tank is leaking, hot water runs out too soon or you’re planning an upgrade, we help you compare keeping a tank with switching to tankless. A conversion changes the equipment and connections; the tankless water heater options guide and our tank vs. tankless comparison explain the choices.
For signs that it’s time to act, read our water heater warning signs, repair or replace guide and tankless replacement signs. Our installation timing guide covers planning the work before a breakdown. The installation process above explains the assessment, gas-line work, permits and final testing.
Call (905) 564-5464 or request a free quote to discuss your home. Our local service page also covers heating and cooling work.
Tank vs Tankless: Which Is Right for You?
Choosing between a traditional tank water heater and a tankless system comes down to your budget, hot water needs, and long-term goals. Here is how they compare:
Upfront cost: Compare quotes for the equipment and installation work your home needs. A conversion may involve changes to gas supply, venting and water connections; an advertised equipment price is not a complete installed quote.
Running costs: Savings depend on the units being compared, hot-water use and energy prices. A general efficiency figure does not establish a household’s annual dollar saving or payback period.
Lifespan: A U.S. Department of Energy guide gives a general service life of up to 20 years for tankless water heaters, compared with 10–15 years for tank-type units. These are planning estimates, not a guarantee for a particular heater.
Hot water supply: A 50-gallon tank can run out during peak usage. A tankless system heats water as needed, but its output depends on the unit’s capacity, incoming water temperature and simultaneous demand.
Replacement planning: Consider your existing equipment’s condition, space and household demand. If you are seeing signs of a failing tankless unit, our repair or replace guide explains factors to discuss with a technician.
Are you experiencing a water heater emergency?
We are available 24-7. Click below to access our emergency repair services for your heating systems.
Tankless Water Heater Questions
Does Furnace King install, repair and maintain tankless water heaters?
Our tankless services cover installation, repairs and maintenance for homeowners across the GTA, including Mississauga. A technician can review your current system or replacement plans and explain the appropriate next step.
Do you install, replace and repair water heaters in Brampton?
Yes. We install and replace tankless and traditional tank water heaters for Brampton homeowners, and repair and maintain tankless units. A technician reviews your current unit, gas line and venting, explains the options and provides a quote before the job begins.
What does a tankless water heater assessment include?
Before installation, we assess how much hot water your household needs, the appropriate equipment size and the gas connection. The installation process includes post-install testing.
How do I compare a traditional tank water heater with a tankless system?
The choice depends on your household’s hot-water needs and goals. Review our tank and tankless comparison for the differences, then discuss your home with a technician.
Do tankless water heaters need maintenance?
Yes. Follow the maintenance schedule for your model, including its instructions for descaling and filter care. Water conditions and usage affect service needs. Ask us to review your equipment and explain the maintenance it requires.
Will a tankless heater give my family enough hot water?
It depends on how many fixtures run at once and on the temperature of the incoming water, which is much colder in winter. We size the unit to your household’s peak demand, and larger homes may need a higher-capacity unit.
How much does a tankless water heater installation cost?
The price depends on the model and the installation work, including any gas-line or venting changes. We assess your home and provide a quote before work begins.
Is a tankless water heater worth it?
A tankless unit heats water only when you need it, so it isn’t keeping a full tank hot all day and it won’t run out of stored hot water the way a tank can; the unit itself is also much smaller than a tank. Whether it pays off depends on your household’s hot-water use, so we’ll walk you through it during the assessment.
Tankless Water Heater Service Across the GTA
We provide tankless water heater installation, repair, and maintenance across the Greater Toronto Area. We proudly serve homeowners in Mississauga, Brampton, Etobicoke, Oakville, Burlington, Milton, Toronto, Vaughan, Richmond Hill, Markham, Caledon, and Scarborough. With over 40 years of experience and a fleet of fully stocked service vehicles, our licensed technicians can usually reach your home the same day. Whether you need a brand-new tankless installation or emergency heating services, Furnace King is the GTA’s trusted name in home comfort.