District Air Systems Inc., HVAC contractor in Innisfil and Simcoe County
Water Heaters

Tankless Water Heater Installation

Endless hot water and lower standby losses, sized and vented properly the first time.

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TSSA #000290047
Gas Technician Licensed
HRAI Member
Heating, Refrigeration & AC Institute
WSIB Covered
Workplace Safety Insured
Up to $7,500 in Rebates
Ontario program terms apply
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About our tankless water heater installation service

A tankless water heater only delivers on its promise when the gas line, venting, and flow rate are matched to the house. We size for simultaneous demand and for Innisfil's cold winter inlet water temperature, upsize the gas line when the existing run cannot carry the burner, and vent to code with condensate handled properly. We install Navien, Rinnai, and Noritz.

Winter inlet water in this region drops to roughly 5 degrees Celsius, and that single number is why so many tankless units installed locally cannot keep two showers running in February. We size for the January case, not the July one. The other local constraint is the gas line: a lot of Alcona and Bradford builds ran the minimum size to a tank water heater, and a tankless burner needs considerably more, so we measure the run before we quote rather than after.

Rebates: qualifying equipment can draw Ontario incentives and federal financing, and we prepare the paperwork with your quote. See current Ontario HVAC rebates.

What's included

  • Sizing based on simultaneous demand and winter inlet temperature
  • Gas line upsizing and direct venting included in the quote
  • Isolation valves fitted for future descaling
  • Manufacturer registration and warranty paperwork handled

How the visit works

  1. 1
    Flow and gas assessment
    We count fixtures, measure the existing gas run, and confirm what the burner needs.
  2. 2
    Install and vent
    Unit mounted, gas upsized if required, direct vent run to code, condensate neutralized.
  3. 3
    Commission
    Startup, temperature calibration, and your first descale booked before we leave.
Good to know: Most residential tankless installations include a gas line review. If the existing line is undersized, we quote the upsize up front rather than discovering it mid-install.

Where we provide tankless water heater installation

Innisfil is home base, and our trucks run the same routes daily across Simcoe County and north York Region.

  • Barrie Barrie's older housing stock has plenty of undersized or aging gas piping that needs upgrading before a new appliance can be connected safely.
  • Bradford West Gwillimbury Bradford's larger family households burn through hot water fast, which is why tankless conversions are popular there.
  • Essa Rural Essa properties north toward Newton Robinson are frequently on propane, and appliance conversion has to be done and documented properly.
  • East Gwillimbury Newer East Gwillimbury homes commonly arrive with a rental water heater the owner would rather replace and own outright.
  • Springwater Hard well water through Springwater scales tanks and tankless heat exchangers, so we plan descaling into every install we do out there.
  • Newmarket Newmarket's finished basements make appliance venting routes the deciding factor in what equipment can actually go in.
  • Oro-Medonte Seasonal and cottage properties around Oro-Medonte need equipment and gas work that tolerates being shut down for months at a time.
  • New Tecumseth Alliston and Beeton homes often pair a gas fireplace with the main heating system, and both need annual attention to keep venting safe.

Frequently asked questions

Will a tankless unit keep up in a Simcoe County winter?
Yes, provided it is sized for winter inlet water around 5 to 8 degrees Celsius rather than the summer number. That is where most undersized installs go wrong, and it is the first thing we calculate.
Do I need a bigger gas line for a tankless water heater?
Often yes. A tankless burner can draw 150,000 to 199,000 BTU compared to about 40,000 for a tank. We measure the existing run before quoting so the price you see includes any upsize.

Need service today? We can be there.

Same-day appointments across Innisfil, Barrie, and Simcoe County, with live dispatch 24/7.