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

Commercial HVAC & Rooftop Units

Restaurants, retail, offices, and light-industrial buildings, installed, repaired, and maintained.

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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 commercial hvac & rooftop units service

Commercial HVAC is not just bigger residential equipment. We install and service rooftop units (RTUs), split systems, make-up air units, and light-commercial ventilation for Simcoe County businesses. Preventive maintenance contracts available for multi-site operators.

Commercial work in this region means rooftop units on the retail plazas along Yonge Street in Bradford and the Innisfil town centre, make-up air for restaurant kitchens in downtown Barrie, and process ventilation for the light-industrial units around the Alliston Honda supply chain and CFB Borden. Shift-work buildings run their equipment far past standard duty cycles, so we spec heavier motors and write maintenance intervals around actual runtime hours rather than a calendar.

What's included

  • Rooftop unit (RTU) installation and repair
  • Split systems, MUA, and light-commercial ventilation
  • Preventive maintenance contracts
  • After-hours and weekend service to protect operations

How the visit works

  1. 1
    Site walk & scope
    Full mechanical survey and written scope of work before quoting.
  2. 2
    Install or repair
    Crane-lift RTU replacements, ductwork tie-ins, and controls integration.
  3. 3
    Maintenance contract
    Scheduled quarterly or bi-annual service with priority response.

Where we provide commercial hvac & rooftop units

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

  • Barrie We maintain rooftop units on Barrie retail and office buildings where a failure means closed doors, so those sites get priority response.
  • Bradford West Gwillimbury Bradford's food-handling and greenhouse operations need ventilation and make-up air designed around their process, not a stock package unit.
  • Essa Light industrial units around Angus and CFB Borden run far past standard duty cycles, so we spec motors and intervals against real runtime.
  • East Gwillimbury The Green Lane commercial corridor is mostly newer rooftop equipment where the value is in preventive maintenance and controls tuning.
  • Springwater Springwater's shops and small plants are spread out, so we schedule route-based maintenance rather than one-off visits.
  • Newmarket Newmarket medical and professional offices need quiet, tightly controlled comfort during business hours and setback outside them.
  • Oro-Medonte Hospitality and recreation properties in Oro-Medonte swing hard between full and empty, which controls have to anticipate.
  • New Tecumseth Alliston's automotive supply chain runs shift work, and we plan changeovers around production windows rather than the calendar.

Need service today? We can be there.

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