Seamless rooftop HVAC equipment swaps across the GTA—managing custom curb adaptor fabrication, municipal crane permits, road closures, rigging, gas piping, and final TSSA commissioning.
Direct priority line for property managers and commercial building owners.
Request Replacement Quote 📞 Call DispatchSubmit your commercial building details below, and our replacement engineering division will prepare a comprehensive turnkey proposal.
We handle every technical phase of commercial rooftop equipment swaps so property managers experience zero operational friction.
Full management of mobile crane lifts, certified rigging crews, municipal street closure permits, traffic detail coordination, and structural roof load checks.
Precision field measurement and heavy-gauge galvanized curb adaptor manufacturing to seamlessly transition new RTU footprints to existing roof openings without duct modifications.
Licensed G1 gas fitters and electricians executing gas line extensions, high-voltage disconnect swaps, low-voltage thermostat integration, and economizer wiring.
Rigorous startup procedures including refrigerant charge confirmation, gas manifold pressure calibration, combustion analysis, and TSSA compliance documentation.
How we execute minimal-downtime rooftop HVAC replacements from initial engineering to final commissioning.
Engineers audit existing equipment make/model, roof structural capacity, access clearance, and exact curb dimensions for adaptor fabrication.
We secure city road closure permits, schedule licensed mobile crane operators, arrange traffic safety detail, and coordinate off-peak lift times.
The crane lifts off the old decommissioned unit, installs the custom curb adaptor, and seats the new high-efficiency RTU—typically completed in a few hours.
Technicians reconnect utilities, execute full startup testing, verify airflow and gas pressures, and hand over complete TSSA safety sign-off paperwork.
Read what building owners and property managers across Ontario say about our commercial replacement services.
Common questions property managers and facility owners ask about rooftop HVAC crane swaps.
The actual crane lifting phase—removing the old unit and seating the new unit on the curb adaptor—typically takes 2 to 4 hours. Total on-site utility reconnection, gas piping, electrical wiring, and startup commissioning usually take 6 to 8 hours. We frequently schedule crane lifts during off-peak weekend or early morning hours to avoid disrupting business operations.
HVAC manufacturers change cabinet dimensions and duct opening locations over time. A custom curb adaptor is a heavy-duty, weather-tight galvanized metal transition box that fits directly over your existing roof curb, allowing a modern replacement unit with a different footprint to align perfectly with your building’s ductwork without tearing up the roof structure.
Yes. If the mobile crane needs to set up on a public street, lane, or sidewalk in municipalities like Toronto, Markham, or Vaughan, a temporary street occupancy permit and traffic management plan are legally required. Atrium Air handles all permit applications, municipal coordination, and paid duty police requirements as part of our turnkey replacement service.
In most cases, no. Under occupational health and safety rules, the area directly beneath the lift path inside the building must be clear of personnel while the crane is moving heavy equipment overhead. By scheduling the lift during early morning hours, weekends, or before store/office opening times, tenant disruption is kept to an absolute minimum.
Total turnkey replacement cost depends on unit tonnage (e.g., 3-ton vs 25-ton), high-efficiency or standard efficiency equipment selection, crane size/reach requirements, curb adaptor complexity, and street permit fees. Standard 3 to 10-ton replacements generally range based on brand and site access. We provide detailed, itemized turnkey proposals following our initial engineering audit.
Monday – Saturday: 7:00 AM – 8:00 PM
Sunday: Closed