Nexklima commercial HVAC technicians on site

Rooftop & make-up air units

Full-lifecycle service for rooftop units and make-up air systems — from belts and filters to crane-lift replacements.

  • TSSA licensed & insured
  • 24/7 emergency service
  • Serving the GTA since 2001
TSSA licensedFully insured technicians
24/7/365Emergency service, every day
All major brandsLennox, Carrier, Trane & more
Since 200120+ years in the GTA

Rooftop units and make-up air systems handle your building’s air distribution and pressurization. We look after them from routine filter and belt care to crane-lift replacements and burner calibration, so your space stays comfortable, ventilated and pressure-balanced all year.

What we do

Turnkey RTU replacement and crane lifts

Replacements planned around your business hours.

  • Roof load checks, custom curb adapters and rigging
  • High-tonnage replacements with minimal disruption
  • Gas piping, high-voltage connections and duct transitions

Make-up air unit tuning and service

Safe, balanced fresh air.

  • Burner adjustment on direct- and indirect-fired units
  • Airflow balancing, belt tensioning and blower alignment
  • Heat exchanger crack inspection and carbon monoxide checks

Economizers and indoor air quality

Free cooling and cleaner air.

  • Dry-bulb and enthalpy economizer sensor calibration
  • Outdoor air damper actuator repair and seal replacement
  • Filter rack retrofits for MERV 13+ filtration

Signs your rooftop unit needs attention

Short-cyclingThe unit turns on and off rapidly without reaching temperature.
Pressure problemsDoors slam shut or are hard to open because the building is under negative pressure.
Belt or bearing failuresSquealing from the fan housing often points to pulley misalignment.
Rising energy billsDirty coils or a low refrigerant charge keep compressors running non-stop.

Common questions

An RTU conditions and recirculates indoor air. An MAU brings in outdoor air to replace what kitchen hoods, washroom fans or industrial exhaust remove.

Related services

You might also need

Chillers & cooling towers

Chillers & cooling towers

Service, overhauls and tuning for centrifugal, screw and scroll chillers and cooling towers.

Boilers & hydronic systems

Installation, burner tuning, loop balancing and safety inspections for heating plants.

VRF & heat pump systems

Multi-zone VRF, cold-climate heat pumps and refrigerant leak diagnostics.

Fleet of Nexklima service vans and trucks

Keep your building ventilation running smoothly

Our stocked trucks reach buildings across Vaughan, Toronto and York Region — day or night.

Scroll to Top