Rooftop units

A solution for your air conditioning systems. We offer design-build, maintenance and optimization services.

 Ensure that your rooftop units operate properly and provide optimal comfort to your occupants

Here are a few practical tips on how to manage your air conditioning units.

What is a rooftop unit?

A rooftop unit, as its name indicates, is a piece of equipment installed on a building’s roof which is used to ventilate, heat and/or cool commercial or industrial spaces in order to maintain optimal comfort. The main advantage of a rooftop unit is that it provides a decentralized design, which means that it is not necessary to completely shutdown the system to change the filters, for example.

The importance of rooftop unit maintenance

Inadequately heated and/or cooled buildings can cause many problems, including a loss of employee productivity and computer equipment problems. Additionally, an HVAC system’s mechanical failure can result in several thousand dollars in damages. It is therefore essential to prevent these incidents as well as many service calls by performing proper maintenance.

Discuss it with our team!

Rooftop unit maintenance 

Every maintenance program must be designed according to specific needs. Here are some maintenance examples recommended by the manufacturers and maintenance experts.


  • Lubricate the motor and fan bearings
  • Check the motor and fan pulley alignment
  • Perform a leak detection test on the refrigeration circuit (required by law)
  • Clean the coil’s surface
  • Replace the filters


  • Clean the coil’s surface
  • Check the fan motor operation
  • Observe the unit’s overall operatio


  • Check the operating temperatures and pressures
  • Check the voltage and amperage
  • Check the contacts and starters
  • Check and adjust the operation and safety controls


  • Visually check the fresh air shutter and the economizer
  • Check the room’s thermostat

For more information, talk to our experts.

Who is BAULNE?

Located in Montréal and Québec City, BAULNE offers a wide range of HVAC services for many different business sectors. BAULNE offers HVAC services for industrial, commercial, office, residential and institutional applications.

Thanks to our portfolio of quality clients as well as our team of engineers and technicians that have proven expertise in HVAC, BAULNE  is one of the only Québec-based companies that offers 360-degree services, including building maintenance, design-build and optimization.


1850, 32e Avenue
Lachine (Quebec) H8T 3J7
514 422-0444
Fax. : 514 422-0445
Email :
CMMTQ/CMEQ 8286-4695-15


730 des Chaînons St
Quebec (Quebec) G1C 8C1
418 476-0444