Equipment Expertise
What is a make-up air unit?
A make-up air unit supplies outdoor air to replace air removed by exhaust systems. Depending on its design, the unit may heat, cool or simply ventilate the incoming air to support building pressure and occupied-space conditions.
Where you’ll find this equipment
- Commercial kitchens and restaurants
- Warehouses and industrial spaces
- Commercial buildings with significant exhaust
- Facilities with dedicated replacement-air systems
System Operation
How It Works
A supply fan delivers outdoor air through filters and, where fitted, heating or cooling sections. Controls may interlock the unit with exhaust equipment. Correct operation depends on both the make-up air unit and the exhaust system it supports.
Equipment Overview
Main Components
Outdoor-air intake and filters
Admit replacement air and protect the equipment.
Supply fan and drive
Move outdoor air into the building.
Heating or cooling section
Temper the incoming air where the unit is equipped to do so.
Dampers and interlocks
Coordinate airflow, equipment operation and protective controls.
Common Problems We Find
- Worn belts or failed fan motors
- Dirty filters and restricted intakes
- Heating or ignition faults on gas-fired units
- Damper and actuator failures
- Incorrect exhaust interlocks
- Building pressure or cold-draft complaints
Why Maintenance Matters
Regular inspections help maintain dependable replacement airflow. Service should review filters, fans, dampers, controls and any heating section, while considering how the unit operates with connected exhaust equipment.
- More consistent building operation
- Earlier identification of wear and deficiencies
- Clearer repair and replacement priorities
The RK Approach
Service that considers the whole building
RK Climate Control supports commercial equipment troubleshooting, preventative maintenance and replacement planning throughout the Lower Mainland. We focus on practical diagnostics, clear documentation and the way each piece of equipment works with the rest of the building.
Describe the building use, the exhaust systems involved and any pressure, heating or airflow problems you have noticed.
Keep Your Equipment Running Reliably
Request service or discuss a maintenance plan for your building.