Replace exhausted air
The supply arrangement must provide a planned replacement-air path based on the smoke-exhaust demand and approved design conditions.
Need a makeup air system? Start with the exhaust demand.
A smoke-control makeup air system replaces air removed by smoke exhaust through a planned supply path. We assess the exhaust demand, supply location, transfer openings, air velocity, pressure effects, doors, controls and required operating sequence before defining the scope.
- Matched to exhaustReplacement air follows the design demand
- Air path controlledSupply and transfer routes reviewed
- Fire mode coordinatedFans, dampers, controls and power tested
What must smoke-control makeup air do?
It is not ordinary fresh air. The replacement-air volume, entry point and operating sequence must support smoke exhaust without undermining the smoke-control strategy.
Protect the smoke layer
Supply locations, openings and air velocity must be coordinated so incoming air does not disrupt smoke collection or push smoke toward escape routes.
Coordinate doors and pressure
Makeup air affects pressure relationships, doors and transfer paths. Fans, dampers, detection inputs, controls, status monitoring and power must operate with the exhaust system.
From
assessment
to
handover.
Smoke-control makeup air starts with the exhaust demand and the route replacement air will take through the building. We establish that relationship first, then coordinate the equipment, controls, testing and records.
01
Site assessment
We review the smoke-exhaust objective, affected zones, possible supply and transfer paths, doors, current ventilation, controls and available plans.
02
Design & planning
We coordinate replacement-air volume, supply location, transfer paths, fan or opening arrangement, pressure effects, controls, power and exhaust interfaces.
03
Review quotation
We discuss the proposed scope, inclusions, commercial terms and questions before approval.
04
Supply & installation
Supply fans, ducts or openings, dampers, controls, wiring and exhaust interfaces follow the agreed project scope.
05
Testing & commissioning
The installed system is tested and commissioned against the approved project scope and operating sequence.
06
Service + BFP follow-up
We remain available for maintenance, project records and BFP-related follow-up within our scope.
Makeup air installed?
Keep the air path ready.
We inspect and test the makeup-air fans, openings, ducts, dampers, controls, power and smoke-exhaust interfaces against the documented operating sequence and design criteria within our scope.
- 01
Inspect supply fans, belts or drives, openings, ducts, dampers, filters where applicable, controls, status signals and visible system condition.
- 02
Run the agreed fire mode and confirm detection inputs, makeup-air response, smoke-exhaust coordination, monitoring and power conditions.
- 03
Check replacement-air volume, transfer paths, pressure effects and relevant door operation against the documented project criteria.
- 04
Issue test records, identify deficiencies and coordinate corrective work or BFP-related follow-up within our scope.
FAQMakeup air systems,
Makeup air systems,
made clear.
Straight answers about replacement air, smoke exhaust, air paths, pressure, controls, testing and project information.
In smoke control, makeup air is planned replacement air introduced to support the air removed by smoke exhaust. It can be supplied mechanically or through approved openings, depending on the building strategy.
Exhausting air without a controlled replacement path can create unwanted negative pressure, reduce exhaust performance, affect doors or pull smoke through unintended routes. Makeup air completes the planned airflow path.
No. Normal ventilation serves everyday indoor-air needs. Smoke-control makeup air operates for a defined fire-mode objective and must be coordinated with smoke exhaust, controls, pressure conditions and the approved system sequence.
They may be part of the strategy when specifically allowed by the approved design. Their location, available area, reliability, opening sequence and effect on smoke movement and escape routes must be reviewed.
Testing follows the documented sequence and design criteria. It can include confirming fan or opening operation, damper positions, status signals, exhaust coordination, airflow balance, pressure effects and relevant door conditions.
Send the contact person, company, site location, new or existing status, smoke-exhaust information and any architectural, mechanical, electrical, FDAS, smoke-control, testing or BFP documents available.
Request a Site AssessmentTell us about your
Tell us about your
makeup air project.
Send the site location, whether the project is new or existing, and any plans or system details available. We’ll review the information and contact you about the next step.