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THE EQUIPMENT GUIDE / Ventilation & indoor air

Make-up air units

Replace the air a building exhausts.

Make-up air equipment supplies replacement air for exhaust systems. Workshops, kitchens and other heavily exhausted spaces need coordinated supply and exhaust planning.

Plan the project ↓
HVACR / SYSTEM NOTES01Outdoor intake02Make-up air unit03Exhausted space
Make-up air units: Outdoor intake / Make-up air unit / Exhausted space. Original HVACR.tv conceptual illustration; labels identify project elements, not an installation sequence or construction drawing.

PLANNING / SELECTION / HANDOVER

Before choosing the equipment

Provide operating schedules and a list of exhaust equipment. Ask who will assess building pressure, heating or cooling requirements and interaction with combustion appliances.

What belongs in the quote

Require the control sequence and balancing scope in writing. For commercial cooking, coordinate with the kitchen ventilation designer and relevant approval requirements.

Think about the surrounding system

Describe the actual concern: moisture, stale rooms, particles, odours or an exhaust requirement. These are different problems. Ask the designer to explain what the proposed equipment addresses, what remains outside its scope and how the result will be measured. Include filter access and regular maintenance in the plan.

Three questions for your contractor

  1. Which exhaust systems drive the design?
  2. How is incoming air conditioned?
  3. Who verifies supply and exhaust balance?

Prepare a useful first conversation

Bring the site location, building use, equipment model details and photographs of accessible equipment. Describe the problem or planned change and any access or shutdown constraints. Ask the contractor to identify design assumptions, excluded work, required approvals and who will commission the finished system.

This is a project-planning guide. Final equipment selection and installation details need a qualified contractor or designer familiar with the site.

Continue learning

Natural Resources Canada — heating, cooling and ventilation ↗

Independent background reading. Manufacturer references illustrate equipment categories; HVACR.tv does not claim a dealer relationship or recommend a specific model.

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