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THE EQUIPMENT GUIDE / Commercial & building systems

VAV terminal units

Zone airflow is part of a larger control sequence.

Variable air volume terminals regulate air delivery to building zones. Options may include reheat or fan-powered arrangements depending on the design.

Plan the project ↓
HVACR / SYSTEM NOTES01Supply duct02VAV terminal03Controlled zone
VAV terminal units: Supply duct / VAV terminal / Controlled zone. Original HVACR.tv conceptual illustration; labels identify project elements, not an installation sequence or construction drawing.

PLANNING / SELECTION / HANDOVER

Before choosing the equipment

Provide zone-use changes and temperature complaints. Ask whether the issue is terminal selection, airflow balance, sensor placement or the central system before replacing components.

What belongs in the quote

Request specified minimum and maximum airflow settings, controls integration and balancing records. Clarify the heating sequence and access for maintenance.

Think about the surrounding system

Bring operating hours, occupancy patterns, tenant constraints and existing equipment schedules to the first discussion. Agree who owns design, electrical work, structural review, roof penetrations, controls and commissioning. Plan shutdowns around the building rather than discovering access restrictions when replacement equipment arrives.

Three questions for your contractor

  1. What airflow range is designed for the zone?
  2. How does reheat operate if provided?
  3. Who checks the terminal with the central system?

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.

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