VRV System for Office with Staggered Occupancy

This case study explores the design of a Variable Refrigerant Volume (VRV) system for an office where occupants arrive between 8:30 AM and 10:00 AM, ensuring both comfort and energy efficiency.

Step 1: Analyzing Heat Load

The office's heat load is assessed based on occupancy, internal heat gains, external heat from windows, and ventilation needs. The system must adapt to the gradual increase in occupancy.

Step 2: Zoning

The office is divided into zones—open workspaces, meeting rooms, and private offices. VRV systems enable independent control based on usage patterns, reducing energy waste in unoccupied areas.

Step 3: Sizing the System

Accurate load calculations and diversity factors ensure optimal system sizing, preventing inefficiencies due to over- or under-sizing.

Step 4: Staggered Start & Scheduling

The system pre-cools the office from 7:30 AM for comfort by 8:30 AM. Occupancy sensors and zone-based scheduling further enhance energy savings. With staggered occupancy, space utilization improves, optimizing meeting rooms, workstations, and common areas.

Step 5: Energy Efficiency & Air Quality

Inverter technology, smart controls, and a Dedicated Outdoor Air System (DOAS) enhance efficiency and maintain air quality. Proper ventilation ensures a healthy and productive workspace.

This VRV system effectively balances comfort, energy efficiency, and sustainability, making it ideal for modern office environments.