Commercial VRF Office Retrofit

Challenge

The client needed to improve cooling comfort across multiple occupied office floors without shutting down daily operations. Existing zoning was uneven, several areas had different occupancy patterns, and the project needed careful coordination around ceiling access, indoor unit placement, pipe routing, drainage, and future serviceability.

Solution

ETC helped structure the retrofit around a phased VRF/VRV approach. The system recommendation focused on zoning flexibility, practical indoor-unit placement, manageable installation phases, and clear equipment assumptions before procurement. The team also aligned product selection with commissioning and maintenance requirements so the facility team would not inherit a difficult system after handover.

Delivery Approach

• Reviewed office usage patterns and separated zones by occupancy, heat load, and operating schedule.
• Shortlisted compatible VRF/VRV outdoor and indoor unit combinations around capacity, routing, and maintenance access.
• Planned installation sequencing so work could move floor by floor with reduced disruption.
• Coordinated commissioning notes, operating assumptions, and handover guidance for facility staff.

Scope

• Cooling load review
• VRF/VRV equipment shortlist
• Installation coordination
• Commissioning support

Deliverables

• Recommended equipment schedule
• Zoning and installation assumptions
• Phased coordination notes
• Commissioning and handover checklist

Outcomes

• Cleaner zoning strategy for different office areas
• Improved maintainability for future service work
• Practical handover notes for facility teams

Key Considerations

• Occupied office floors required low-disruption work planning.
• Indoor unit positions needed to respect ceiling access and existing layouts.
• Drainage, refrigerant piping, and service access were reviewed before finalizing equipment.