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01 — VRF Air Conditioning

VRF
SYSTEMS

Multi-zone variable refrigerant systems for commercial offices, hotels, hospitals and campuses. Intelligent load matching, simultaneous heating and cooling, and A+++ energy ratings.

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── What We Deliver

INTELLIGENT
MULTI-ZONE
CLIMATE CONTROL

VRF systems use variable refrigerant flow to adapt precisely to each zone’s load in real time — unlike fixed-speed chillers that run flat-out regardless of demand. The result is dramatically lower energy bills, better comfort, and a simpler mechanical installation.

4.8

COP Value

A+++

Energy Rating

1,000+

Max Zones

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── Key Features

WHY VRF?

Variable Capacity

Compressor speed adjusts continuously from 10–100% to match the exact building load — no wasteful on/off cycling.
 

Simultaneous H&C

Heat recovery VRF captures energy from cooling zones and redistributes it as heating — running both simultaneously for near-zero net energy.
 

Long Pipe Runs

Refrigerant piping up to 165m equivalent — ideal for high-rises, large campuses, and buildings where a central plant room is impractical.
 
 

Modular Expansion

Add or remove indoor units at any time without redesigning the system — future-proof for fit-outs and building changes.
 
 

BMS Integration

Full BACnet, Modbus, and proprietary integration with building management systems for centralised monitoring and control.
 
 
 

24/7 Remote Monitoring

Cloud-connected diagnostics allow our engineers to monitor system health remotely and predict faults before they become breakdowns.
 
 
── Our Process

HOW WE DELIVER VRF PROJECTS

01

Site Survey & Load Calc

Heat load calculation using HAP/ E20 Sheet, Room-by-room analysis for accurate system sizing and peak coincidence assessment.

02

VRF System Design

Selection of indoor unit types, piping layout, branch controller sizing, and refrigerant charge calculation with full BIM drawings.
 

03

Installation & Piping

Factory-trained engineers execute refrigerant piping, indoor unit installation, electrical connection, and insulation to manufacturer standards.
 
 

04

Commissioning & Handover

Full leak test, refrigerant charging, BMS programming, performance verification, operator training, and O&M documentation handover.
 
── Brand Partners

SYSTEMS WE INSTALL

Mitsubishi Electric

M-Series & City Multi

HiCool

Multi V Series

Carrier

Agio & AquaEdge

TOSHIBA

VRV IV Series
── FAQ

COMMON QUESTIONS

A conventional split AC has a fixed-capacity compressor that runs at 100% or switches off completely. VRF uses an inverter-driven variable-speed compressor that modulates from 10–100%, matching output precisely to demand. This means no temperature swings, much lower energy consumption, and far longer compressor life.
 
Modern VRF outdoor units can serve between 2 and 64 indoor units, depending on the manufacturer and model. For larger buildings, multiple outdoor units are connected in a combined system serving up to 1,000+ zones.
 
 
A 2-pipe system operates in either all-heating or all-cooling mode at any given time. A 3-pipe heat recovery system has a third pipe (hot gas) that allows some zones to heat while others cool simultaneously, recovering waste heat — significantly more energy efficient in buildings with mixed heating and cooling loads.
 
 
Quarterly filter cleaning of indoor units, annual refrigerant pressure and charge check, condenser coil and fan inspection, drain pan cleaning, and electrical connection check. We recommend a full annual service contract to keep the warranty valid.
 
 
Yes. All major VRF brands support BACnet, Modbus, and LonWorks protocols. We handle full BMS programming as part of our commissioning scope.
 
 

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Shivay Engineers

Private Limited