1. Get the design done before framing
A VRV/VRF system has to be designed before it can be built around. With the architectural plans (and sections, if you have them) we can size each room, choose indoor unit types, select the outdoor unit and lay out the pipework. That tells you where you need ceiling space, bulkheads and penetrations while they're still easy to provide.
2. Ceiling space and bulkheads
- Concealed ducted indoor units need enough ceiling void for the unit, its plenum and ductwork, plus access for servicing.
- Bulkheads are often the neatest answer in bedrooms and hallways. Agree their size and position early, before ceiling heights are locked in.
- Access panels are needed for every concealed unit. Plan where they go so they don't end up in the middle of a feature ceiling.
3. Outdoor plant location
The outdoor unit needs clearance for airflow and servicing, a solid base or brackets, and a location that suits the neighbours and any council conditions about noise. Side setbacks, rooftops and basements can all work, but each has implications for pipe length, access and drainage.
4. Refrigerant pipework routes
Pipework runs from the outdoor unit to branch joints and then to each indoor unit. Every manufacturer sets limits on total pipe length, height difference and distances after the first branch, so routes need to be planned. Allow for penetrations through slabs and walls, and for fire-rated penetrations where required.
5. Condensate drainage
Every indoor unit produces condensate in cooling. Each one needs a drain with enough fall to a suitable outlet, or a condensate pump where gravity won't work. Drains are much easier to run at rough-in than to retrofit.
6. Power and controls
- Electrical supply to the outdoor unit (often three-phase on larger systems) and to the indoor units, with isolators where required.
- Control cabling between the outdoor unit and indoor units, and to each room controller.
- Controller positions agreed with the client and the electrician, ideally grouped with light switches.
7. Rough-in and fit-off
At rough-in, with the frame open, we install the pipework (brazed under nitrogen, insulated, supported and pressure-tested), drainage and control cabling. At fit-off, after plaster and paint, we install indoor units, grilles and outdoor plant, then evacuate, charge and commission the system. Booking both stages into the program early keeps everything moving.
8. Commissioning and handover
Commissioning is where the system is checked against the manufacturer's requirements, every indoor unit and controller is set up, and the owner is shown how to use it. A well-commissioned system is quieter and cheaper to run, and it gives fewer callbacks.
What to send us
- Architectural plans, elevations and sections
- Any mechanical design or brand specification
- Your program or expected rough-in date
How we work on VRV/VRF projects · Air conditioning for builders · Send us your plans