M-01 Commercial HVAC
Central air conditioning and ventilation for commercial buildings
Supply, installation, renovation and maintenance of HVAC for offices, retail, education, community and light industrial buildings across Auckland. We work directly for owners, and as the mechanical subcontractor for builders.
Systems
What we install, upgrade and look after
We choose the system for the building, not the other way round: how it's used, when it's occupied, what power and plant space there is, and who will maintain it.
VRF / VRV systems
Multi-zone heating and cooling with individual room control. A common replacement for ageing chillers and multiple split units in offices and schools.
Chilled water
Air handling units, fan coil units, pipework and valves. Upgrades, partial replacements and connections to existing central plant.
Packaged and ducted DX
Rooftop packaged units and ducted splits for retail, hospitality and open-plan spaces, sized to the real load.
Split and multi-split
Wall, cassette, ceiling and floor units for smaller tenancies, server rooms and meeting rooms.
Mechanical ventilation
Outdoor air, toilet and general exhaust, and heat recovery, designed and balanced to NZS 4303.
Controls
Thermostats, time schedules, CO sensors and connections to building management systems, set up so people can actually use them.
Speciality Renovation & alternatives
Upgrading central systems in buildings that are already running
Replacing commercial HVAC is rarely a straight swap. The building has changed, the rules have changed, and the people inside still need to work.
- Condition survey first. We check what can stay (pipework, ducts, risers, power, penetrations) before anything is priced.
- Options, priced separately. For example: repair and extend life, replace the plant only, or move to a different system such as VRF.
- Alternative solutions when the standard design doesn't fit: jet fans instead of long duct runs, relocated plant, or a different system type, developed with the designer so it can be consented.
- Staged work in occupied buildings, floor by floor or after hours, with a programme agreed with you and your tenants.
- Change of use handled properly: ventilation and air conditioning reworked for the new use, with producer statements for council.
For builders & consultants
A mechanical subcontractor that reads the drawings
Engineering-led pricing and delivery for main contractors, builders, architects and building services designers.
Pricing from drawings
Tender pricing with a clear scope, quantities, inclusions and exclusions, so there are fewer surprises later.
Buildability and RFIs
We check that the design fits the ceiling space and structure, and raise questions early, before they cost time on site.
Installation and coordination
Ductwork, pipework, equipment and controls installed in sequence with the other trades and your programme.
Testing and commissioning
Airflows measured and balanced against design, and systems tested and set up before handover.
Consent documents
PS3 producer statements for the work we install, commissioning results and as-built information for code compliance.
Handover and aftercare
Operating guidance for the building owner, and a maintenance agreement if they want one.
Ventilation
Mechanical and car park ventilation
Fresh air is a Building Code requirement as much as a comfort one. We install and commission ventilation for offices, community buildings, toilets, storage and enclosed car parks.
- Outdoor air and exhaust systems to NZBC G4 and NZS 4303
- Enclosed car parks to AS 1668.2, including jet fan systems with carbon monoxide control
- Toilet, storage and general exhaust
- Airflow testing and balancing, with results recorded
- Project
- Retail to indoor car park
- Location
- Mt Roskill, Auckland
- Solution
- 2 jet fans and a roof exhaust fan with CO control
- Also
- Fresh-air fan, toilet exhaust and ductwork
- Commissioning
- All measured airflows within 8% of design
- Sign-off
- PS3 producer statement, 2024
M-03 Maintenance & operation
Keep it running after handover
Planned maintenance agreements for commercial systems: scheduled visits, filters, coils, drains, refrigerant and electrical checks, controls settings and a written record of every visit. Contract clients get priority when something breaks.
We also help with operation: time schedules, seasonal set-points and tuning, so the system isn't heating and cooling an empty building.
Questions
Common questions from owners and builders
Can you work while our building stays open?
Yes. Most of our commercial work is in occupied buildings. We stage the work by floor or zone, do noisy or disruptive tasks after hours where needed, and agree the programme with you and your tenants before we start.
Do you provide producer statements?
Yes. We provide PS3 producer statements (construction) for the mechanical work we install, along with commissioning results and as-built information for the code compliance certificate.
Can you price from consultant drawings?
Yes. Send the drawings and specification and we'll return a priced scope with quantities, inclusions, exclusions and any questions about the design.
Our system is old. Should we repair or replace it?
It depends on its condition, its refrigerant, how much the repairs cost each year and how the building is used now. We survey it and give you both options with prices, so the decision is based on numbers rather than a sales pitch.
Do you design systems, or only install them?
Both. We design and build smaller systems ourselves. For larger or consented projects we work with the building services designer, and we often help develop alternative solutions when the original design doesn't fit the building.
Tell us about your system
Send a few photos of the existing units and their nameplates. We'll tell you what's worth repairing, what's worth replacing, and what the alternatives are.