Commercial Air Conditioning
Commercial air conditioning for offices, retail, hospitality and strata. Project-managed installs, out-of-trading-hours work and maintenance contracts that keep your space comfortable and compliant.
Commercial Fit-outs, explained.
Who we look after
Offices, retail, hospitality, warehouses, education sites and multi-site businesses across Sydney, the Central Coast and Wollongong. Design accounts for real heat loads, usage patterns and ventilation needs, not just floor area.
Built around your trading hours
Installations and major works are scheduled out of trading hours where needed, and commercial breakdowns get same-day or next-available response, because downtime costs you more than the repair.
From fit-out to contract
Supply and installation, repairs and diagnostics, preventative maintenance contracts, and energy-efficiency upgrades of older plant: one accountable contractor across the lifecycle.
Guides & advice
Buying guideSingle phase or three phase: what a Sydney home needs
Single phase reaches 16 to 18 kW in every ducted range we install, and 20 kW and up is three phase in every one we hold a document for. Of our 135 ducted models, 106 are under 17 kW. Here is where each range switches over, what the current tables say, and what an upgrade involves.
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Energy & costsDucted air conditioning cost factors: zones, phases and roof space
Capacity, zones, single or three phase, roof space and duct runs set the price of a ducted system, and at 14 kW the models we install are $328 a year apart to run. Here is what moves each one.
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MaintenanceAir conditioner error codes by brand: what the manuals say
Five manufacturers, five ways to show a fault: a blinking lamp, a code on the remote, a count of flashes. How to read each one, what the common codes mean, and the displays that are not faults, all from the manufacturers' own documents.
ReadCommercial Fit-outs: common questions
Can you work outside business hours?
Yes, routinely. Fit-outs and disruptive works are scheduled around your trading so you do not lose a day.
Do you offer commercial maintenance contracts?
Yes: scheduled preventative maintenance keeps systems efficient and compliant, with priority response for covered sites.
What systems do you install commercially?
Cassettes, ducted, VRV/VRF and packaged units.
What customers say.
5.0 rating · 65 Google reviews
The team were super quick to get back to my enquiry and provided transparent costing for a split system replacement without the need to visit. I will be sure to use Schillair again when i am ready to install a ducted systems in my bedrooms.…
Awesome service and post installation support. Highly recommended.
I had a 5min conversation with Sam - quote provided right there and then, went ahead - and that was that! Replacement 3.5kw system. It was that easy. Quick, efficient - install went well as agreed. Would definitely know where my first poi…
Other services
All servicesMechanical Ventilation
Exhaust, supply and heat-recovery mechanical ventilation that removes stale air, controls moisture and keeps indoor air healthy, essential for tight, modern and commercial buildings.
Learn moreSmart Thermostat Installation
Turn your air conditioning into a smart, app and voice controlled system you run from your phone. We install Wi-Fi thermostats, manufacturer controllers and zone controllers across Sydney, the Central Coast and Wollongong, and set up scheduling, geofencing and energy monitoring so you stop conditioning empty rooms.
Learn moreDucted & VRV System Design
Commercial-grade ductwork and VRV/VRF system design. We calculate heat loads, lay out duct runs and zoning, and produce documented designs for builders, architects and tender.
Learn more