Megan Parker
6 months ago
"Had a wonderful experience! Gary and his team were professional, friendly, and efficient. Had an aircon installed and it looks great. I highly recommend their services!"
Google review
Our Services
Residential Air Conditioning Installation
"Split systems and ducted AC installed right, first time."
Expert installation of split systems and ducted air conditioning tailored for Central Coast homes. Custom sizing, energy-efficient Hitachi and Temperzone units, and a tidy finish guaranteed.
Overview
The Central Coast gets hot. Really hot. And when summer hits — whether you're in a brick veneer in Gosford, a weatherboard cottage in Woy Woy, or a new build in Tuggerah — you need an air conditioning system that's been sized correctly, installed properly, and backed by someone who'll still be around if something goes wrong.
Gary Lui has been installing residential air conditioning across the Central Coast and Lake Macquarie for years. As an authorised Hitachi and Temperzone installer, every system he puts in is matched to the room, the home, and the lifestyle of the people living in it. No overselling, no undersizing, no shortcuts.
How It Works
Our Process
1
Free On-Site Assessment
Gary visits your home, measures the space, assesses insulation and sun exposure, and recommends the right system and size for your needs.
2
Fixed-Price Quote
You receive a written, fixed-price quote. No hidden extras, no surprises on invoice day. The price quoted is the price charged.
3
Professional Installation
Gary personally handles the installation — indoor unit, outdoor unit, refrigerant lines, electrical connections, and drainage. Everything is done to Australian Standards.
4
Full System Handover
Before leaving, Gary walks you through your new system — how to use it efficiently, what the warranty covers, and when to schedule your first service.
What's Included Split system installation (single and multi-head) Ducted air conditioning systems Authorised Hitachi & Temperzone installer Custom system sizing for every room Full orientation on your new system 5-year manufacturer warranty supported Neat cable management and tidy finish All electrical work included
Service Features
Service Area
We provide residential installations across the Central Coast and Lake Macquarie, including:
FAQ
Frequently Asked Questions
A standard single split system installation typically takes 3–5 hours. Multi-head or ducted systems may take a full day or more depending on the complexity of the job.
Yes. We regularly retrofit ducted systems into existing homes across the Central Coast. We assess roof space and structural requirements during your free quote.
We are authorised Hitachi and Temperzone installers and recommend these brands for their reliability, energy efficiency, and long-term support. We can also install other major brands on request.
System sizing depends on room dimensions, ceiling height, insulation, window area, and sun exposure. An undersized unit runs constantly and never cools properly; an oversized unit short-cycles and wastes energy. Gary sizes every system correctly during the free assessment.
Yes. All electrical connections are included in the installation. Gary is fully licensed for both refrigeration and the associated electrical work.
Yes. All installations carry a workmanship warranty in addition to the manufacturer's product warranty. Hitachi and Temperzone both offer 5-year warranties on their residential units.
Yes. We work with both landlords and property managers across the Central Coast. We can coordinate access with tenants and provide documentation for your records.
Get a Quote
Free, fixed-price quote. Gary responds within a few hours.
Lic: 469578C
RTA: AU068433
Fixed-Price Guarantee
Same-Day Response
What Our Clients Say
Trusted for Residential Installations Across the Central Coast
Trusted by families and businesses across the Central Coast and Lake Macquarie.
Brett Ashman-Steel
Local Guide · 3 months ago
"Gary came highly recommended by another business. He provided a quick and affordable quote and within days the problem was rectified. Very friendly and professional service. Would certainly recommend Lilac HVAC."
Google review
Perfectionist Detailing
3 months ago
"From start to finish, Gary was a pleasure to deal with when we needed an additional outlet installed to our ducted aircon system. He is a highly knowledgeable professional who takes pride in his work and the service he delivers to customers."
Google review
Michael
3 months ago
"We had four air conditioners installed and couldn't be more satisfied. From the initial quotation to the final installation, communication was always prompt and professional. The installer arrived on time, worked diligently, and ensured everything was installed to a high standard. Excellent workmanship and very reliable service."
Google review
Rod Fernandez
3 months ago
"Gary came out to my place on pretty short notice and did a great job on maintenance on our ducted system. He's a friendly polite guy and his offsider was great as well — very reasonable price and tidy work. I'll definitely recommend Lilac HVAC and re-engage them for future work."
Google review
Robin Koraca
7 months ago
"The installer was on time and did a wonderful job. The price was excellent and we were so happy with the job we are having another unit installed to replace an old unit. Highly recommend this company."
Google review
Michelle Swanepoel
8 months ago
"Very friendly service — the work done was neat and quick and he took the time to answer all questions we had. Communication was excellent, keeping us in the loop of any delays or expected timeframes. Highly recommend Gary!"
Google review
Jordan Richardson
9 months ago
"Very impressed with Gary from Lilac. He arrived on time and was very professional. The job didn't take long at all and our new AC unit has taken the edge off this winter. Highly recommend."
Google review
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Get a Fixed-Price Quote for Residential Installations
Free assessment, fixed-price quote, no obligation. Gary personally handles every job across the Central Coast and Lake Macquarie.