"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.
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.
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.
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.
Professional Installation
Gary personally handles the installation — indoor unit, outdoor unit, refrigerant lines, electrical connections, and drainage. Everything is done to Australian Standards.
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.
We provide residential installations across the Central Coast and Lake Macquarie, including:
Free, fixed-price quote. Gary responds within a few hours.
Lilac Air Conditioning has a 5.0 average from 50 Google reviews, and every one of them is five stars. Here are some, in the reviewers' own words.
Heidi Iveson
February 2025
"Not expecting our air conditioning to stop on one of the hottest days of the year, I contacted Gary and he advised me straight away his availability and turned up to review our situation. Unable to source spare parts for our older unit, Gary was up front and honest in quoting, supply and installation. I would highly recommend Gary for his experience, knowledge and thorough communication. Thanks Gary"
Tania Kanaan
July 2026
"We recently had our ducted air conditioning system serviced and were very happy with the service we received. Gary is friendly, knowledgeable and professional. Everything was explained clearly, and the service was completed efficiently. If you are located on the Central Coast, we would definitely recommend Lilac HVAC and will happily use them again in the future."
Sutha Suthakar
June 2026
"We got this group to service our Daikin Ducted reverse cycle AC system. Gary and his team were fantastic. They were on time and did thorough job. We found them to very professional and cleared lot technical questions we had. They are locals!!!!!! and located within the Watagan Estate. Keep up the good work guys."
Michael
January 2026
"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"
Gosford Dental Centre
June 2025
"We highly recommend Lilac HVAC. They were able to fix 3 previously installed units that were incorrectly linked at our business premises. Very professional service and knowledgeable."
Michelle MacKnight
March 2026
"Thanks Gary and your Apprentice for installing my new split system air conditioner. I appreciate your friendliness, punctuality, and job quality. I am very happy with my new system!"
Perfectionist Detailing
February 2026
"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. Thank you Gary!"
Brett Ashman-Steel
January 2026
"Gary came highly recommended by another business. We discussed the problem we were having with my partners business and he provided a quick and affordable quote. Within days the problem was rectified. Very friendly and professional service. Would certainly recommend Lilac HVAC. Thanks Gary"
Takes less than 60 seconds — and it means the world to a small local business.
Free assessment, fixed-price quote, no obligation. Gary personally handles every job across the Central Coast and Lake Macquarie.