Mould on a bathroom ceiling usually starts with steam that had nowhere to go. Lilac Air Conditioning installs, replaces and repairs bathroom and toilet exhaust fans in homes, units and strata buildings, ducted properly to the outside.
A bathroom exhaust fan is a small extraction fan, set into the ceiling or a wall, that pulls moist air out of the room and sends it through a duct to the outdoors. When it works, steam is gone shortly after the shower. When it doesn't, the moisture settles on cool surfaces and the mould follows.
Lilac Air Conditioning fits new fans, replaces tired ones and repairs faulty ones in houses, units and strata buildings across the Central Coast and Lake Macquarie. The aim is to fix the damp at its source rather than keep wiping it off.
Plenty of bathroom fans look fine from inside the room. The trouble is often above the ceiling, in where the duct ends up.
Bigger isn't automatically better, and neither is whatever happens to be the first fan on the shelf. A fan should suit the size of the room, how long and straight the duct run is, and how the bathroom is used. A small powder room and a large ensuite with a steamy shower are very different jobs.
Gary measures up, looks at the duct route, and chooses a fan that will move enough air once the duct is attached, since a long run cuts the airflow the label promises. Some fans can also be fitted with a run-on timer, so they keep working for a while after you've left the room.
Bathroom ventilation in a block of units can be less straightforward. Ducts may share a riser, the wall or ceiling may be common property, and an owners corporation may need to approve changes. These are worth sorting out before work starts, not after.
Lilac Air Conditioning sets these points out in the written fixed-price quote, which can be passed to a strata manager or committee as it stands. Where several bathrooms in a building have the same trouble, Gary can quote them together.
A fan that's loud, rattling or barely holding a tissue to its grille isn't always finished. A loose duct or a blocked outlet is a simple fix. A worn motor in an old fan is often better replaced than repaired, and Gary will tell you which case you've got.
If mould is already on the ceiling, the fan stops it getting worse but it won't clean it off. Persistent damp that returns even with a working fan can point to a leak or another source, and Gary will say so rather than selling you a fan to solve it.
Free on-site assessment. No obligation. Gary replies within a few hours on business days.
NSW Contractor Licence 469578C. Serving the Central Coast and Lake Macquarie from Cooranbong.
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.
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!"
Takes less than 60 seconds — and it means the world to a small local business.
From Cooranbong, Gary Lui covers the Central Coast and Lake Macquarie.