Bulkhead air conditioning
Bulk Head AC Units on the Gold Coast
Discreet air conditioning where ducted will not fit.
A bulkhead AC unit hides a slim indoor unit in the ceiling, so only a grille shows. Frost Solutions designs and installs bulkhead air conditioning for Gold Coast homes, units and businesses where wall space or roof space is limited.
5.0 from 292 Google reviews
Bulk head AC units Gold Coast
When should you choose a bulk head AC unit?
Choose a bulkhead unit when you want air conditioning that is hidden and quiet but the room has limited wall space, or the house lacks the roof space for full ducted air conditioning. It gives a ducted look in a single room, with only a slim grille showing.
Bulkhead AC units are designed with specific situations in mind. If you want to air condition a room where space is limited, or you want a system that is discreet in both sound and looks, a bulkhead unit is often the answer. Frost Solutions provides bulkhead air conditioning design, installation and servicing across the Gold Coast, Logan and the Tweed and Northern Rivers, from our base in Burleigh Heads.
We supply and install systems from Mitsubishi Heavy Industries , Daikin , Samsung , Hisense , Fujitsu , Mitsubishi Electric and Panasonic . Bulkhead models vary by brand, so we recommend one that fits your space and budget.
How they work
What is a bulkhead air conditioning system?
A bulkhead air conditioning system is a slim ducted indoor unit installed inside a bulkhead or shallow ceiling void, with long rectangular supply and return grilles. It connects to an outdoor unit by refrigerant pipes, like a split system, and heats and cools one room or two adjoining rooms.
Because the unit fits into the ceiling behind the grilles, it frees the walls for decoration, furniture and plants. The fan sits out of sight, so bulkhead units run quietly, which makes them a good fit for bedrooms, smaller apartments, home offices and many commercial rooms. They also suit rooms with concrete ceilings, where a bulkhead can be built to house the unit and pipes.
Where we use them
Where are bulk head AC units used?
We recommend bulkhead units for homes without roof space for ducted, multi-level homes with flat roofs, rooms where a wall split will not suit, apartments with concrete ceilings, and accommodation where every room needs its own control. Each scenario shares one thing: ducted will not fit, but the owner wants a hidden unit.
- Homes without enough roof space for a full ducted air conditioning system.
- Modern multi-level homes with flat or skillion roofs, where ducts cannot reach every room.
- Rooms where a wall split system does not suit the look you want, or where there is no wall space.
- Apartments with concrete ceilings, where a bulkhead can be built to hide the unit.
- Hotels, motels and serviced apartments that need separate temperature control in each room.
Key features
What are the key features of bulkhead air conditioning?
The key features are a range of sizes and capacities, an installation inside a bulkhead or ceiling void with only grilles showing, a clean design that keeps walls clear, and simple controls with temperature, fan, mode and timer settings. Many models add Wi-Fi app control.
Size and capacity
Bulkhead units come in a range of capacities, from small bedroom units to larger units that can serve two adjoining rooms through short ducts. The right capacity depends on the room, not just its floor area.
Installation
The indoor unit sits inside a bulkhead (a boxed-in section of ceiling) or in a shallow ceiling void, with a supply grille and a return air grille. It connects to an outdoor unit with refrigerant pipes, like a split system, and needs a condensate drain.
Design and aesthetics
Only the long rectangular grilles show, set into the face or underside of the bulkhead. There is no unit on the wall, which leaves the walls free for furniture, art and shelving.
Controls and settings
Each unit has its own wall controller or remote with temperature, fan speed, mode and timer settings. Many models offer Wi-Fi control through the manufacturer app, and some can join a multi split system.
Choosing a unit
How do you choose the right bulk head AC unit?
Work out the room's cooling load, compare efficiency on the Energy Rating Label, check the unit fits the bulkhead with room for its drain and service access, plan the outdoor unit and pipe route, and compare indoor noise levels. We do all of this at a free on-site visit.
Work out the cooling load
Capacity should match the room: floor area, ceiling height, insulation, window size and orientation all count. A west-facing room with big windows needs much more than a shaded bedroom of the same size. We calculate it at the quote.
Compare energy efficiency
Use the Australian Energy Rating Label and Zoned Energy Rating Label to compare models. A more efficient unit can cost more up front and save money on every power bill after.
Check the unit fits the space
Bulkhead units vary in height and depth. The bulkhead or ceiling void has to be big enough for the unit, its drain fall and service access, so we measure before we recommend a model.
Plan the installation
Think about where the outdoor unit can go, how the pipes and drain will run, the power supply and how a technician will reach the unit later for servicing and filter cleaning.
Check the noise levels
Bulkhead units are usually quiet because the fan sits behind the grille, but models differ. For bedrooms and studies, compare the indoor sound levels on the specifications.
We help you choose and design the right bulkhead air conditioning for your home or business. A technician visits your property, measures up, talks through how you use each room and suggests suitable brands and models. Once you pick a model, we give you a free written quote for the installation and commissioning, valid for 21 days.
Compare
Bulkhead unit, ceiling cassette or wall split: which is better?
A wall split is the simplest and cheapest, but it shows on the wall. A ceiling cassette is hidden in the ceiling but needs a ceiling void and shows a square panel. A bulkhead unit hides almost everything behind slim grilles, which gives the cleanest look, but it needs a bulkhead or void and costs more to install.
| Option | What shows | Needs | Suits |
|---|---|---|---|
| Bulkhead unit | Slim supply and return grilles | A bulkhead or shallow ceiling void | Bedrooms, media rooms, apartments |
| Ceiling cassette | A square ceiling panel | A ceiling void above the room | Open-plan rooms, offices, shops |
| Wall split | The indoor unit on the wall | A wall near an outside wall | Most single rooms |
If you want most of the house conditioned and there is roof space, full ducted air conditioning is usually better value than several bulkhead units. Where there is not, bulkhead units can also run together on one outdoor unit as a multi head system, which keeps the outside of the house tidy too.
Installation
What does a bulkhead installation involve?
We confirm the unit and grille positions, check the bulkhead or ceiling void, mount the indoor unit with a correct drain fall, install the outdoor unit and run insulated pipes, drain and cable between them. Our own electricians wire the circuit, then we commission the system, show you the controls and clean up.
If the bulkhead needs building, we can work with your builder on a renovation or new build so the framing suits the unit; see new builds and renovations. All our installs are covered by a 10-year workmanship guarantee that includes the gas charge and call-outs, 10 years on pipework and 5 years parts and labour on units. Warranty details.
To discuss bulkhead air conditioning for your home or business, call us on 1300 101 100 (Monday to Friday 7am to 4pm, Saturday and Sunday 9am to 4pm) or send an enquiry and we will get back to you.
Bulkhead questions
Frequently asked questions
What is the difference between a bulkhead unit and ducted air conditioning?
A bulkhead unit is a small ducted unit that serves one room, or two rooms close together, from a bulkhead or shallow ceiling space. Ducted air conditioning uses one larger unit in the roof and a network of ducts to serve the whole house with zoning. Bulkhead units suit homes where full ducting is not possible.
Do I need to build a bulkhead?
Not always. Some homes already have a bulkhead, for example over a kitchen or hallway, or a ceiling void deep enough for a slim unit. Where there is none, a builder or carpenter can frame one. We tell you the size the unit needs so it can be built to suit.
Can several bulkhead units share one outdoor unit?
Yes, with compatible models. Bulkhead indoor units can be part of a multi head split system, so several rooms run from one outdoor unit.
How do I clean a bulkhead unit?
The filter sits behind the return air grille. Most can be removed and washed every few weeks during heavy use. A regular professional service cleans the coil, fan and drain; see air conditioning maintenance.
Keep exploring
Related services and guides
Multi-head systems
Run several bulkhead or wall units from one outdoor unit.
Learn moreDucted air conditioning
Whole-home comfort when there is roof space.
Learn moreSplit systems
The simplest way to cool a single room.
Learn moreCeiling cassettes
Learn moreAir conditioning installation
Learn moreNew builds and renovations
Learn moreCommercial air conditioning
Learn moreAir conditioning maintenance
Learn moreReal words from real clients
Rated 5.0 from 292 Google reviews
Every review below is from our Google Business Profile. Read them all on Google.
5.0 from 292 Google reviews checked 13 Nov 2026- ★★★★★
From my initial phone call to the pre-check and installation, all correspondence and actions were clear and understandable (for someone who is non tech savvy).. Shout out to Paul (Senior Technician) ... He was also clear when showing me how to use the air-con, and info on future servicing and cleaning when needed. Thanks Frost Solutions Team, I highly recommend you to anyone needing a new aircon :)
Sue Google review, about Jun 2026
- ★★★★★
Wow! Frost Solutions is possibly the best all round company I've worked with for a long time. The admin staff, sales and tradesmen-installers were all very polite, efficient and easy to communicate with. From the time I phoned to organise a quote to the full install was only an about a week ...
Jo Google review, about Nov 2025
- ★★★★★
Incredible service from start to finish! ... We had some extenuating circumstances that caused a number of delays at our end, and a significantly sloping site, but the crew from Frost were super accommodating, kept in touch but we're never pushy to get "the sale". ... We would highly recommend Frost.
Kelly Google review, about Jan 2026
- ★★★★★
Thank you Frost Solutions. Liam and Henry arrived before the booked time, a very good first impression. Both lads did a very professional job installing our Air con. The wife and I most definitely recommend the superb service of Frost Solutions.
Ian Google review, about Sep 2026
Your comfort, our priority.
Talk to us about bulkhead units
Tell us about the rooms and the ceiling space you have. We will visit, measure and recommend the right units.