Hydronic underfloor heating panels for Australian homes
26 mm dry panels that go over a new or existing floor, with no slab or screed to pour. Send us your plans and we design the layout and quote the full system.
Floor heating without a slab or screed
HOYA Ondol is a hydronic dry-panel underfloor heating system. Warm water from a heat pump or boiler runs through 16 mm PE-RT pipe set into 26 mm panels, which are laid straight onto the slab or subfloor. Your floor finish goes on top.
The panels are made in Korea by Hoya Hometech and supplied Australia-wide by HOYA Ondol Australia. Because nothing is poured, hydronic floor heating becomes practical in an existing home as well as a new build. New to hydronic heating? Read our plain-English guide.
Suits new builds and renovations
Adds 27.7 mm including the foil underlay, and weighs under 17 kg/m², against about 120 kg/m² for a wet screed.
Nothing to pour or cure
The floor finish can go down once the system is pressure-tested and commissioned.
Designed for your floor
We lay out every panel and pipe run from your plans, with the pipe at 169 mm centres.
Made by Hoya Hometech
Manufactured in Korea and backed by a HOYA Ondol Australia panel warranty, with the length set out on your quote.
No screed of any kind
With HOYA Ondol panels there’s no heating screed to pour: not sand-cement, semi-dry or flowing (liquid) screed. The panels go straight onto a flat slab or subfloor. On a 200 m² floor, that means:
Heating screed
Weight on the floor
About 24 tonnes
Water in the mix
About 2,000–3,000 litres, which has to dry out
Before the covering goes down
Weeks of drying, depending on the screed, its thickness and the conditions
Build-up
About 70–110 mm
HOYA Ondol panels
Weight on the floor
About 2.2–3.3 tonnes of panels
Water in the mix
None
Before the covering goes down
Once the pipe is pressure-tested and, for timber, the heating is commissioned
Build-up
27.7 mm, including the foil underlay
Screed figures are typical estimates, not measurements from a particular job. The slab or subfloor still needs to be flat to within 3 mm over 1 m; if it isn’t, it’s patched or levelled first.
What goes under your floor
27.7 mm
Heating layer, before your floor finish
- Cover panel: 6 mm
- Base panel, with 16 mm PE-RT pipe in its channels: 20 mm
- Reflective foil underlay: 1.7 mm
- Heating layer: 27.7 mm
With 14.2 mm engineered floating timber on top, the finished floor sits 41.9 mm above the slab, plus any underlay. All three panel types finish at the same height, so they can be mixed across one floor with no step.
Dry panel, screed or slab: how much each adds
In an existing home, every millimetre has to be absorbed at doors, thresholds and where the heated floor meets an unheated one. Heights are to the top of the heating layer, before the floor finish.
| System | Build-up | Ready for timber / SPC / carpet |
|---|---|---|
| HOYA Ondol dry panel | 1.7 mm reflective foil + 26 mm panel | 27.7 mm |
| Low-profile wet system | Pipe sheet + poured levelling compound | About 15 mm |
| In-screed | Insulation board + 50–70 mm poured screed | About 70–110 mm |
| In-slab (new builds only) | Pipes cast into the structural slab | 0 mm above the slab |
Typical figures for each system type. Tiles over HOYA Ondol go on a 6 mm tile board. Compare every floor heating system’s height
The panels and system parts
Everything for a heated floor, quoted together from your plans. All three panels are 500 × 500 mm and finish at 26 mm, so they combine across one floor with no step.
Thermostats and controls
Room thermostats so each zone runs at its own temperature.
Under timber, tiles and other floor finishes
The cover panels give a flat, solid base. What goes on top decides the final floor height and how warm the surface can run.
Engineered timber
Floats over the cover panels and is never glued to them. The floor surface is kept at or below 27 °C, the limit timber flooring makers set.
Tiles
Go on a 6 mm tile board laid over the panels, so the heating layer becomes 33.7 mm before the tiles.
Hybrid, SPC and stone
Follow the flooring maker’s own requirements for floor heating. Check them before you order.
How it works
1. Send us your plans
Email or upload your floor plans and tell us which rooms to heat.
2. Get your layout and quote
We design the panel and pipe layout and quote the full system.
3. Delivered Australia-wide
Panels, components and layout plans arrive on site, ready to lay.
4. Laid and connected
Panels laid to our plans, with licensed trades making the connections.
The panels can be laid by a builder, carpenter or flooring installer, following HOYA Ondol’s installation instructions and the panel and pipe layout designed for your floor, working with your hydronic installer. Manifold, heat pump or boiler connections must be made by a licensed plumber, and electrical work by a licensed electrician. In some states, laying the heating pipe itself is also licensed plumbing work, so check with your installer. Warranty requires licensed connections. This does not limit your rights under the Australian Consumer Law.
Recent projects
Homes heated with HOYA Ondol, laid over the existing floor with no screed poured.
O'Connor, ACT
Renovation, in progress
An older Canberra home being renovated with HOYA Ondol across about 150 m². B and C panels are laid straight over the particleboard subfloor, with a heat pump as the heat source and a solid timber floor to finish. No screed was poured.
Area heated
About 150 m²
Panels
B and C
Floor finish
Solid timber
Heat source
Heat pump
Daylesford, Vic
Retrofit, completed July 2025
An older cottage in Daylesford retrofitted with HOYA Ondol across 67.2 m². A, B and C panels are laid on reflective foil straight over the existing concrete floor, with a heat pump as the heat source and a timber floor to finish. About 443 m of 16 mm PE-RT pipe runs through the living area and sunroom.
Area heated
67.2 m²
Panels
A, B and C
Floor finish
Timber
Heat source
Heat pump
See the panels made and laid
Made by Hoya Hometech in Gunsan, South Korea. Full transcript below.
Video transcript: Hoya Hometech factory
Narrated, with background music. About 3 minutes 40 seconds. Captions are available in the video player.
Transcript: HOYA Ondol panels are made by Hoya Hometech, in its own factory in Gunsan, South Korea. The raw material is fed into the plant automatically, then processed, ready for moulding. Computer-controlled machines mould each panel, so every one comes out the same: 500 × 500 mm, and 26 mm high when finished. Finished panels are checked by hand, and stacked. They’re packed in boxes, and shipped to our Carrum Downs warehouse in Victoria, then sent nationwide.
On site, reflective foil goes down over the floor first. The joins in the foil are taped, so the layer stays flat and continuous. The base panels are laid across the room, following a layout designed for that floor. Each base panel clips to the next, edge to edge, so the floor locks together as one layer. The heating pipe is pressed into the panel channels, one circuit at a time. The curved channels in the B-Panels let the pipe turn back at the walls. Each loop is one heating circuit, and every circuit runs back to the manifold. Cover panels clip on over the pipe. There’s nothing to pour, and nothing to dry. They snap onto the base panels, and spread the heat evenly across the surface. The connections to the manifold and heat source are made by a licensed plumber. Then the floor finish goes on, and the room is back in use. With no screed to cure, the room can be used as soon as the floor finish is down. The HOYA Ondol warranty requires licensed connections. Send us your plans at hoyaondol.com.au.
The video shows the factory, then an installation in an office, ending with the furniture back in place. Some original on-screen captions have been blurred.
The panels can be laid by a builder, carpenter or flooring installer, following HOYA Ondol’s installation instructions and the panel and pipe layout designed for your floor, working with your hydronic installer. Manifold, heat pump or boiler connections must be made by a licensed plumber, and electrical work by a licensed electrician. In some states, laying the heating pipe itself is also licensed plumbing work, so check with your installer. Warranty requires licensed connections. This does not limit your rights under the Australian Consumer Law.
Watch HOYA Ondol panels being installed. Full transcript below.
Video transcript: installation
Narrated, with background music. About one minute. Captions are available in the video player.
Transcript: This is HOYA Ondol: 26 mm dry panels, with the heating pipe set into channels. Every pipe run follows a layout designed for the room. It starts on the existing floor. Nothing is poured, so there is no screed to wait for. Reflective foil goes down first, with the joins taped. Then the base panels are laid across the room, and clipped together, edge to edge. The 16 mm PE-RT pipe is run off the reel, and pressed into the panel channels, following the plan. Each loop is one heating circuit. The circuits meet at the manifold. That connection, and the heat pump or boiler, must be made by a licensed plumber. Flat cover panels go on over the pipe. They protect it, and spread the heat evenly across the panel surface. After pressure testing, the floor finish goes on top. For a layout and quote, send us your plans at hoyaondol.com.au.
The video ends with timber boards being laid over an underlay and tapped into place. The cover panel step is described in the narration but not shown on screen. The underlay shown is supplied by the timber flooring supplier, not HOYA Ondol.
The panels can be laid by a builder, carpenter or flooring installer, following HOYA Ondol’s installation instructions and the panel and pipe layout designed for your floor, working with your hydronic installer. Manifold, heat pump or boiler connections must be made by a licensed plumber, and electrical work by a licensed electrician. In some states, laying the heating pipe itself is also licensed plumbing work, so check with your installer. Warranty requires licensed connections. This does not limit your rights under the Australian Consumer Law.
Questions about HOYA Ondol floor heating
How much height does HOYA Ondol add to my floor?
27.7 mm before the floor finish: a 1.7 mm HOYA Ondol reflective foil and the 26 mm panel. Tiles need a 6 mm tile board on top. With 14.2 mm engineered floating timber, the finished floor sits 41.9 mm above the slab, plus any underlay.
Can hydronic floor heating go over my existing floor?
Yes. HOYA Ondol panels are laid on a sound, level slab or subfloor, so a renovation needs no screed or new slab. The floor needs to be within 3 mm over 1 m, or it may need patching or self-levelling compound first. Measure your door clearances and thresholds first, because the floor rises by the heating layer plus your floor finish.
Who can install HOYA Ondol?
The panels can be laid by a builder, carpenter or flooring installer, following our installation instructions and the layout designed for your floor, working with your hydronic installer. Manifold, heat pump or boiler connections must be made by a licensed plumber, and electrical work by a licensed electrician. In some states, laying the heating pipe is also licensed plumbing work. Warranty requires licensed connections.
How much does hydronic underfloor heating cost?
It depends on the area, the rooms and the heat source, so we price each job from its plans. Send us your plans for a panel and pipe layout and a full system quote.
Send us your plans and we’ll design the panel and pipe layout for your floor, with a quote for the full system. Send your plans
Have another question? See all our floor heating questions and answers.
Is HOYA Ondol floor heating right for you?
Tell us about your project and attach your plans. We reply with a panel and pipe layout and a quote for the full system.