Ultimate Panel – OMNIE Underfloor Heating, Heat Pumps & Ventilation

Low build-up underfloor heating panel designed specifically for tiling over.

OMNIE Ultimate is a low build up underfloor heating product manufactured from extruded polystyrene insulation (XPS) that enables tiles or vinyl to be laid with confidence on a firm tried and fully tested floor build up whether the floor make up is a solid slab/ screed or a timber (suspended) deck.

The Ultimate panels are multi-directional providing ease of installation of pipework and incorporate a ‘diffuser channel’ to increase the heat output compared to just simple routed channels. This ‘diffuser channel’ is simply a wide router channel that spans the pipe dropping 2 or 3mm into the panel increasing the contact with the pipe by about 30% which in turn increases the heat output and reduces the warm up time. It is designed in conjunction with tried and tested primers, adhesive and levelling compound from Tilemaster Adhesives Ltd to overcome the usual issue of low build up floating floors moving as well as not having a surface which allows the tiles to bond properly

Ultimate Panel


Panel Thickness (mm)
Height (mm)
Width (mm)
Pipe Centres (mm)
Compressive Strength (kPa)

Heat outputs

As a guide the heat outputs below are based on 12mm PE-RT pipe at 150mm centres with Specified Levelflex screed laid over. Room Temperature = 20°C.

Heat outputs are dependent on the water temperature, floor construction, system dimension, floor finish & design conditions. Contact us for advice and information.

Floor Finish Floor and Return Water Temperature (˚C)





Tile Finish (0.01m²K/W) (5mm Levelflex)

124.0 W/m²

104.1 W/m²

84.2 W/m²

64.2 W/m²

2.5mm Vinyl (0.038) (9mm Levelflex)

114.1 W/m²

95.8 W/m²

77.5 W/m²

59.1 W/m²


Fully tested specialist products

Primer, adhesives and leveling compound (available from Omnie) to provide a firm base for laying tiles and vinyl.


Existing Slab

Existing slab to meet at least SR2 (5mm deviation in 2m) requirements for floor regularity (BS8204) and preferably SR1 (3mm deviation in 2m)

Timber substrate

Timber substrate minimum 22mm tongue and grooved exterior grade plywood or 22mm tongue and grooved green chipboard screwed into the joists at no more than 400mm centres

Chipboard floors should be over boarded. All floors must be deflection free before laying the Ultimate panel (see Tilemaster Adhesives Specification and full installation guide for OMNIE Ultimate for full details)

Advice should always be sought from the flooring supplier/manufacturer as to the best adhesive for use with their product directly onto Tilemaster Levelflex surface.

How to specify

We recommend that you order our products directly through us so that you obtain the most appropriate system and performance specification for the project.

To get a quote please click here or call 01392 36 36 05

Information on product performance and suitability can be supplied by our projects team who are available via our technical support line – 01392 36 36 05. Alternatively please speak to your local business development manager or area sales manager who will happily talk you through our product range and also arrange for samples as you may require.

If you need information on complex constructions such as those with specific acoustic properties, or you have a specialist requirement that is not covered by our standard product range please call 01392 36 36 05.

Detailed installation instructions and a layout plan of the system is included in every system that gets dispatched to site. If you require any additional information at the time of installation we recommend you visit our resources library on our website.

A comprehensive support knowledgebase is also available that contains a wealth of information around installing and commissioning our systems. You can visit the knowledgebase online at support.omnie.co.uk