Hydronic Slab Heating | Devex Underfloor Heating Systems

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in screed hydronic heating

Hydronic In Slab Heating

Are you building or renovating? Heating concrete slabs, or in screed floor heating is a great way to heat a kitchen or large living areas (over 60 m²)!

The heat radiates from the floor giving you a comfortable warmth that won’t blow dust around like forced air heaters. Allergy sufferers can breath a sigh of relief!

There are three possible ways to install hydronic underfloor heating: directly in the slab, in the screed or using diffusions plates with the most common being slab heating.

A hydronic in slab installation is highly efficient and the running costs won’t break the bank, in fact  it’ll save you money compared to many other heating systems.

Installation In Slab

Hydronic in slab heating is the most popular way of installing hydronic floor heating. It is a storage heating system that uses the thermal mass of the slab to store heat.

This installation is typically very slow to respond and can take up to two days to heat (depending on the thickness of the slab and the amount of floor insulation used). However it is more economical to run, especially combined with proper insulation.

We do recommend extruded polystyrene insulation (XPS) beneath the slab and on exposed slab edges to minimise potential heat loss.

This extra step ensures the highest level of energy efficiency and cost savings.

The heating pipe are preferably placed on top of the slab’s mesh with the concrete poured over the piping.

Other options are available if the in slab heating installation does not allow the hydronic pipes placement over the steel mesh.

Hydronic Underfloor Heating Essentials

With Australian made products and knowledge you can rely on Devex Systems for reliable floor heating solutions, not just for in slab heating but also timber floor heating, under carpet heating, under tile heating and more!

We will help you choose the perfect installation for your project

An efficient radiant heating that does not sacrifice comfort. Never feel a cold zone in your room again whilst removing harmful airborne allergens and bacteria from forced air installations.

The Benefits of In-Slab Heating

With in slab heating, once the slab is heated through, the heat radiates from the floor upwards into the room. This creates a comfortable and gently heated environment with no draughts, dust or noise.


Another factor in the efficiency of your floor heating system is a high quality thermostat. This will allow you to heat specific rooms independently and program each room needs accordingly.

Since hydronic floor heating is a central heating system, we recommend non-programmable thermostats for your installation. These thermostats can be linked to your home automation systems.

A good quality thermostat will give greater control over temperature, zoning and timing, allowing you to make the most our of your floor heating system.

For your perfect underfloor heating solution, contact our specialists!