Enviroair Underfloor Heating

Underfloor Heating

Compared to traditional radiators, underfloor heating is far more efficient when heating a home as it provides a steady, even temperature throughout the house. Enviroair Underfloor Heating systems by Firebird in the UK produce efficiency at low water temperatures resulting in reduced running costs.

Our underfloor heating systems are suitable for both new build and upgrade projects, “wet” underfloor heating is the most efficient way to provide space heating as it is up to 25% more efficient than traditional radiators.

How Underfloor Heating works

Heat is supplied directly to the floor as radiant heat (distributed evenly), creating a more comfortable environment than the air provided by conventional radiators. Underfloor heating generally runs at around 45°C as opposed to 80°C used in radiator systems, thereby saving on energy and running costs, especially when used with a renewable heat source such as the Firebird Enviroair Air Source Heat Pump.

Enviroair Underfloor Heating systems are suitable for a wide range of ground and upper floor constructions. Using the full range of system components, it is simple to create individual heating systems to achieve required comfort levels. Enviroair Underfloor Heating systems can be easily combined with radiator systems for extensions and conservatories, or to create a mixed heating system offering radiators on upper floors if desired.


  • 25% more efficient than traditional radiators.
  • Ideal for well insulated, low energy homes.
  • More space and design freedom.
  • Cost effective to run.
  • Safety and comfort.

How does a water underfloor heating system work?
A “wet” underfloor heating system is like a giant radiator at floor level. A series of plastic pipes are connected to a heat source to circulate warm water throughout the floor to heat the space by producing radiant heat. Since the floor (the radiator) is so large and the heat is more evenly distributed, it only needs to run at a low temperature to heat the room. This means that the water flowing around the floor needs to be at a far lower temperature than a traditional radiator system.

The diagrams illustrate how the heat travels around the room in a radiator system (left) and in an underfloor heating system (right). The underfloor heating system heats the living area in the room, whilst the heat from the radiator system collects at the ceiling – a much less efficient heating method.

Following a basic sequence of operation, a typical controlled underfloor heating system will respond to the heat demand in the property as required.

How does an Enviroair underfloor heating system link with a Firebird Enviroair Air Source Heat Pump?
The underfloor heating system works in the same way as a radiator system does when linked to a boiler in a traditional heating system. The water and air temperature are controlled through the Enviroair Air Source Heat Pump controller which operates the entire heating system.

Underfloor heating

Multilayer Railing Underfloor Heating System

Ideal for New Builds and Home Upgrades

Underfloor heating firebird

Multilayer Pipes

Underfloor heatingThe Multilayer Pipe with an embedded aluminium layer is oxygen tight. Despite being highly flexible, this multilayer pipe is characterised by high tenacity and fatigue strength. Polyethylene of raised temperature resistance: due to the unique molecular structure, a crosslinking is not necessary to achieve a long term temperature stability. Coextrusion: all layers being produced simultaneously: therefore a homogeneous and very stable material bonding is created. Due to the layer technology, the oxygen barrier is protected from mechanical damage.

The Multilayer Piping is available in 50m, 100m, 200m, 300m, 500m and 1000m.


Technical Properties

Working Temperature70°C
Max. Temperature95°C
Max. Operating Pressure (ISO 10508) at 70°C6 Bar
Standard Colour InsideTransparent
Standard Colour OutsideWhite
Other ColoursOn Request
Pipe PrintingCustomer-Specific
PackingCarton, Foil or Stretch Wrapped

Ideal for New Builds and Home Upgrades.



Essentially the manifold allows for every loop of piping in a building to be connected to and from the manifold in a single continuous length with no fittings in between, completely removing the possibility of joint leaks. If there is a fault with an individual circuit or maintenance is required, that circuit can simply be turned “off”. The 1-12 port manifolds are supplied complete with flowmeters for ease of commissioning. Also included within the manifold are fill and drain ports, automatic air vents and fixing brackets.

Air or Water Temperature Controls

Using a wide range of wired and radio controlled systems, including app enabled technology, room temperatures can be individually controlled, allowing the occupier maximum flexibility, whilst increasing the energy efficiency of the building.

Rail System

With the rail system, the fixing of the underfloor heating pipes takes place with the help of the self-adhesive fixing rails. A rail installation has the advantage that the heating circuits can be changed as desired without damaging the underlaying insulation. It provides a good acoustic as the impact noise insulation is not penetrated.

Water Temperature Controls (if required)

Water based underfloor systems work by turning the entire floor into one large low temperature radiator, which is heated via a network of pipes that are embedded within the floor. Since the floor is so large, it only needs to run at a low temperature to heat the room. This means that the water that flows around the floor needs to be at a far lower temperature than a traditional radiator system. A wide range of products are available to control the water flow and temperature including Control Packs, Thermostatic Mixing Valves and Weather Compensators.

Product Specification