Foil Heater System


An electric underfloor heating system for laminate, engineered wood and other floating floor finishes. It is fitted between an insulating layer and the floating floor deck, adding negligible height to the installation.

Adhered parquet flooring, carpet, vinyl and other resilient floor finishes can be laid over the Warmup Foil Heater by using the Dual Overlay system to create a thin floating floor deck.

The foil heater can be easily lifted and replaced with a new finish if desired in the future. The Foil Heater is made up of a fibre reinforced foil wrapped around a thin multi-strand, dual-core heating cable that is insulated with an advanced fluoropolymer. The foil provides a continuous earth layer within the floor construction whilst diffusing the heat away from the heating cable.

System build-up:

  • Floor finish.
  • Warmup dual overlay (optional).
  • Warmup foil heater.
  • Warmup insulated underlay.
  • Floor deck.
  • Insulation.
  • Joists.

Features and benefits:

  • Foil layer acts a continuous earth layer within the floor construction whilst also diffusing the heat evenly.
  • Installed directly under the floor finish; no self-levelling required.
  • Suitable for regular shaped rooms, where the 0.5 m wide mats can be rolled out across the floor in parallel runs.
  • Suitable for heating under laminate, engineered wood and other floating floor finishes.
  • BEAB Approved and CE marked meeting the highest safety standards.
  • Uses 4iE smart WIFI thermostat.
  • 15-year warranty and SafetyNet installation guarantee.

General information

Uniclass 2015

Ss_60_40_92_27 Electric underfloor heating systemsPrimary


T90/475 Underfloor heating systems

T90/475 Underfloor heating systems

Specification data - Electric underfloor heating systems

Product Reference

Foil Heater System



Power: 140 W. Load: 0.61 A.


Power: 210 W. Load: 0.91 A.


Power: 280 W. Load: 1.22 A.


Power: 420 W. Load: 1.83 A.


Power: 560 W. Load: 2.43 A.


Power: 700 W. Load: 3.04 A.


Power: 840 W. Load: 3.65 A.


Power: 980 W. Load: 4.26 A.


Power: 1120 W. Load: 4.87 A.


Power: 1260 W. Load: 5.48 A.


Power: 1400 W. Load: 6.09 A.


Power: 1680 W. Load: 7.30 A.

Insulation board

Dual overlay

Insulation underlay, 2.5 m²

Insulation underlay, 5 m²

Insulation underlay, 10 m²

Insulation underlay, 25 m²

Standard product features

Technical characteristics:

  • Width: 500 mm.
  • Thickness: 3 mm.
  • Operating voltage 220–240 V AC: 50 Hz.
  • IP rating: IPX7.
  • Output rating: 140 W/m².
  • Insulation: Ethylene tetrafluoroethylene (ETFE).
  • Installation temperature: 5°C (minimum).
  • Connection: 3 m long 'coldtail' connection.

Product Options


For information on resistance consult technical literature. To cover larger areas, several kits should be used together.

Insulation underlay:

  • Warmup® Insulated Underlay is a thin polystyrene insulation barrier with effective acoustic properties to reduce contact noise.
  • The insulated underlay sits between the subfloor and the Foil heater, reflecting the heat upwards making the system even more efficient.
  • Width: 1200 mm.
  • Thickness: 6 mm.
  • Composition: Top layer: grooved polystyrene. Bottom layer: silver foil with adhesive overlap.
  • Rm value 0.19 m²k/W.
  • Contact sound reduction: 25 dB ΔLw when used in conjunction with WARMUP® dual overlay.
  • Operating temperature: -30 °C up to +70°C.
  • Thermal conductivity: 0.036 W/m·K.
  • Density: 18 kg/m³.
  • Fire classification to EN 13501: Efl.
  • Water vapour diffusion resistance (SD): > 100.

- Dual overlay board:

  • Warmup® Dual Overlay is a free-floating subfloor offering a smooth and seamless finish for carpet, vinyl and linoleum.
  • The two layers protect the heating wire from sharp and heavy point loads and provide even heat distribution.
  • Coverage: 2.88 m².
  • Size: 1200 x 600 mm.
  • Thickness: 7 mm (total).
  • Composition: Medium-density fibreboard (MDF) with an interactive adhesive.
  • Density: 770 kg/m³.
  • Bending strength: >40 kg/cm².
  • Humidity: 4-10%.
  • Thermal Rm value: 0.047 m²k/W.-1.
  • Fire classification to DIN 4102: B2.

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