Harmoni SmartFlex

Harmoni inscreed underfloor heating flex

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Lifetime Warranty
Installer Warranty
Intertek S-Mark

The Harmoni Flex loose-laid cable system provides a flexible and easy under tile heating solution for any floor size or shape, especially small or irregular shape rooms.

Flex is suitable for use beneath most floor types such as ceramic and porcelain tiles, limestone etc. Its thin heating element keeps floor depth to a minimum, making it ideal for retrofitting in older buildings.

  • Lifetime Warranty
  • Superior quality product
  • Lowest price
  • Intertek S Mark approved for added safety
  • Trusted brand
Harmoni underfloor heating flex


  • Easy to install
  • Twin conductor heating cable
  • Suitable for most floor surfaces
  • Can be installed within the thickness of tile adhesive
  • S Mark approved


  • Thickness: 4mm
  • Output: 10W/m
  • Operating voltage: 230/240V
  • Conductor: Twin
  • Minimum bending radius: 30mm


Flex Loose Laid Underfloor Heating Cables

The Harmoni Flex is a loose-laid cable which can be installed beneath most ceramic, porcelain/slate and natural stone tiles. When using laminate, engineered timber or vinyl floors a self-levelling compound should be used.

Harmoni Flex loose laid underfloor heating cables