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Part L Energy Conservation

7. Under floor heating systems

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Section 7 - Underfloor heating systems

This section provides guidance on the specification of underfloor heating systems in dwellings.

7.1 - Scope of guidance

The guidance in this section covers systems that use hot water as the energy carrier and those that rely on electric heating elements. It should be used in conjunction with the guidance on central heating systems in the fuel-based sections of this guide on gas-fired, oil-fired, solid-fuel or electric heating systems.

Underfloor heating in new dwellings should meet all of the following conditions:

  1. The minimum provisions for control of the system and safe operating temperatures as given in Table 26 should be met.

AND

  1. The minimum provisions for floor insulation and system design to minimise distribution losses should be met as outlined in Table 27.

AND

  1. For electric underfloor heating systems in new dwellings the minimum provisions for construction and controls as set out in Table 28 as applicable to the type of system.

Table 26

general G6

Table 26A

Table 27

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Table 27A

Table 28

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Table 28A

Energy External insulation Cavity wall insulation Underfloor insulation Underfloor heating Underfloor heating pipes Air to water heat pump Air to air heat pump Air to ground heat pump Gas boiler Ceiling insulation Roof insulation Suspended floor Controls Time and temperature Zone control Ground conditions Sound insulation Tongue and groove Energy grants Building energy rating Energy performance certificate Home energy assessment Water pump Water tank Bead insulation Pumped insulation External wall insulation Floor tiles Electric showers Water membrane Water vapour membrane Vapour control layer