fusion - thermal · fusion's external wall system provides class leading thermal performance...
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Thermal PerformanceThermal Performance
Fusion's external wall system provides class leading thermal performance in
terms of U-value (actual), linear thermal transmittance (Psi values) and air
tightness. Fusion’s technical team will provide advice and assistance to meet
your thermal performance requirements.
U-Value
The external wall achieves an excellent elemental U-value of 0.21 W/m2K
when used in association with a masonry outer skin. We can provide advice
on achieving required U-values with lightweight cladding build-ups.
Psi Values
All Fusion junctions and openings have been thermally modelled and have
had linear thermal transmittance (Psi) values calculated. These are generally
superior to the default values contained in the new Part L and allow more
favourable values to be entered in energy performance calculations.
Air Tightness
The elemental air tightness of the panel is 0.8 m3/m2h and tests on finished
buildings have achieved air-tightness values of < 5 m3/m2h – well ahead of
the 10 m3/m2h recommended as the default value in Part L of the UK
regulations.