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Your guarantees, our certifications

SODISTRA is committed to a proactive certification policy to provide you with even more guarantees.

Thermal transmittance of the walls

Standard: NF EN 1886: 2006
Ventilation of buildings - Air handling units - Mechanical performances

Role: To measure the thermal transmittance characterised by the heat flow per m2 and by the degree of temperature difference which passes through the unit casing.


Sodistra AHUs obtained the best classification, T1, during the heat performance test performed by TUV Nord.

Thermal transmittance U of the air handling unit casing:

Classification Thermal transmittance U in
Sodistra AHU
T1 ≤ 0,5 0,440 W.m-2.K-1
T2 0,5 < U ≤ 1
T3 1 < U ≤ 1,4
T4 1,4 < U ≤ 2
T5 Pas d'exigence