The U Values for the AC15 steel door have been calculated to EN 673, EN ISO 10077-1 and EN ISO 10077-2. As standard, all AC15 doorsets have an insulated core.
A standard 45mm AC15 with Rockwool core is 2.0 W/(m²K)
The rest of the range is between 1.8 W/(m²K) and 2.2 W/(m²K). Please contact us for more details.