Certification Due to the constant effort of Delair into improving our product, and delivering you with the best quality products, we have received several important Certification levels, assuring you of only the delivery of high quality products. Click Here for the BVQI ISO 9001 Certificate. Click Here for the PED 97/23/EC (Module D/D1 & H/H1) Certificate. Click Here for the Stek Certificate. Click Here for the PED VCA Certificate.