Certificates
PEJ commitment to quality (Japanese)

ISO9001 certificate (Japanese)

ISO9001 certificate (English)

Patent of a ventilation unit with heat exchanger (Japanese)

Seseragi trademark registration

Seseragi α trademark registration

Gauss Fan trademark registration

PEJ super ventilation trademark registration

PEJ ventilation trademark registration

Breathing type ventilation trademark registration

European patent of a fan unit invention

Certificate of membership | Japan Builders Network

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