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Zertifikate

PEJ self-proclaimed commitment to quality.
ISO9001 certificate in Japanese.
ISO9001 certificate in English.
Heat storage element patent.
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 fan unit invention.
Japan Builders Network member certificate.