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van Osch and Company supplies Passive House certified OPTIWIN windows and doors to Eastern Canada.  OPTIWIN by Freisinger, is an Austrian based company producing wood framed windows and doors that are unmatched in energy efficiency, beauty, comfort and thermal performance.


All OPTIWIN windows are triple glazed and double sealed creating energy performance ratings usually associated with petrochemical based products such as vinyl and fibreglass but with the beauty and sustainability of wood.

Click here to visit OPTIWIN.

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