Where to get Custom size Air Filters Canada??

I have a panasonic IB200 ERV the filters are extremely expensive 140$ cadAnyone know a good place online to get custom? I saw one airfiltration.ca but not sure if they… I have a panasonic IB200 ERV the filters are extremely expensive 140$ cadAnyone know a good place online to get custom? I saw one airfiltration.ca but not sure if they…Read MoreGreenBuildingAdvisor