Duct Cleaning Servicing Areas in Ontario BlueGuard is proudly servicing the following provinces Ontario Markham Scarborough Oshawa Peterborough Port Perry Courtice New Castle Port Hope Cobourg Belleville Napanee Kingston Brockville Cornwall Ottawa Pickering Ajax Please, contact us if you don’t see your city/region in the list. We try our best to provide service in every region. CALL us Contact Us