Rainbow Systems Calgary Sales and Service. Distributors of the World's Greatest Air Purification and Home Cleaning System- The Rainbow SRX. We are the only Authorized Rainbow Sales and Service Center in Calgary and surrounding area. Servicing Central / Southern Alberta and B.C for over 70 years. The Rainbow is often Imitated but never duplicated- beware of imitators, the Rainbow has over 80 years of unprecidented history and reputation in Canada.