What is desco plumbing and heating supply? Desco Plumbing and Heating Supply Inc. is a plumbing, heating, air-conditioning and Waterworks systems distributor-wholesaler. This subsidiary has 17 outlets, 3 with a showroom operating under the name of The Water Closet.What can desco services do for you? With a dedicated team of experts, we can repair or install heating, cooling and ventilation systems of any make and model. It doesn’t matter how serious the problem, DESCO Services will find a solution for you.Why choose desco for your commercial cooling needs? DESCO can be on the scene right away to take care of your commercial cooling needs, including the repair or installation of packaged rooftop units, chiller systems, chilled water systems, split systems, any type of forced air system, computer room units, PTAC units and more.When did desco move to peterborough ontario? On August 27, 2004, Desco moves its Peterborough outlet. On October 2, 2006, Desco opens a new outlet in Woodstock, Ontario. On November 24, 2008, Desco moves its Kitchener outlet in new premises.