Have Residential Boiler issues ? In floor radiant heating not working properly ? CALL AN EXPERT - DHL Mechnical is the Boiler and hot water heated flooring experts in Calgary. This is all we do , we dont install toilets , fix drain issues or service hot water tanks , we specialize in complex residential boiler systems in Calgary. Let us fix your boiler or troubleshoot the warm water flooring issues you are having. Let us fix it right the first time and make sure you know exactly whats wrong with it. he brand products we install and replace have been tested for the CSA‘s quality and safety parameters under the harshest climatic conditions. Efficient design, construction, and working mechanism ensure optimum fuel consumption and maximum heating. Our brands include *- IBC *-Super Hot *-NTI *-Buderus *-LAARS *-Lochinvar *-Well-McLain *-Viessman