I.T.S.L. was incorporated in January of 1986. Since then we have dedicated ourselves to provide state of the art HVAC balancing, commissioning and maintenance manual services to the construction industry throughout the B.C. interior. Owner Henry Pejril is a...Durell Control Systems is in its 21st year of business; with substantial growth in the past 6 years. Durell concentrates on Direct Digital Control of Heating Ventilating & Air -Conditioning with an emphasis on Energy Management. Our Services...Building Knowledge was incorporated in Ontario on December 1, 1986, with Gord and Linda Cooke as Principals, and acted primarily as a sales agency in the HVAC industry specializing in ventilation products. Our primary line was, and continues to be vanEE Heat Recovery... QPS Heating and Cooling is devoted to ensuring your customer experience and home comfort is perfect! From your initial estimate, to the installation and beyond we want to ensure that you are 100% comfortable. Our heating and cooling systems will ensure your home... AC Montreal Inc is determined to be one of Montreal’s leading residential air conditioning and heating systems contractors for its quality work. We individualized in marketing, installing and servicing best quality air conditioning and heating equipments.