- A TWINTECH specialist can come out to your home – assess whether it’s right for a tankless heater – and get you started down the road to a more energy efficient and cost-effective future full of warm baths and hot showers. br br Twintech Heating and Cooling br 4-1550 Kingston Rd,Suite 1342 br Pickering, Ontario, L1V 6W9 br Tel No.: 1.844.894.6832 br Toll Free No: 1-800-668-5439 br Business Email Id: grant@twintechheating.