Greatstone International Ltd. (GSI), is a quality driven, global sourcing company founded by a group of HVAC engineers having more than 60 years combined experience in the HVACR industry. We have a solid understanding of HVACR manufacturing needs.

With our headquarters in Ontario, Canada and branch office located in Shenzhen, China, GSI proudly offers a worry-free procurement process guaranteeing you quality products at competitive prices - delivered to you on time.