Grayson Thermal Systems design, manufacture and supply OE and aftermarket heating and cooling products for buses and coaches, specialist off-road vehicles and commercial vehicle industries worldwide. We are also responsible for the sales, installation and servicing of Thermo King vehicle air conditioning systems to the bus and coach industry throughout the UK. From our manufacturing sites in Birmingham, UK and Indiana, USA, we serve customers right around the globe including Europe, China, USA, Canada, and New Zealand. Grayson works in partnership with our customers to develop innovative ways for them to improve vehicle performance and reliability and reduce costs so that they can maintain their competitive edge.