Profile: Diffusion Environmental Systems manufactures and designs heating & ventilating products. We are an ISO 9001:2008 and ISO 14001:2004 certified company. Our products include fan coils and heaters. Our fan coils include air side fan coils and water side fan coils. They are classified into Highline, Lowline and Slimline. Our Highline 260i is the water side fan coil. This is the versatile range of ceiling mounted fan coil units which is available in air side and water side, having specific fan powers as low as 0.4w/l/s when fitted with AC motors. Our Slimline range of fan coil units can be accommodated within virtually any ceiling or floor void with an extremely low noise level, are equally suitable for new or refurbishment projects. Our Lowline wall mounted fan coil is available in air side and waterside controls, and can be supplied with various room cases. We offer ACE electric over door heater which is both compact and robust in design, making it the ideal choice for smaller applications. The unit is available in 3 or 6 KW versions, and can be mounted at heights of up to 2.5m. We provide ZH electric heater for space or spot heating in applications such as offices, retail shops, banks, restaurants, schools, hospitals, and hotels.