Energy Saving Products Ltd. has been manufacturing Hi-Velocity Small Diameter duct systems since 1983.The Hi-Velocity System is an energy efficient high pressure air delivery system that can be designed to provide heating, cooling, filtration, ventilation, humidification and dehumidification. It is quite different than a conventional furnace, the main difference being that the supply duct work is all "small diameter" or "mini duct". This makes it very easy to install inside existing walls with minimal remodelling. The flex duct fits inside a typical framed wall without having to disturb the drywall. Our fan coil is modular and fits easily in mechanical rooms, closets, attics, crawlspaces, anywhere! The small footprint makes it the right choice for both new construction and retrofits.