The new R40 wall mounted boiler incorporates the latest high quality gas heating technology providing maximum efficiencies and minimum environmental impact. With five models ranging from 65 kW to 145 kW, all small commercial requirements can be accommodated, along with larger commercial properties when modules are combined to form the "Modupak", where outputs up to 1,140 kW are achievable. The Modupak is a frame mounted combination of up to 8 boiler modules in a back-to-back configuration, or up to 6 boiler modules as an in line formation, supplied as a complete package including boilers, pumps, pipe work and valves, header, dirt and air separator, manifolds, insulation, flues and control system.