Hotbox This fully independant wall mounted electric boiler uses the latest Halogen technology to economically drive a sealed wet radiator system. Key features -Meets building regulations for conventional wet systems -No heat loss through the flue so all energy used is converted into heat -No legal obligation for annual maintenance checks -Sealed system with no aggressive water prolonging bulb life -Quiet operation when used on sealed system -Can be connected to any type or make of wet radiator -No noxious gases are emitted Gives 60-70ºC heat to radiators at 0ºC outside temperature -Easily exchangeable Halogen elements keep maintenence cost low