-Indirect fired heaters -Double steel panels for thermo-acoustic insulation -Stainless steel combustion chamber operating with flame inversion system -Highly efficient heat exchanger with inspection hatch and stainless steel vanes -Sealed electrical control panel with protections -Function selector 3 positions: fan only / stop / heating + fan -Automatic burners with high pressure fuel pump and fuel filter with simply cleaning cartridge without replacement -High pressure centrifugal fan installed on silent blocks -Control fan thermostat -Overheating thermostat -360° pivoting air outlet with adjustable horizontal deflectors -4 way air outlet plenum available ( optional ) -Power supply in 230 V single phase Vertical warm air heaters with fuel burner