a. introducing the circulation air at a first volume flow and intake temperature level above 0° C. to a main condenser with at least one main condensation chamber;

b. gradually cooling the circulation air to a main temperature level of 0° C. or less inside the main condensation chamber;

c. splitting the volume flow of the circulation air into a high volume re-circulating flow and low volume off-gas side stream after reaching a second temperature level; and

d. providing the high-volume re-circulating flow to a circulation air intake of a dryer,

the method further comprising providing a condenser to cool the circulation air according to step b), which comprises at least one cooling coil containing a cooling medium, and whereby the cooling medium enters the cooling coil at a far end side of a circulation air entry with entry temperature of 0° C. or less and is heated while traveling through the cooing coil in a counter-flow direction to the circulation air, the cooling coil having coil tube and finned surface and

wherein the rate of cooling is maintained at less than 0.30 C degrees per millisecond, while the gas flow travels the distance between the condensing coil tubes and finned surfaces.