The BTG...P features a two-stage operation which involves a high or low flame option. Air and gas is mixed in the bast-pipe of the machine. The regulation of combustion air and the blast-pipe lead to a good combustion value. The mixing unit can be removed without disassembling the burner and the boiler, thus facilitating the maintenance of the model.
The model comes in three versions: BTG 3.6 P, BTG 6 P, BTG 11 P. These versions have an overall width that ranges from 410 to 475 mm.