In an improved system for recovering heat from a combustion gas produced by burning wastes, the combustion gas or combustible gas produced by partial burning of the wastes subjected to dust filtration in a temperature range of 450-650 C. The elongate channel member is of a metal having thermal expansion properties that are similar to thermal expansion properties of silicon. Under selected conditions the at least one idler bears at least some weight of the track vehicle to rigidify the track vehicle suspension during such selected conditions. Alternatively or additionally, receive circuitry of the NFC communicator may be coupled to only a proportion of the antenna coil to reduce the voltage to which circuitry of the NFC, communicator is subjected by a received RF H field. In addition, the pump purge system accumulates liquid odorant which is a byproduct of the purging process and stores it in a tank to reduce the likelihood of improper disposal. The destination device may be a service provided by such network or it may be another RCP.