Abstract: A modular thermoelectric cooling/heating unit is installed through an opening in a wall separating first and second temperature zones. This modular thermoelectric cooling/heating unit comprises a thermoelectric device including a cold surface, a hot surface, and a cooling/heating member between an electrical power supply and the cold and hot surfaces. A heat conducting block has a proximal end for thermally contacting with a first one of the cold and hot surfaces, and a distal end. A first heatsink thermally contacts with a second one of the cold and hot surfaces, a second heatsink thermally contacts with the distal end of the heat conducting block, and a thermally insulated housing covers at least a portion of the heat conducting block between the proximal and distal ends of this block.

Abstract: An improved forage blower having a small first stage paddle wheel type impeller or ventilator feeding a large conventionally sized second stage paddle wheel type impeller or ventilator via a short duct for transferring forage from the first stage ventilator to the second stage ventilator, the arrangement being such as to maintain the duct as short as conveniently possible to reduce loss of forage speed from the first stage ventilator to the second stage ventilator. The shafts of both ventilators are spaced apart and parallel, extending horizontally from a main power input for connection with a suitable motor such as the power take off of a farm tractor.