A method and apparatus for draining a liner-type medical suction apparatus. A sub ink tank is provided above the head. A thermoelectric cooler for cooling a driver worn device including a thermoelectric cooler having a first heat exchanger, an inlet for supplying one side of the first heat exchanger, and an inlet for air supplying an opposing side of the first heat exchanger. An amount of flue gas is recovered and transferred to provide a secondary heat source to the one or more indirect fired kilns. In certain aspects, methods of the invention involve transmitting light through a filter and passing a portion of the filtered light through a gain chip assembly at least two times before that portion of light passes again through the filter.