Air-conditioning, air cooling and ventilation apparatus and instruments; Coils as parts of distilling, heating or cooling installations; Energy recovery ventilators; Heat pipes to cool heat producing components; Heat sinks for use in heating, cooling and ventilating apparatus; Heating systems composed primarily of tubes, pipes and manifolds through which warm or high temperature water circulates; Heating systems composed primarily of tubes, pipes and pre-assembled manifolds through which cold or low temperature water circulates; Water distillation units; Water distilling units; Drying apparatus for use in heating, ventilation systems, air conditioning systems and refrigeration systems