Many people will reach for an aquarium pump, after all that represents a readily available and relatively inexpensive source of bubbles. But not [truebassB], instead he built his own air pump from ...

Air-source pumps - the most common type - suck in outdoor air and pass it over tubes containing refrigerant fluids which concentrate and boost the warmth to produce heat. The system consists of a ...

The Italian manufacturer said its new R32 heat pump has a coefficient of performance of up to 5.2 and a heating capacity of ...