A heat pump functions as a typical air conditioning system in the cooling mode — absorbing heat from indoors and rejecting it outdoors. In heating mode, the coils reverse their functions. The outdoor ...

The compact electric hydraulic actuator (EHA) from Parker Hannifin’s Oildyne Div., New Hope, Minn. (www.parker.com), combines all the traditional components of an electrohydraulic linear actuator in a ...