Researchers at the University of Zaragoza in Spain have proposed a new design for energy systems based on photovoltaic-thermal (PVT) panels integrated with an air-to-water heat pump via thermal ...

For the North Vietnamese, the S-75 was more than a weapon—it was a symbol of their ability to adapt and resist despite ...

American Air Systems Inc. is launching the seventh annual #AmerAirCares campaign to provide a new heating and cooling system ...