An HVAC system’s energy efficiency is only as good as the engineering firm that monitors and upgrades it. Hemant Mehta’s WM Group must be doing something right because he and his team have been ...

As the cost of components and pumps becomes more affordable, variable speed pumps are being used to increase the efficiency and reliability of water distribution systems in multi-story buildings.

This generation of variable-speed pumps can internally sense how many valves are open or closed and adjust speed accordingly. Variable speed pumps have been around for years. As I mentioned in last ...