A peer-reviewed field study has demonstrated that software-driven controls can allow a standard 120-volt heat-pump water heater to deliver reliable hot water without backup resistance elements, ...

Lee Wallender is a home improvement writer of nearly 20 years and specializes in home remodeling, repair and maintenance. Kristin is a lead editor at Forbes Home and has nearly a decade of ...

In order to service and troubleshoot an air-source heat pump system, a service technician must understand the unit's sequence of operation. This is the order of events the system undergoes to cycle ...