Bob and Tim are on a service call on a really cold and blustery day. The temperature is 27°F, the wind is blowing, and it’s snowing and sleeting. When the customer called, she said that their home is getting cool inside, and their heat pump is running all the time with the temperature dropping inside the house. They arrived at the front door, talked to the homeowner, and decided to look around. They went to the closet where the indoor unit for the heat pump was located and determined that the heat pump itself was not running, only the fan and strip heat. 

This course explains the benefits of combining modern air-to-water heat pumps with state-of-the-art hydronic delivery systems that provide space heating, cooling, and domestic water heating in both residential and commercial applications.

The system combines variable refrigerant flow (VRF) along with a closet-mounted single packaged unit.

These four-way reversing valves cover 93- and 119-ton applications and are suitable for 1- to 119-ton cooling capacities. They allow heat pump systems to switch between cooling and heating modes by changing the flow path of the refrigerant.

Energy Star certification is an important distinction HVAC manufacturers aim for their products to achieve. The designation recognizes highly efficient performance, and 2016’s list of the most efficient central air conditioners and heat pumps delivers a bevy of products from a wide range of manufacturers.

A groundbreaking district heating scheme in Finland has harnessed waste heat generated by a computer center to heat homes. The project uses an advanced heat pump system based on high-performance Bitzer compressors.