This article first appeared in Engineered Systems. View the original post in its entirety here. Variable refrigerant flow (VRF) systems were first introduced to the HVAC community in Japan in 1980 as ...

How is variable refrigerant flow (VRF) working for you? We asked a number of people that question and summarized the findings from two typical facilities here. The first case is a new construction, ...

Mitsubishi Electric has launched a new range of its City Multi R32 VRF air conditioning with a host of outstanding features ...

New Hitachi air365 Hybrid system automatically switches between heat pump and furnace operation according to outdoor temperature sensors for a more efficient performance year-round IRVING, Texas, Sept ...

I came across a single-pipe gravity system that had its piping pitched upward from the gravity heat source, just like the two-pipe system These systems do not like the application of a circulator Even ...

A heat pump heats and cools your home, functioning like a combined furnace and central air conditioner. Because they absorb and move heat from the air, heat pumps are exceptionally energy-efficient ...