Four Pipe Fan Coil Units

Two pipe systems have to be manually switched over which is not only inconvenient but time consuming.

Four pipe fan coil units.

Each half of the unit is sized to meet one half of the heating and cooling load. This unique arrangement allows the system to stage on and off to meet the varying demands each day and throughout the year. This means that hot or chilled water is always available so the system can immediately change over from heating to cooling mode. However the amount of dehumidification provided can be limited by increasing the chilled water supply temperature.

Since it is often necessary to heat and cool different areas of a building at the same time due to differences in internal heat loss or heat gains the four pipe fan coil unit is most commonly used. The four pipe hvac system has a number of advantages over a two pipe system. On the contrary in four pipe fan coil systems there is the ability some rooms of a building to be heated and others to be cooled depending on the orientation and the needs of each area of the building. Fan coil units are designed to provide dehumidification of the area served.

Four pipe systems have separate heating and cooling fan coil units and separate pipes for heating and cooling. With its unique ability to stage performance the innoline 50 50 four pipe fan coil system is a game changer. These fan coils have 2 supply and 2 return pipes that allow hot or cold water to enter the unit at any time. This allows either hot or cold water to enter the unit at any given time.

A four pipe fan coil unit consists of a fan chilled water cooling coil hot water heating coil and air filter.