Four Pipe Fan Coil Units

Four pipe fan coil units have two 2 supply pipes and two 2 return pipes.

Four pipe fan coil units.

This allows either hot or cold water to enter the unit at any given time. This unique arrangement allows the system to stage on and off to meet the varying demands each day and throughout the year. Four pipe systems have separate heating and cooling fan coil units and separate pipes for heating and cooling. Each half of the unit is sized to meet one half of the heating and cooling load.

In the simplest terms whalen s innoline 50 50 four pipe system unit is the combination of two 2 pipe riser fan coil units. The four pipe hvac system has a number of advantages over a two pipe system. However the amount of dehumidification provided can be limited by increasing the chilled water supply temperature. These fan coils have 2 supply and 2 return pipes that allow hot or cold water to enter the unit at any time.

This means that hot or chilled water is always available so the system can immediately change over from heating to cooling mode. Fan coil units are designed to provide dehumidification of the area served. Two pipe systems have to be manually switched over which is not only inconvenient but time consuming. With its unique ability to stage performance the innoline 50 50 four pipe fan coil system is a game changer.

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