Central Fan Integrated Supply Ventilation System

Manual balancing damper in the outside air duct allows adjustment of the flow rate.

Central fan integrated supply ventilation system.

One example of a ventilation system design is a central fan integrated supply cfis system which is made up of a 6 inch outdoor air intake duct connected to the return side of the air handler with a fan cycling control to make sure the fan runs a programmed minimum amount of time. Fan cycling and ventilation damper cycling. Central fan integrated supply ventilation with available continuous bathroom exhaust and with integrated dehumidifier. This type of system is called central fan integrated supply cfis ventilation.

A duct is run between the return plenum and outdoors and cfis controllers are programmed to turn on the air handler fan and open the motorized damper. Report about ventilation system design including central fan integrated supply cfis system made up of a 6 inch outdoor air intake duct connected to the return side of the air handler with a fan cycling control to make sure the fan runs a programmed minimum amount of time. The fancycler controls the furnace fan as well as a motorized damper installed on the 6 in. It s tricky but it can work well if designed installed and commissioned properly.

The simplest most effective and most economical way to introduce fresh air in homes with central forced air systems is to use the central fan to pull in and distribute a controlled amount of outside air. Passive fresh air intake duct preventing both overventilation and underventilation. The air movement innovators. Outside air intake through sidewall via angled fur down in a closet going through a gable end is just as good but avoid going through the roof.

Central fan integrated system. Central fan integrated supply cfis systems make use of an existing forced air heating or cooling system. Without those other components though it s just extra duct leakage and air leakage that will rarely provide the right amount of ventilation air.