U-5
CHAPTER 1
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Ventilation for Healthy Living
1) System operation with cassette-type indoor units of air conditioner
2) System operation with ceiling embedded-type indoor units of air conditioner
3)
Independent operation with ceiling suspended-type indoor units of air conditioner
3. Ventilation Method
3.1 Comparing of Ventilation Methods
There are two main types of ventilation methods.
Centralized Ventilation Method
Mainly used in large buildings, with the ventilation air intake being installed in one machine room. For this method, primary
treatment of the ventilation air, such as energy recovery to the intake air and dust removal, is performed via distribution to the
building by ducts.
Independent Zoned Ventilation Method
Mainly used in small to medium sized buildings, with areas being ventilated using ventilation air intake via independent
ventilation devices. The use of this method has recently increased as independent control is becoming more feasible.
Centralized Ventilation Method Independent Zoned Ventilation Method
Air intake
(ventilation
air)
Filters
Air exhaust
(stale air)
Cassette-type indoor units of
air conditioner or fan coil unit
Cassette-type or ceiling
suspended-type indoor units of
air conditioner or fan coil unit
Exhaust grill
Ceiling recessed-
type Lossnay
Exhaust air
Ventilation air
Finished ceiling
Exhaust air
Ventilation air
Finished ceiling
Lossnay
Supply fan
Exhaust
Each unit
Ceiling embedded-type indoor units
of air conditioner or fan coil unit
Ceiling recessed-
type Lossnay
Exhaust grill
Exhaust air
Ventilation air
Finished ceiling
Ceiling recessed-
type Lossnay
Exhaust grill
Supply grill
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