19.  INSTALLATION OF FRESH AIR INTAKE DUCT FOR DUCTED  
       INDOOR UNIT – MEDIUM STATIC PRESSURE  
 
The ducted indoor unit - medium static pressure is fitted with a built-in fresh air 
intake knock out panel ( from both sides ) that can be utilized to introduce fresh air 
into the room.  
This helps prevent the building of stale air and enhances air quality in working 
environments and enclosed applications without natural fresh air supply. 
 
Location of fresh intake air knock out : 
 
   Duct joint for fresh air intake duct            Ducted Indoor unit 
 
 
 
Dimensions of fresh air intake knock out : 
Ducted Indoor Unit Model 
42KDMT 12 – 18 – 24K  42KDMT 30 – 36