49 PB
CORRECTION FACTORS
Height Correctiion Factors
Indoor unit
Pipe length L
Height difference H
Outdoor unit
The correction factor is base d on the equivalent piping length in feet (EL ) and the height
between outdoor and indoor units in feet (H).
IMPORTANT: Height correction factor is used BEFORE length correction factor.
Height between indoor unit and outdoor unit (ft).
Position of outdoor unit is higher than position of indoor unit (ft).
Position of outdoor unit is lower than position of indoor unit (ft).
Gas Diameter
(mm/inch)
L:
Large pipe, length between indoor unit and outdoor unit (ft).
EL :
Equivalent one -way piping length between indoor unit and outdoor unit (ft).
90 Elbow 0.15 0.2 0.25 0.35
Cooling
25ft(7.5m ) 32.8ft( 10m ) 49ft(15m )
Piping length correction factor
66ft(20m )
1 0.9 5 0.9 0 0.85
1 0.9 5 0.9 0 0.85
Heating
25ft(7.5m ) 32.8ft( 10m ) 49ft(15m ) 66ft(20m )
one way
90 Degree Bend Additional Feet Chart
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