Color:

S20 Upgrade Increase Number Thickened No Filter Screen [Applicable to 99% Wall-mounted Air Conditioning]]

S20Q Upgrade Increase Thickening (Activated Carbon Filter) [Applicable to 99% Wall-mounted Air Conditioning]]

S03 foundation without filter screen [for 1-1.5p]]

S03-1 activated carbon filter paragraph [for 1-1.5p]]