• Header cylindrical (condenser) header 가정: - SA (m2) = (2 x 3.14 x R(반경) header(m)) x length of header (m) x 2 headers Assuming it is a radiator header - SA (m2) =header length (m) x header width (m) x 2 (sides/header) x 2 (headers) • Tubes -SA(m2) = tube width (m) xtube length (m) x 2 (sides/tube) x total number of tubes • Fins - Ignore the louvers (방열공) in the fins - SA (m2) = fin width (m) x..