Low fin tube forming short fins in tube wall that greatly increase the surface area over smooth tube. The fins are Integral formed into the tube wall so the outside diameter of the fins are not larger than the pre-finned smooth tube.
Bimetal Extruded Fin tube, use base tube insert Aluminium tube, directly extruded the Aluminium into wanted fin specification. Fin and tube surface are tight touch thus improving the heat transfer efficiency. This also give considerable corrosion protection to the base tube.