Sierra coils are made with copper pipes featuring the following outer diameters:
5 mm
| 7 mm
| 7,94 mm (5/16")
| 9,52 mm (3/8")
The inside of the copper pipes can be smooth or ribbed.
The available geometries (tube spacing) x (row spacing) are:
20 x 17,32 mm
| 21 x 12,7 mm
| 25 x 12,5 mm
| 25 x 19 mm
| 25 x 21,65 mm
| 25 x 25 mm
The fins can be made of aluminium (with special surface finishing on request) or copper, with the following shapes:
flat
| corrugated
| louver
The frame can be made of:
galvanised steel
| aluminium
| aluminium alloys
The coils can be supplied with the following finned block:
flat
| L bend
| U bend
| round