Use a stud finder and pencil to locate and mark the studs in your wall. You want to attach the baseboard backings to the studs for a secure fitting.
Place the Slant Fin baseboard units around the room in the areas where you want to install them. The bottom of each unit should be 3 inches off a bare floor and 4 inches up from a carpeted floor.
Use a copper tube cutter to cut 3- or 4-inch pieces of copper heat-loop risers for each baseboard unit.
Remove the backing from the baseboard units. Hammer 10d penny nails through the backings to the wall where the studs are located, inserting a nail into every two studs.
Insert the copper heating elements into the baseboard backings. Solder the copper couplings and elbow fittings to connect each element with the soldering iron and solder. Solder the end of the copper tubing to the boiler outlet.
Clip the covers and end caps onto the baseboard backings.
Turn on the boiler so water flows into the heating elements. Check for leaks.