I have purchased a Honeywell HE260A to replace an older drum humidifier. Besides the transformer and the H8908A humidistat that came with the basic unit, do I need to install a current sensing switch or sail switch to make this work? Or do I just need the humidstat? All the instructions are for multiple models (as are the wiring instructions) and it is not clear from them what I need to do to get this to work.

I did not buy the installation kit the Lowe's is selling since I already have the damper & vent hose from my old humidifier