I installed Aprilaire 700 humidifier on my furnace - American Standard Freedom 90 Single Stage but I don't know where I can connect 24V from humidifier control panel in furnace.
I'll appreciate your help.
YP

April air makes a voltage adapter that slips over one of the blower wires and acts like a switch to turn on the humidfier in the heat only position. It comes with instructions.

If your furnace has a HUM terminal, it and Com will give you 24 volts when the blower is running.