Stick that "current sensing relay" around the low speed blower motor lead
instead of the common wire. That way it will allow the humidifier to run
while in "heat" mode but not in "cool" mode. Assumes OP has central air, as
well.
"Red Neckerson" wrote in message
news:EY%kd.1253$fc.212@trnddc06...

"TURTLE" wrote
"nospamplease" wrote in message
...
I bought the AirKing rotating drum type humidifier from home depot and
installed it on my furnace today, however, something I found it's very
stupid by design. I set the % humidity to my desired percentage.
However,
the humidifier is on even the heat is not on, the drum keeps rotating
all
the time. It's waste of my electricity.

Is it possible to install a device that detects air flow, then turns it
on??
is there such as device? Help... please..

This is Turtle.

Yes there is a switch for this. It is called a Sall switch. It sticks
out
in the duct and will lift up and turn on anything you want while the air
is moving. then when it stops the sall switch will cut it off.

Now you can use a isolation relay to do the same thing. It's nothing to
set up.

(Turtle meant to say SAIL switch)

There is also a current sensing relay that is wrapped around the common
wire
of the fan.

I can tell you though: Even if than little 24 volt motor (on the
humidifier)
ran all day, it would probably use 1 ir 2 cents worth of electricity.....