Humidity removal

[smokinreefer]

Originally Posted by msjboy

Princess Auto has a Danby dehumidifier for up to 4500 sq ft space for just $199..(refurb)...in latest flyer. You have to empty the water every now and then of course.

just looked at this, i dont get how would this work for 4500sf?
to me i would think to service 4500sf it would need to be inline with the hvac?

or would it actually work passively? like it removes moisture from the air in one room which effectively lowers the overall moisture level in the house as moisture from throughout moves around until all the air is the same level?