Central AC: Fan on continuously or Auto?
Please help resolve an arguement where neither person knows what the heck they're talking about.
If you have central AC, is it best, in terms of keeping the house cool and minimizing how often the compresser kicks on, to leave the fan running continuously, or have it set to Auto so that it only runs if the cooling unit is running?
Also, if you are doing everything to keep from having to run the AC while the humidity is still low enough to do that (close all shades and downstairs windows, vent the attic, stuff like that), is there a cooling benefit to running the central AC's fan continuously?
Finally, we have two systems, one for just the first floor, and one for the 2nd/3rd floors. Does the answer differ according to the location of the system - as in, for example, there's benefit to running the first floor fan continuously but not the 2nd/3rd floor fan?
Thanks for your input!