I live in a 1200 sq ft home in central Arizona. Temps are aprox 10 degree less (both summer and winter) than metro Phoenix, humidity low except July and August. House has ducts with central gas furnace and evap cooler, never had AC.

Wanted to get AC for those 2 (July. August) humid months. Cost of adding cental AC about $2200. Was considering just putting in 2 window units for $250 each. Certainly cheaper and less hassle than central AC.

I know 2 window units will give me enough cooling capacity, would the central furnace fan on continuous low speed be effective circulating window unit cool air? Or am I just wasting my time considering 2 window units--just get the central AC option?

Get the window A/C if you want to save $$. Actually running the furnace blower will circulate air will work but usually not necessary.