How can I keep my southern facing bedroom cool in the Arizona Heat?
The 1 time I used an in-line fan as you are suggesting it made more noise than it was worth. It produced very little increase in air flow.
I would have an HVAC company look at your problem to see if there was a simple fix or as the others have said plant trees, and some type of shading or add a separate cooling device. Since you are in Arizona, could you add a &quot;swamp cooler&quot; just for that room?