Question: I have an outlet in my attic already wired with 115 vac power. Can I just plug the PCS3 into it?

Answer: Plugging the PCS3 into a standard electrical outlet will cause it to be powered up and run 24/7. Doing this will vent the attic. To accomplish heat transfer, the PCS3 needs to be powered up when the attic is warm and the pool water is turned on. The GL235 solar control controls both the attic power through an internal relay and the pool water through an automated valve. At the very least, the power to the PCS3 should be controlled by a manual switch to operate it manually if automation is not desired.