Whole-House Fan and Attic Temperature

A year or so ago we installed an Airscape whole-house fan. The fan is supposed to provide cooling to the house in two ways:

1. Pulling cool air from the outside into the living area, replacing the air in the house as well as cooling the interior structure of the house.
2. Displacing the highly heated air in the attic with cooler air from the outside (via the house).

We've been very happy with the cooling the fan provides to the living area of the house but we've had to simply assume that the fan was adequately cooling the attic.

Until now.

With the installation of my super-nerdy temperature measurement system, we now have proof that the fan is doing its job. Last night we turned it on as we we're going to bed, knowing the overnight lows would be cool enough to provide benefit. Looking at the graph, you can see around 10pm when the fan turns on the attic temperature (green) drops pretty quickly.

Nice the see our assumptions were correct.