I live in Kimberley and as you all know it gets pretty hot over here. I had quite a struggle with high temps untill I fitted two fans(240v PC Server Fans) on the back of my canopy, one blowing the other extracting. It dropped my temprature with +-4.8 degrees in summer. So ja, I would first use a fan and if that doesn't work, go the chiller route!
The Halea is a good make Mekaeel, with excellent back up service (They replaced mine within a day) but it seems they had problems with the heating/cooling one as it is discontinued according to the importer