I've selected the Corsair CS450m as the PSU. I also found a 12V DC 30A 360W Switching Power Supply on eBay for about $54 AUD (I'm not allowed to show the link), but I wouldn't know how to get it to output 15V.
The Peltier Module is rated at as 15V at 8A (Using 60 Watts/h) and the heatsink (Deepcool Ice Blade Pro V2.0) has a 12V fan that uses 3 Watts (0.25A).
I also have a Ultrasonic Mist Maker to help cool the heatsink, through evaporation. Look for a video on YouTube titled: "thermoelectric Peltier TEC cooling with ultrasonic humidifier" to see what I'm talking about.
The mist maker is an AC device, so it'll have to use a wall socket.
The purpose of this, is to create an affordable water chiller for my Hydroponic DWC Reservoir, which needs to be kept under a certain temperature. To do this, do I need to cut the power to the PSU once the water reaches a certain temperature? How does a Temperature Controller turn off the power? Is there a way it can turn off both devices?