The BrewJacket Immersion Pro allows you to create world class ales and lagers without a refrigerator and thermostat setup. Just set the temp!
Achieve up to 35ºF above or below ambient and hold that temp to 0.3º F with Immersion Pro's patented solid state heat exchange system. No pumps, no glycol, no coolers of ice water. Simple. Insulated jacket is included! The thick jacket gives your fermenter an insulation factor comparable to a refrigerator. It also blocks light.
Watch a demonstration at https://www.youtube.com/watch?v=hu9vMDb7OwU