The GrainFather Glycol Chiller GC4 is a must - have for homebrewers who want to take their craft to the next level. Use it in your home brewing setup to accurately control the fermentation temperature of your beer. Whether you're a beginner looking to improve the quality of your brews or an experienced homebrewer aiming for professional - grade results, this chiller is perfect for you. It can cool up to 23 L of wort down to 4ºC and manage up to four conical fermenters simultaneously, each with different fermenting schedules.