During the cooler temperatures the best piece of equipment to own is a Heater Pad. It is a square electronic pad that you place underneath your fermenter. It produces an even constant temperature throughout your fermenter as the heat rises up. Designed specifically to keep your fermentations cozy and warm. Will keep a fermentation going without over-heating the yeast. Provides a low, gentle heat that is even all across the pad. No hot spots. Will heat a wort by 10 to 15 degrees Celsius. Rise in temperature will depend on batch size and room temperature. Effective in rooms as cool as 10 degrees Celsius and above. Works equally well with both plastic and glass fermenters. Inexpensive to run. Only draws 25 watts of electricity. The heating pad is 32cm square and will raise the fermenter by 2,5cm. Molded in high quality, flame retardant plastic.