Most brewers find it easier to keep warm (with insulation) rather than cooling their brew because the brew generates heat as it ferments.

Non-electrical temperature control

  • Wrap the fermenting tub in a 0ºC-5ºC rated sleeping bag , blankets or an old jacket.
  • Place the fermenter in a large esky, insulated box, non-working fridge or freezer.
  • Sit the fermenting tub in a laundry tub with frozen PET bottles.
  • Place the fermenter in a cellar or on a cool bare concrete floor.
  • Partially roll a towel and place in the lid of the fermenter, fill the well of the lid with cold water and drape the towel over the side of the fermenter allowing the water to wick down the towel.

Electrical temperature control

  • Heat pad or heat belt.
  • Tea chest, box, cupboard, old fridge etc. with a 25W-40W incandescent lamp controlled by a thermostat, dimmer switch or timer switch.
  • Place in an air-conditioned room.
  • Place in a working fridge or freezer with modified thermostat.
  • Place near an inside storage hot water system.
  • Wet towel method with an electric fan blowing over it.