If you have spare fridge space in which you can attach a temperature controller to, that would be optimal. If not, see below;
If your house is warmer
Find the coolest spot in your house which is also dry and away from direct sunlight.
- A cupboard or pantry may be the most suitable place.
- Basements or Garages can often be quite cool as well.
Make sure that the temperature does not exceed the levels recommended for the specific yeast or this could lead to unwanted flavours or kill the yeast off completely.
If your house is colder
- You can use a heat pad. This is a simple heated pad which your fermenter can sit on to keep the brew warm. Make sure there's adequate air flow and you don't cover the brew and pad.
- You can try wrapping the fermenter in a blanket - but ensure you don't do this with other electrical heating methods.
Keep an eye on the temperature of the brew. If the temperature is too low the yeast will fall asleep and the beer will not ferment.