Some will have to heat their FLEX during the long winter months and Spike has the solution. The FLEX heater was carefully engineered to match the heating needs to maintain set temperatures even in the coldest winter garage. Spike uses a built in thermostat which stops the heater from getting too warm. This means you get a gentle warming action when your beer drops below your desired temp (opposed to rapid heating which can overshoot or 'cook' your wort).
The Spike heater attaches to their insulated FLEX jacket
via Velcro. It is positioned near the bottom cone section of the fermenter where the coldest liquid is. This will give the most even temperature throughout your fermenter.
-Built in 90F thermostat to prevent the heater from overheating your wort
-80 watts of power
-Durable silicone construction
-5' long cord
Detailed TC-100 product guide: