Some of us have to heat our conicals during the long Winter months and Spike has a solution. Each conical has its own sized heater and the wattage of each is carefully designed to match it. Spike also 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 beer).
Spike's heater attaches to their insulated conical jacket via Velcro. It rests on the bottom cone section of the conical where the coldest liquid is. This will give the most even temperature throughout your fermenter.
-Different wattages for each fermenter (ranging from 80w to 150w)
-Built in 90F thermostat to prevent the heater from overheating your wort
-5' long cord
Detailed TC-100 product guide: