BREW BELT HEATER via William’s Brewing. From product page: “This simple low wattage (15 watts) heater puts heat only where you want it. Straps it around any plastic (not glass) fermenter of 5-7 gallon capacity, and it will keep your beer or wine at least 10° warmer than the surrounding air. Does not fit 3 gallon carboys. Much more efficient than trying to heat a room to keep your ferment going. Caution: this heater is not an immersion heater, and is not designed to be used immersed or in wet environments.”
Use in conjunction with a temperature controller to dial in fermentation temps.
As of this posting, William’s Brewing has this marked down to $24.99 as part of their Year End Clearance Sale. Check site for up to the minute price and availability.
Visit William’s Brewing – Web Only Clearance Sale