Fermentation Heater Carboy Warmer - Kombucha Heating Wrap with Thermostat for Temperature Control - Electric Heat Pad Belt for Home Fermenting & Brewing - Fits Most Fermenter Vessels 2 to 8 Gallons

This was a game changer for me for brewing.. In the winter, the space I ferment in tends to get on the cooler side, 45-60F(7-15.5C) and higher ABV ferments even with the right yeast can stall out. The jacket was a perfect size for a 6 Gal carboy with a small gap. They provide two straps for holding it onto the carboy. If you tuck the thermocouple into the strap, away from the wrap in the gap, it measures the temp just fine. It's not necessary to use a through cork probe.I did Wrap the whole carboy in a blanket for temp control, the wrap is only 45 watts, so in a really cold space, it was struggling to keep the temp at 70F(21C), I wrapped the whole fermentor with a blanket, it was set to 70F and held 70F with only minor cycling in a brewing space that was 50F. Sped up the fermentation quite a bit, and the tastes are good so far on my brew...

I love this wrapped heater for my beer fermenter carboy! Simple to set & I love the bright display showing me the current temp of my beer (outside thermostat taped mid carboy in gap between heating sheet ends). I'm using 6 gallon polycarbonate carboys and the heating sheet almost wraps completely around. I've swapped out the fabric elastic bands with silicone bands for cleaning purposes. After using this the first time, I immediately ordered a second unit.

I needed to wrap my carboy in a quilted shirt at first to get from 55 to 70 degrees, but after that it’s been great. Maintains temperature +/- 2 degrees F and seems to agree closely with other thermometers.

I required a heating mat that I could wrap around a 3-gallon kombucha brewing vessel. The vessel is basically a glass cylinder with no tapering and a stainless steel spigot at the bottom. It's 15" tall and 29" around, so the 11"x32" mat size wraps around it with just a little overlap. It sits just above the spigot, but with a couple inches to spare on top for the rubber band that holds the cloth over the top in place.I will say that the rubber bands that came with the heater don't work for much besides storing the mat in a rolled position. I needed a much larger band to wrap around my container. Since this mat is designed for up to 8 gallons, I'm not really sure what they meant by using the included rubber bands to keep the heater wrapped around the vessel. The included bands would struggle with a gallon jug, and the mat is far too large for that size.Another point to note is that the probe should be placed UNDER the heating mat. I attached the probe via the suction cup a position just below the mat, and secured it (to ensure direct contact) with a small piece of masking tape. The thermostat registered 80 degrees, but a check of the liquid temperature indicated 100 degrees. Yikes! I repositioned the probe to underneath the heating mat and let the temperature settle, and that resulted in a very accurate temperature of the liquid/thermostat. I set the thermostat to 78 degrees. When it dips a tenth of a degree below 78, the heater kicks on. When the temp reaches 79, the heater turns off, but the temperature continues to rise to mid-tenth degrees before it starts to drop back, keeping my kombucha in that 78-80 degree sweet spot.I'm very happy with this heater so far. The mat is thin, not at all bulky, but sturdy. The cords are heavy-duty and of sufficient length. The thermostat is easy to use and very accurate (provided it's place correctly, lol). It's definitely a critical component of my continuous brew kombucha setup.

I like these heaters. This was very handy in the winter months.

Practical warmer now new works perfect fits my fermentation pot

I'm using this as a heat wrap for brewing kombucha and it works great. Just set a temp and forget it. It consistently keeps my fermentor (I use a 3gal glass jar) within about a degree of set temp which is usually about 8 -10 degrees over room temp in my house. This was a must going into winter and it kept me in the zone even when the house gets chilly. I've checked it against multiple thermometers and mine runs accurate enough for my needs (about +/- 1 degree F).

I am making some blackberry wine. I have my carboy setting in a cold area of the house. This keeps the wine at the right temperature for letting the wine finish fermenting.