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FermWrap Fermentation Heater

FermWrap Fermentation Heater

In Stock
60 day no hassle return policy. Details

Keep your yeast happy and your ferment warm during those cold winter months with this flexible heater wrap! Don't be fooled by imitators and cheap knock-offs, this is the original FermWrap that has been produced by Fermentap for over a decade. Unlike those old heater belts, the FermWrap covers a wide area of your carboy or fermentation vessel, promoting an even heat distribution. Using tape to adhere, the FermWrap can be attached directly to your fermenter, or can be used to heat the space in a box (or refrigerator) that the fermenter is in. Depending on your configuration and insulation, you can increase the temperature of your ferment from 5-20°F. This differential can be increased by using the BrewBuilt™ Neoprene Carboy Sleeve.

With 40 watts of heat spread over almost two square feet, it provides gentle, even heating.

For more precise results, we recommend a temp controller and carboy thermowell. The controller will monitor the fermentation temp and only power on the FermWrap if the temperature drops below your set point. For the ultimate level of control, we recommend pairing it with the BrewBuilt CoolStix™ to provide cooling. With both accessories plugged into the temp controller, you'll get cooling or heating whenever you need it.


  • 40 watts
  • 115V
  • 11" H x 25" W
Item does not include carboy as pictured.
Item # FE650
Shipping Eligible for Free Shipping Program
Availability California - In Stock
Pennsylvania - In Stock
Weight 0.25 LBS
Community Q&A

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Browse 6 questions Browse 6 questions and 65 answers
Why did you choose this?
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I'm fermenting in two carboy and only have one fermwraap. And it's 62 degrees in my shop
Don F on Mar 17, 2020
A second position in my W1209 controlled lagering chamber
Kevin M on Mar 6, 2020
I'm fermenting in two carboy and only have one fermwraap. And it's 62 degrees in my shop
Don F on Mar 17, 2020
balls are in my stomach figured the yeast feels the same way
Valued C on Mar 16, 2020
A second position in my W1209 controlled lagering chamber
Kevin M on Mar 6, 2020
Need to warm Chardonnay for MLF
Ed W on Mar 3, 2020
turning fridge into temp controlled ferment box
Aron Thomas M on Feb 15, 2020
best option in my opinion to use in a chest freezer for temp control during the winter months
Chris E on Feb 11, 2020
A gift
Nancy H on Jan 30, 2020
Old one stopped working
Mark B on Jan 22, 2020
Warm up fermentation in winter to 70-72°
Zach B on Jan 11, 2020
for the cold season
David O on Jan 4, 2020
The one on my MoreBeer Ultimate Temperature Control conical fermenter failed.
RICHARD G on Jan 4, 2020
Heating my chronical fermentor
Robert Rimar` on Jan 3, 2020
Because I make cider with kveik
Matt L on Jan 3, 2020
Replacing other heat source
Ronald S on Jan 1, 2020
To warm up the area that i ferment my wine
jonathan l on Dec 31, 2019
CYNTHIA W H on Dec 18, 2019
cost efficient way to hold fermentation at warmer temperatures!
Timothy L on Dec 11, 2019
Jaime L on Dec 5, 2019
to keep temp in right range
Delfim S on Dec 4, 2019
Upgrading my brewing game!
Herminio A on Dec 1, 2019
Good Reviews
Dave C on Nov 23, 2019
Old heater didn't work.
JOHN A HILLIARD J on Nov 21, 2019
Well rated
Steve C on Nov 16, 2019
Derek E on Nov 9, 2019
I need one
frank p on Nov 8, 2019
Better temperature control
Luis H on Nov 1, 2019
wide enough for my purpose
Gildardo O on Oct 24, 2019
The weather's changing and I need heat instead of cooling!
John S on Oct 22, 2019
It's hot!
Jeff C on Oct 2, 2019
Affordable way to increase fermentation temperature
Kevin Dyson on Oct 2, 2019
Want to heat wine during fermentation
Dan A on Sep 14, 2019
To heat fermentation
Valued C on Sep 12, 2019
Going to use with Kveik yeast
Nancy K on Aug 28, 2019
trying it out on a small conical
Stetsen M on Jul 29, 2019
to ferment at a higher temp
Valued C on Jul 2, 2019
Good price and free shipping
David on Jun 18, 2019
Better quality and safer than the quartz heater I currently use to control fermentation in my fermentation chamber.
JC on Jun 17, 2019
My 15W belt doesn’t cut it.
Brett Binns on Jun 11, 2019
Need to bring heat up higher than the heating pad can do.
mfricovsky on May 8, 2019
I've owned some in the past and they did everything I wanted
Natasha G on May 1, 2019
temp control during fermentation
Daniel Weaver on Apr 26, 2019
Have a heat mat in a fermentation chamber but want a heat source directly on the fermenter for better control
Jeff W on Apr 4, 2019
I need something to keep my wort at optimal temps during the winter months
ROBERT Z on Mar 21, 2019
to control the hot side of my fermentation
Sarah B on Mar 19, 2019
Reasonably priced and recommended on beertalk forums for temp controlled fermentation chest freezer setup
Emerson K on Mar 18, 2019
exactly what I need, making wine in a basement temperature that needs to be at least 6-8 degrees warmer.
Ronald B on Feb 16, 2019
its cold and my beers are not fermenting
Linus P on Feb 13, 2019
Temperature control more precise
Valued C on Jan 23, 2019
Try it on 6 gallon bucket
John on Jan 18, 2019
My basement temperature stays at 64 degrees in the winter and I wanted to ferment at a little higher temp.
APRIL N on Jan 18, 2019
balls are in my stomach figured the yeast feels the same way
Valued C on Mar 16, 2020
Need to warm Chardonnay for MLF
Ed W on Mar 3, 2020
Can this be used on a Fermentasaurus without damaging it?
Preston Hanson on Sep 19, 2018
The FermWrap™ Heater
The FermWrap™ Heater
Fermentasaurus Conical Fermenter - 9.25G/35L
Fermentasaurus Conical Fermenter - 9.25G/35L
BEST ANSWER: I use one with my fermentasaurus without any problems.
Can this be used on plastic Fermontser 7gal?
Timothy Chilcoat on Jan 27, 2018
BEST ANSWER: Yes, I have also used it on my Spidel 30 L ( 7.9 Gal). And works excellent. I did use a beach towel to wrap around my plastic Spide 30 L as temps were dropping down into the 30 s in my shop.
Will this work with the 7.5 gallon anvil bucket fermenter? Cheers
Jeff Shoemaker on Jan 24, 2020
BEST ANSWER: I have a 7 gallon BrewBucket, so I can’t see why it wouldn’t work on the Anvil. I wrap it around the fermenter and use masking tape to tape the edges to the fermenter.
Can this be used on the stainless steel brewbucket fermenter?
John Lilli on Apr 26, 2018
BEST ANSWER: On the outside of the fermenter yes. Works great with a bit of extra insulation around it for improved heat retention.
How do you use the FermWrap with the Fermzilla and the Insulating Jacket? I thought the Fermzilla couldn't use a heater because it's plastic.
Rob Sletten on Jan 30, 2020
The FermWrap™ Heater
The FermWrap™ Heater
Insulating Jacket for 27L FermZilla
Insulating Jacket for 27L FermZilla
FermZilla Conical Fermenter - 7.1 gal. / 27 L
FermZilla Conical Fermenter - 7.1 gal. / 27 L
BEST ANSWER: I would not use the FermWrap. It is too wide to fit the FermZilla and it is rated at 40 watt. Kegland suggests under 30 watt is safe. I used 4" wide reptile heat wrap for my FermZilla. That is 22 watts and I have had no problems.

4.6 / 5.0
135 Reviews
5 Stars
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Thermal wrap heating wrap
The thermal heating wrap works fantastic with my Inkbird temperature controller. I now have two of them and can control the temperature at all times within one degree on car it’s and or kegs during fermentation.
March 30, 2020
2 weeks ago
Second one i have purchased - works great
March 10, 2020
1 month ago
Some guidance or instruction needed
I purchased a FermWrap to help ferment the Hornindal Kveik yeast. I had no idea how warm it would get, but the yeast likes it up to 98 so I thought I was safe. 16 hrs later, the temp on the outside of the carboy was 125. I thought I had killed the yeast. Thankfully, that yeast is a monster and started to ferment again once I cooled it down and I think it may turn out OK. Some simple instructions would be helpful
February 25, 2020
1 month ago
Very disappointed the firm wrap does not have a lower operating temperature of 85 degrees F built in.
Since most yeast cannot tolerate heat above 85 degrees F, one would think that the Ferm wrap would have a built in temperature sensor to prevent that from happening without having to buy a thermostat control in addition. Pretty shabby in my mind.
February 22, 2020
2 months ago
This heater works well but unfortunately the plastic wrap is very brittle. It is already starting to crack where the electric cord connects.
February 18, 2020
1 month ago
FermWrap + mini fridge is a win
Does as advertised. No issues yet. Need to purchase a controller with it.

Outside temp is 55F, heated the minifridge up to 72F no problem.
February 16, 2020
2 months ago
Works exceptionally well.
This has changed my fermentation process for the better. with this FermWrap and immersion thermometer (in a thermowell) I am able to keep my wort temp within a degree of optimal desired fermenting temperature.
December 23, 2019
4 months ago
Works great
This thing is bomb. Taped the ends onto my carboy, wrapped in towel in my fermentation chamber, and raised 20 degrees no problem. Haven’t tried to go higher yet.
December 5, 2019
4 months ago
Work really nice , keeps my brew at 68 to 69 degree, I have a temperature control controlling my wrap.
November 30, 2019
4 months ago
Economical, user friendly, perfect for fermentation
If you need something to heat up your kegerator for fermentation if the weather is cold look no further. Paired with an Inkbird, this and the kegerator keeps my temperatures held at 70 degrees. For installment all I did was tape it to the back of the kegerator and run the line through the tap hole on top then seal it with the rubber plug.
November 23, 2019
4 months ago