FermWrap Fermentation Heater

FermWrap Fermentation Heater

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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.
Kegland Part number: KL06255 
Item # FE650
Shipping Eligible for Free Shipping Program
Availability California - In Stock
Pennsylvania - Out Of Stock
Weight 0.25 LBS
Community Q&A

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Browse 9 questions Browse 9 questions and 87 answers
Why did you choose this?
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I need this because my fermenting freezer is outside and it is cold. I want the beer to ferment at an optimal range.
Jonathan J on Dec 8, 2022
Internet reviews
Larry E on Nov 28, 2022
I need this because my fermenting freezer is outside and it is cold. I want the beer to ferment at an optimal range.
Jonathan J on Dec 8, 2022
keep the temp in the winter
Big Al on Nov 28, 2022
Internet reviews
Larry E on Nov 28, 2022
cold weather brewing, hopefully this will help
Isaac K on Nov 15, 2022
Warm Barrel during MLF
Joe M on Nov 1, 2022
These little heaters don't look like much, but they really work! I'm fermenting hard cider in a barn and without this heater the process slows to barely a crawl. Excellent product!
Jerry F on Oct 12, 2022
Need for fermenting lagers
Chris S on Sep 5, 2022
I have it and it works great for heating
Jon D on Aug 25, 2022
Value and function.
Michael D on Aug 1, 2022
got one already
brian h on Jul 12, 2022
adding a bright tank to the system
Richard on Jun 2, 2022
So we can use Kveik
Dion F on May 31, 2022
Want temperature control with fermzilla
John W on May 14, 2022
Will maintain my Fermentation temps
Nicholas T on May 7, 2022
To be able to ferment at higher temps, which will enable me to ferment with Kviek yeast, and have a drinkable IPA within 5-7 days of brewing.
Michael C on Apr 28, 2022
great word of mouth recommendations
michael w on Apr 28, 2022
Basement temperature can get cool.
Kevin B on Apr 26, 2022
I need a higher heat source for my fermentation fridge
Dave B on Mar 19, 2022
pre order and price
joshua john logan on Feb 23, 2022
Winter temp and need to keep some heat on the fermenter
Kevin B on Feb 2, 2022
Old one wore out
Valued C on Feb 2, 2022
to heat
Ryan B on Jan 27, 2022
only one you have
Ronald S on Jan 25, 2022
It’s winter and I wanna make mead
Walter W. S on Dec 24, 2021
Need warmer for my small 7 gal SS conicals. Cheaper than buying the whole kit from SS Brewtech since I already have the temp controllers.
Nathaniel S on Dec 22, 2021
Simple heater for winter
Ryan H on Dec 20, 2021
Gail A K on Dec 10, 2021
Gift for relative
Katherine L on Dec 7, 2021
To control Fermentation temps
Jeff S on Nov 18, 2021
to help control my fermentations
WILLIAM H on Oct 20, 2021
Fermentation Temp control
Charles O on Sep 25, 2021
Winter is coming
Garrett R. M on Sep 21, 2021
for heat
Ryan H on Sep 14, 2021
Wanted to control a high fermentation temp on beer fermented with Kveik.
James D on Sep 8, 2021
For fermenting with Kviek yeast
Vincent K on Sep 3, 2021
Starting Temperature Controlled Fermentation
John M on Aug 7, 2021
I picked this item
Vincent B on Jul 10, 2021
The one I do own is similar but stopped working.
James P on Jun 2, 2021
Wort would you expect? its the best on the market!
John d on May 31, 2021
KD on Jan 20, 2021
need it, winter here
John R H on Jan 16, 2021
Brewing two ales in the winter has necessitated the purchase of a ~second~ fermentation heater
Adrian L Febre on Jan 13, 2021
Valued C on Jan 9, 2021
Seems like a great pick for a beer lover
Paloma Acha D on Jan 7, 2021
control fermentation heat
Stephen S on Jan 4, 2021
Temp control while fermenting in keg
Stephen S on Dec 24, 2020
replace broken heater
Russ Brodeur on Nov 18, 2020
temperature control in colder months
Richard Arthurs on Nov 6, 2020
Already use this product - need more
larryh on Oct 30, 2020
Good reviews
Douglas C on Oct 28, 2020
keep the temp in the winter
Big Al on Nov 28, 2022
cold weather brewing, hopefully this will help
Isaac K on Nov 15, 2022
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.
Can I put this on a stainless steal fermenter?
Cainon brown on Jan 3, 2021
BEST ANSWER: I use mine on a 7 gal stainless steel fermenter and am VERY happy with it. I brew in my garage and with an inkbird controller, this heater will keep my beer at 68 F even when the garage temp is 30 F. I use black electrical tape to hold it against the fermenter. To be fair, I do wrap the fermenter with insulation right over the heater.
How much can you raise the temperature with the sleeve added?
Jeffrey Clause on Mar 30, 2022
BEST ANSWER: I wrapped a glass fermenter with this heater and then covered everything with towels. It fermented a beer with Kveik yeast at close to 100°F. It might be able to go higher, but it seemed like that was about the limit. I used a temperature controller to maintain that temperature, so I don't know for sure.
When using this with the Neoprene sleeve does it go inside or outside the sleeve?
Ryan Heideman on Apr 12, 2020
BEST ANSWER: You will get the most efficient use of your heater by putting it directly onto your fermenter and inside the neoprene sleeve.
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 FermZilla 27L Conical or 60L All Rounder
Insulating Jacket for FermZilla 27L Conical or 60L All Rounder
FermZilla Conical Fermenter - 7.1 gal. / 27 L
FermZilla Conical Fermenter - 7.1 gal. / 27 L
BEST ANSWER: If you read the fermwrap it is a low watt heater more like a heating pad not enough to effect plastic

4.6 / 5.0
152 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Rated 5 out of 5
Best Temp Control
I have been using these for years with a temp controller. This new design on how cord attaches is a great improvement over previous models.
December 1, 2022
4 weeks ago
Rated 4 out of 5
I am a bit disappointed with the heater, but it is my own fault. I assumed the heater would be thermostaticly controlled, it is not. Apartrom that it works great, I just have to keep an eye on it.
November 30, 2022
1 month ago
Rated 5 out of 5
Great product
Just what I need for my fermenter
October 6, 2022
2 months ago
Rated 5 out of 5
The fermwrap is perfect for my brew set up.
May 16, 2022
7 months ago
Rated 5 out of 5
Versitile, simple, works on an anvil bucket nicely. Keep it simple stupid.
Wrapped with anvil cooling package.
Wrapped with anvil cooling package.
January 10, 2022
11 months ago
Rated 4 out of 5
Easy to use with an inkbird
This works great in conjunction with an InkBird . May fermenter stays a reasonably consistent temperature.
January 4, 2022
1 year ago
Rated 5 out of 5
Heats well
It does a good job heating my chest freezer during periods of fermentation. Would recommend only using with a temperature controller as the heat wrap does not have a temp control.
December 27, 2021
over 2 years ago
Rated 4 out of 5
Does the job. I did need to replace the screws that held the cord to the mat.
December 9, 2021
1 year ago
Rated 5 out of 5
Did not fit the 7 gal X1 Uni, however...
While this didn't work out for my fermenter, I have repurposed it in an ice cooler to keep fermenting kombucha at 80 F along with an Inkbird ITC 308.
November 15, 2021
1 year ago
Rated 2 out of 5
Not great
I had to recrimp the wire connection on to the heater after the first use. Not easy to wrap around fermentor and actually have it stay in place.
August 24, 2021
over 3 years ago