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FermWrap Heater
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Keep your yeast happy and your ferment warm during those cold winter months with this flexible heater wrap! Unlike those old heater belts, the FermWrap covers a wide area of your carboy or fermentation vessel, promoting an even heat distribution (11" tall x 25" wide.). 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 degrees Fahrenheit. This differential can be increased by using our carboy bag to insulate a carboy (this has been tested). To decrease the temperature differential, stick only a portion of the FermWrap to the fermenter.

With 40 watts of heat spread over almost two square feet it provides gentle even heating. Draws 40 watts. 115V.

For more precise results, we recommend a temp controller and carboy thermowell for the ultimate in fermentation temperature control. Or for the best control, use the dual stage control and carboy thermowell, as well as a refrigerator, to control both the high and low temps.

This is the original FermWrap(TM) manufactured and wired by Fermentap in the USA. Be aware there are now some imitations being sold coming from China that have the electrical wire connections, where the cord meets the heat wrap, sealed with silicone. The FermWrap uses the proper electrical clip connections which are safer and will last longer.

Item does not include carboy as pictured.

Item # FE650
Shipping Eligible for Free Shipping Program
Availability California - In Stock
Pennsylvania - In Stock
Weight 0.25LBS
Community Q&A

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Browse 4 questions Browse 4 questions and 31 answers
Why did you choose this?
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Hopefully get better fermenation in cooler weather
James R on Oct 31, 2018
ML fermentation
Dominic B on Oct 17, 2018
Hopefully get better fermenation in cooler weather
James R on Oct 31, 2018
to heat stuff
David E on Oct 27, 2018
ML fermentation
Dominic B on Oct 17, 2018
making madeira wine
William Andrews on Sep 17, 2018
Want to control temp
Andrew C on Jul 6, 2018
Set up for another temperature regulator
David D on Jun 11, 2018
To improve fermentation control
Christopher K on Jun 5, 2018
Fermentation control is important
tom b on May 22, 2018
Keeping cardboard at proper temperature for fermentation
Jeff V on Apr 25, 2018
They work well
Steven K on Apr 24, 2018
Brewing a saison at high temps
Bradley M on Apr 19, 2018
To keep my fermenters at optimum temperature
gordon l on Apr 17, 2018
I want to make a lager and need a way to control temperature
Cory R on Apr 10, 2018
Temperature control is very important for consistent beer.
Gary A J on Apr 5, 2018
Gotta heat the goods sometimes
Steve J on Mar 26, 2018
Heat my chest freezer for fermentation, tape to side using duct tape
Matt R on Mar 20, 2018
cold in barn .
George H on Mar 16, 2018
Works well and I needed another one.
Richard M on Mar 6, 2018
to keep fermenter nice
leonard c on Mar 1, 2018
I want to use a little bit of a high-yield yeast and I need to control my heat
mathew J k on Feb 28, 2018
Need to control fermentation temperature.
Alessandro V on Feb 13, 2018
I have a fermentation fridge, but needed a warmer to keep it at a higher temp. Friend had one of these and recommended it!
bc-bruce on Jan 25, 2018
to heat stuff
David E on Oct 27, 2018
making madeira wine
William Andrews on Sep 17, 2018
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 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.
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.

4.7 / 5.0
110 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Works great with the inkbird controler. First lager with the system has been a breeze with this unit in a small freezer.
October 24, 2018
1 month ago
Mine didn’t work
It never worked. I bought it for a carboy but I graduated to a conical fermenter. I was trying to use it to warm up the fermenter a little in my refrigerator fermention chamber. It never got even slightly warm. I may have gotten a bad one, but I wouldn’t recommend it.
September 21, 2018
10 months ago
One of better pieces of equipment that I’ve bought. Works great to warm a batch up.
July 2, 2018
10 months ago
Works well
Easily maintains a 6 gallon batch 20+ degrees F above ambient, with minimal insulation. Nice size for wrapping around my PET carboys.
May 14, 2018
10 months ago
My 2 new FermWrap Heaters worked great at keeping my yeast happy and fermenting right along. Nice gentle heat for great results every time.
May 4, 2018
7 months ago
A must have for dual stage temp control. Simple effortless install. I have another that’s still going after about 5 years.
April 27, 2018
7 months ago
Great Value
Keeps ales at proper temps on those cold evenings. Allows fermentation temps. to remain steady. I use it on my ssbrewtech bucket with thermowell so there is no taping of temp probe (very convenient). I find electric tape does not stay stick to well and have resorted to duck tape just at corners which holds better
April 23, 2018
10 months ago
Best on the market.
These wraps are the best on the market. American made. These are all I buy!!
March 27, 2018
10 months ago
Nice product , easy to use
I use this item often. It does keep temp at crucial times. I have coupled it with a Johnson Temp Control to gain more efficiency.
March 26, 2018
8 months ago
Works great. I use the Ferm Wrap with an ink bird temp controller and can stay within 1 degree of desired fermentation temp.
March 4, 2018
10 months ago