FB6 In-Line Filter Box w/ MERV12 Filter, 6" Duct Zoom

FB6 In-Line Filter Box w/ MERV12 Filter, 6" Duct


Brand: Fantech

Qty Price
/ each
$241.95 / box (3 units x $80.65)
In Stock! Ships in 24-48 Hours
(15 Available)


Warranty: 1-Year Warranty
Product Type: Filter Box

Description for Fantech FB6

The simple addition of a Fantech Inline Filter Box adds even more filtration to your home's Indoor Air Quality system.

Installs in ductwork after HRV or inline fan as an additional filter for incoming air. Includes MERV12 filter. Specifications:

  • 10" depth x 8" height x 20-1/2" length
  • 22-gauge galvanized steel with baked powder coat finish

FB6 In-Line Filter Box w/ MERV12 Filter, 6" Duct


by PowerReviews
FantechFB6 In-Line Filter Box w/ MERV12 Filter, 6" Duct

(based on 5 reviews)

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Reviewed by 5 customers

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Decent product with fit problems

By asavage

from Duvall, Wash.

Verified Buyer



      Best Uses

        Comments about FB6 In-Line Filter Box w/ MERV12 Filter, 6" Duct:

        PexSupply asked me to review this in Sep2013, and because I'd taken pics I went ahead and wrote an article about my experience with it, which I put here:


        Here's the text without the benefit of the pics:

        The FanTech FB6 is an inline air filter with 6" diameter hose connections. I bought one in Mar2012 and installed it in our (legal) mj grow room to keep bugs, dust, and assorted crud from mucking up the ducted light hoods. You move a lot of air to keep 2kw of metal halide or high pressure sodium lamps cool enough to survive, and even a little dust or a few bugs really makes a mess in the hoods.

        This $81 box from PexSupply looked like just the ticket. The nicely gasketed front cover comes off with two thumbscrews, to reveal the 10x20x1 MERV 12 filter.

        [picture of unit with cover off, showing filter]

        The construction is sturdy and the finish is professional and good-looking.

        However, I do have a few nits to pick.

        One is that, for a device that's designed to filter air, it has quite a few areas that I had to caulk up. If light comes through to the inside, so does air. I had leakage both at metal seams, and at corner breaks:

        [pictures highlighting light (air) leakage areas]

        The major quality problem I found with this unit is the mismatch of the channels that guide & retain the 1" filter. Take a look at the second picture below. That's not parallax error, that's a channel mismatch of something approaching 1/8" ! The filter just would not fit in well until I bent that channel up something fierce. A real shame, because overall the chassis is a nice piece of work.

        [pictures illustrating filter guide channel misalignment]

        There is some assembly required: you get to screw the plastic 6" duct adapters to the chassis, and I'm not very impressed with the supplied setup. The plastic adapter's flange is too flimsy to be mounted with only four sheet metal screws, and I found a lot of air leakage where it mates to the chassis. And if you tighten the screws a bit too much, the flange deforms easily and badly.

        My fix was to run eight screws in, instead of four, and to use silicone between the surfaces before mounting. That worked well.

        [pictures showing duct adapter mounting]

        I'm not unhappy with the unit, when all's said & done. I drilled four holes through the back and screwed it to a wall in our garage, and it worked very well after the mods above, for the one grow I used it. I found many many bugs in the filter after four months runtime, though not much dust. The hoods stayed much cleaner, and that was the result I was shooting for. I bought a spare element from PexSupply but never needed it.

        • Was this a gift?:
        • No

        Well made!

        By DJ

        from King of Prussia PA

        Verified Buyer



            Best Uses

              Comments about FB6 In-Line Filter Box w/ MERV12 Filter, 6" Duct:

              Used in a lab facility. Attached to other connectors with no problems.

              • Was this a gift?:
              • No

              A good bang for the buck.

              By Jim G.

              from Lititz, Pa.

              Verified Reviewer

              Comments about FB6 In-Line Filter Box w/ MERV12 Filter, 6" Duct:

              I was very pleased with both the price, and the quality of this well built product; works great (looks good too). It is one of a kind, as I've not seen anything similar. This was also my first time dealing with Pex Supply; it was the best pricing available for this filter, and I recieved my order in good condition. I'm a happy camper.


              Nicely made and a great addition

              By Mikey

              from Tennessee

              Verified Buyer

              Comments about FB6 In-Line Filter Box w/ MERV12 Filter, 6" Duct:

              This is a great addition to the Fantech Fresh air systems. Easy to install and very well made. Insures that the fresh air coming into your system is clean and will not damage the fresh air system


              Just what I was looking for ...

              By Randy the great fan installer

              from Mechanicsville VA

              Verified Buyer

              Comments about FB6 In-Line Filter Box w/ MERV12 Filter, 6" Duct:

              I installed this box between an outdoor air intake and an inline fan also from Fantech. It is nice to know the incoming air is filtered. Box is sturdy and air tight. I dislike that the screws are too long and I must turn and turn to get the lid all the way shut. Other than that I was really pleased to find a product out their for what I needed. thanks Fantech and thanks Pex Supply!

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              Q&A: Ask the Questions, share answers

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              1 Question | 2 Answers
              Displaying question 1
              • FB6 In-Line Filter Box w/ MERV12 Filter, 6" Duct


                will this unit accept off the shelf filters? what size is the filter?
                Asked on 2/12/2011 by Anonymous

                2 answers

                • CUSTOMER CARE


                  This unit accepts 10" x 20" x 1" MERV 12 filters, and is compatible with off-the-shelf filters.

                  Answered on 2/14/2011 by PexSupply Staff from NY
                • VERIFIED BUYER


                  The filter is a 10" x 20" filter x 1'" size. I'm sure a regular good filter will work.

                  Answered on 8/12/2011 by Mikey from Tennessee
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