--- product_id: 32533519 title: "LB2 No-Clog, Zero Maintenance DEDPV Dryer Duct Booster Fan with Automatic Activation" brand: "tjernlund" price: "$843.99" currency: USD in_stock: true reviews_count: 8 category: "Tjernlund" url: https://www.desertcart.us/products/32533519-lb2-no-clog-zero-maintenance-dedpv-dryer-duct-booster-fan store_origin: US region: United States of America --- # 50W motor power Maintains airflow up to 100 ft LED indicator display LB2 No-Clog, Zero Maintenance DEDPV Dryer Duct Booster Fan with Automatic Activation **Brand:** tjernlund **Price:** $843.99 **Availability:** ✅ In Stock ## Summary > 🚀 Turbocharge your dryer, save time & energy like a pro! ## Quick Answers - **What is this?** LB2 No-Clog, Zero Maintenance DEDPV Dryer Duct Booster Fan with Automatic Activation by tjernlund - **How much does it cost?** $843.99 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/32533519-lb2-no-clog-zero-maintenance-dedpv-dryer-duct-booster-fan) ## Best For - tjernlund enthusiasts ## Why This Product - Trusted tjernlund brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Versatile installation:** Fits both horizontal and vertical ducts up to 100 equivalent feet with easy setup. - • **Cut drying times in half:** Boost your laundry efficiency with 50% faster drying cycles. - • **Smart automatic activation:** Pressure-sensing fan turns on only when needed, saving energy effortlessly. - • **Durable design for longevity:** Motor positioned outside airflow for maximum lifespan and quiet operation. - • **Zero maintenance, zero worries:** No-clog Lint Blitzer impeller and 5-year no-clog guarantee keep your system running smoothly. ## Overview The Tjernlund LB2 Dryer Duct Booster Fan is engineered to optimize dryer performance by maintaining proper exhaust velocity in duct runs up to 100 equivalent feet. Featuring a powerful 50W motor isolated from heat and lint, an innovative Lint Blitzer impeller to prevent clogging, and an LED display for easy monitoring, it reduces drying times by 50% or more while minimizing fire hazards. With automatic activation and a 5-year no-clog warranty, it’s the ultimate upgrade for efficient, safe, and low-maintenance laundry. ## Description The Tjernlund LB2 Dryer Duct Booster Saves significant energy - reducing drying times 50% or more. Reduces lint build-up, dust & fire hazards by maintaining proper velocity in duct runs up to 150 equivalent feet. Features the Lint Blitzer material handling wheel & 5 year no-clog guarantee. 50 watt motor is not exposed to heat, lint or moisture. Includes 115 VAC cord - automatic operation. Suitable for gas and electric dryers. Clothes dryers are often installed in areas of homes where they cannot work effectively. This is because moist air cannot effectively exit the dryer and exhaust to the outside—bogging down the entire drying process. If a dryer’s vent run is over 25 equivalent feet* or the dryer is experiencing long drying time, your dryer may need a dryer booster fan. The LB2 Dryer Duct Booster can also reduce the potential fire hazard associated with lint buildup. Review: Awesome, heavy duty fan. Installation requires some skills. - This fan is a beast! Moves air like a jet engine slightly above idle. I had to mount it horizontally above my first floor with has a 2 x 12 stud bay. That was barely enough room for the install. I also had a challenge with the silicon pressure sensor tube, in that orientation (180 degree flip wouldn't work because the tube would then be pointing down and collecting moisture) the tube can get pinched by the bracket. I had to sleeve the tube with polyurethane tubing to create a stiff sleeve to protect it. Also, my first install didn't work. The fan would run its calibration for 7 seconds exactly and then after 5 minutes of quiet time when the dryer turned on it failed to switch on. I removed my install and after some digging with AI I bridged pins 1 & 2 at J9 on the PVC Ver 02 board. This, supposedly, puts the fan into a higher sensitivity mode and it seemed to work. I used a 2.54 mm jumper cap to bridge the connection. After a bench test (leaf blower in the garage) it worked and I was comfortable enough to wrestle it back into position in my ceiling. The fan works great now. Every once in a while it has some logic fault but I plugged it into a remote switch so can I can turn it off and have it recalibrate which fixes any issues. It doesn't happen often but when it does it's nice not to have to go unplug it or trip circuit breakers. Please contact company support, I solved my problem but not sure the company would have made that recommendation. My run is not that long, maybe 20-30 feet which is at the bare minimum for this unit. I, however, am a believer in moving a lot of air through a dryer and can attest that my clothes dry in half the time. I hope to never have to climb up there to clean it out but we shall see in a year or two. This is a huge step up from Fantek which I had before and had to drill holes in the housing to blast lint out of it with my air compressor. Keep in mind his fan is mounted with rubber shock absorbers but I also screwed the bracket onto my ceiling joists with rubber pads under the bracket for more vibration absorption. So far it has been quiet and moving a ton of air through my duct. Very happy although it took a lot of trial and error to get it working in my location. Review: Amazing product - Our dryer vents up into our attic. Ive put off getting a booster fan for many years. We bought a new washer dryer set and I had to finally put one in. I looked at all the booster fans available and decided to drop the coin on this unit. I gave it four stars for ease of install. Some notes about that. The instructions are VERY good, but if you do not have DIY skills it may challenge you a bit. But, if you can run some ducts, wire up a outlet, and read a measuring tape, it shouldn't be too difficult. The one goof I made is I installed it backwards at first. As it senses pressure to turn on it didn't work. totally my fault. I turned it around and viola! This thing is very sensitive. Pressure wise I mean. I had it all hooked up and was testing it. Everything worked great. My dryer was pulled out from the wall about 2'. So I pushed it back and in doing so the flexible ducting from the dryer to the wall changed shape a bit. Tried the dryer again and the booster fan wouldn't turn on. No big deal just had to re-calibrate the fan. Which just involves unplugging it and plugging it back in. One thing I have noticed with my washer and dryer being in my garage is I do have to re-calibrate the fan with the season changes. Again no big deal, just unplug and plug back in. The BEST part about this fan is the amount of time it has taken off our laundry cycles. We went from over and hour to dry a big load, to less than 30 minutes. I have never had it not turn on, has a ton of power, and its dang quiet. After reading some reviews on other fans, just spend the extra $$ and buy this one. Buy once cry once. 5 years later and the unit is still going strong. The recalibration issue with the seasons has happened less and less. I don't think I've had to do it for about 2 years. The one thing I forgot to mention is, make sure you clean your lint trap EVERY LOAD. You should be doing this anyway, but especially with this booster. We keep a basket right in front of the dryer to drop the lint into and it has become a habit. ## Features - Highly recommended for homes with dryer exhaust duct run of 25 feet or more - Lint Blitzer impeller repels lint - LED indicator display panel - Permanently lubricated motor is positioned outside of air stream for maximum motor life - Easy installation in both horizontal and vertical ducts - Maintains proper exhaust velocities in duct runs up to 100 equivalent feet, optimizing dryer performance ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00TUIF8LE | | Access Location | Front Load | | Best Sellers Rank | #40,918 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #650 in Industrial Electrical Controls & Indicators #803 in Household Furnace Parts & Accessories | | Brand | Tjernlund | | Brand Name | Tjernlund | | Capacity | 15 Kilograms | | Color | Silver | | Customer Reviews | 4.2 out of 5 stars 446 Reviews | | Form Factor | Front Load | | Global Trade Identification Number | 00080956959959 | | Included Components | dryer duct booster, Notification panel | | Item Dimensions D x W x H | 14"D x 10.5"W x 10"H | | Item Type Name | dryer duct booster | | Item Weight | 14.44 Pounds | | Manufacturer | Tjernlund | | Material | copper | | Material Type | copper | | Model Name | Lint Blitzer | | Specification Met | UL | | UPC | 080956959959 | | Unit Count | 1.0 Count | | Warranty Description | 5 year manufacturer's warranty | ## Product Details - **Brand:** Tjernlund - **Form Factor:** Front Load - **Access Location:** Front Load - **Capacity:** 15 Kilograms - **Color:** Silver ## Images ![LB2 No-Clog, Zero Maintenance DEDPV Dryer Duct Booster Fan with Automatic Activation - Image 1](https://m.media-amazon.com/images/I/81Yaerscu8L.jpg) ## Available Options This product comes in different **Part Number, Style** options. ## Questions & Answers **Q: can i install this unit behind the dryer** A: No. There's a chart that you have to use to calculate the distance from the dryer to the booster based on the total length of the duct work. See this link for installation instructions, the information you need is on page one. http://www.tjernlund.com/Tjernlund_LB2_Dryer_Duct_Booster_8504216.pdf **Q: I want to know what type of wire goes to the led indicator display panel? it looks like solid core but i am not sure. also what gauge?** A: The unit comes with the wire to connect to the LED indicator panel. It is a 18 or 20 gauge 3-wire solid conductor, either will work. **Q: Would it help to install a secondary lint trap even the LB2 is far enough from the dryer (based on the chart) or it will just be useless ?** A: I think you’re asking: Can I put a lint filter in front of the intake side and then put the fan further than the chart recommendation from the dryer.. It’s all physics. I would say, yes. But then you will limit the distance for the output side. If I had to guess it would reduce the output distance potential by 3/4 of the recommended maximum distance. So 100’ to 25’. **Q: What is the difference between lb1 and lb2** A: I looked on the Tjernlund website and they do not even list making/selling the LB1 model. I was able to find a spec sheet on it and from what I can tell they are the same. My guess is they changed something (maybe like the motor) and gave it a new model number LB2. I have the LB2 and it works great. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Awesome, heavy duty fan. Installation requires some skills. *by M***E on January 21, 2026* This fan is a beast! Moves air like a jet engine slightly above idle. I had to mount it horizontally above my first floor with has a 2 x 12 stud bay. That was barely enough room for the install. I also had a challenge with the silicon pressure sensor tube, in that orientation (180 degree flip wouldn't work because the tube would then be pointing down and collecting moisture) the tube can get pinched by the bracket. I had to sleeve the tube with polyurethane tubing to create a stiff sleeve to protect it. Also, my first install didn't work. The fan would run its calibration for 7 seconds exactly and then after 5 minutes of quiet time when the dryer turned on it failed to switch on. I removed my install and after some digging with AI I bridged pins 1 & 2 at J9 on the PVC Ver 02 board. This, supposedly, puts the fan into a higher sensitivity mode and it seemed to work. I used a 2.54 mm jumper cap to bridge the connection. After a bench test (leaf blower in the garage) it worked and I was comfortable enough to wrestle it back into position in my ceiling. The fan works great now. Every once in a while it has some logic fault but I plugged it into a remote switch so can I can turn it off and have it recalibrate which fixes any issues. It doesn't happen often but when it does it's nice not to have to go unplug it or trip circuit breakers. Please contact company support, I solved my problem but not sure the company would have made that recommendation. My run is not that long, maybe 20-30 feet which is at the bare minimum for this unit. I, however, am a believer in moving a lot of air through a dryer and can attest that my clothes dry in half the time. I hope to never have to climb up there to clean it out but we shall see in a year or two. This is a huge step up from Fantek which I had before and had to drill holes in the housing to blast lint out of it with my air compressor. Keep in mind his fan is mounted with rubber shock absorbers but I also screwed the bracket onto my ceiling joists with rubber pads under the bracket for more vibration absorption. So far it has been quiet and moving a ton of air through my duct. Very happy although it took a lot of trial and error to get it working in my location. ### ⭐⭐⭐⭐⭐ Amazing product *by R***R on December 3, 2020* Our dryer vents up into our attic. Ive put off getting a booster fan for many years. We bought a new washer dryer set and I had to finally put one in. I looked at all the booster fans available and decided to drop the coin on this unit. I gave it four stars for ease of install. Some notes about that. The instructions are VERY good, but if you do not have DIY skills it may challenge you a bit. But, if you can run some ducts, wire up a outlet, and read a measuring tape, it shouldn't be too difficult. The one goof I made is I installed it backwards at first. As it senses pressure to turn on it didn't work. totally my fault. I turned it around and viola! This thing is very sensitive. Pressure wise I mean. I had it all hooked up and was testing it. Everything worked great. My dryer was pulled out from the wall about 2'. So I pushed it back and in doing so the flexible ducting from the dryer to the wall changed shape a bit. Tried the dryer again and the booster fan wouldn't turn on. No big deal just had to re-calibrate the fan. Which just involves unplugging it and plugging it back in. One thing I have noticed with my washer and dryer being in my garage is I do have to re-calibrate the fan with the season changes. Again no big deal, just unplug and plug back in. The BEST part about this fan is the amount of time it has taken off our laundry cycles. We went from over and hour to dry a big load, to less than 30 minutes. I have never had it not turn on, has a ton of power, and its dang quiet. After reading some reviews on other fans, just spend the extra $$ and buy this one. Buy once cry once. 5 years later and the unit is still going strong. The recalibration issue with the seasons has happened less and less. I don't think I've had to do it for about 2 years. The one thing I forgot to mention is, make sure you clean your lint trap EVERY LOAD. You should be doing this anyway, but especially with this booster. We keep a basket right in front of the dryer to drop the lint into and it has become a habit. ### ⭐⭐⭐⭐⭐ Possible to Install without Instructions…but not recommended. *by A***5 on January 2, 2023* I just finished installing an LB2. In my case, the solid 4” vent went straight up an 8 foot ceiling, came out of top rack, went into an Omni-elbow, another straight pipe at a 30 degree angle for 6 feet, and then a final elbow to go out the roof. When we moved in, clothes wouldn’t dry at all. We cleaned out 3 shopping bags of lent, and then the dryer worked great. The next year, it wasn’t very dirty, so we left it for 5 years and then it didn’t dry well at all. Again we cleaned it and bought this LB2. Some Mounting Tips: Mine didn’t come with instructions, but it came with brochures. From the brochures, I was able to figure out how to attach the included mount to the actual LB2 itself. Then I realized, the mount needs to be mounted such that the bottom of the “L” was actually under the LB2. Since it would be difficult to attach the mount to a surface with the LB2 attached, I realized the mount needed to be attached to a mounting structure first, and then the LB2 attaches to the included mount. Preparation and Mounting: First, I did some electrical work in the attic so I would have a plug close to the motor. That took a few hours in my case. Second, I took out the 6 foot pipe that went to the roof. I cut a 6 inch piece of treated 4x4 I had left over from when I built my fence. I used strong wood glue and 4 inch screws to attach the 4x4 to a cross beam. I mounted the LB2 and then I used the stiffer flexible aluminum piping to attach it all together. I also got a 4 inch y from Amazon and hooked that up as a future “clean out” so I could clean the lent from the attic side in the future. Low-Voltage Details: The low-voltage cord was super long—way too long for me. I recommend using a 1-gang low-voltage bracket to attach the wall plate in the laundry room. I know the plate makes it look like a 2-gang, but there’s only screws for the 1-gang. I cut the cord way shorter with plenty of slack still. Stripped it (18 gauge solid) and the didn’t know how to hook up the wires to the plate. It’s labeled, but in my experience, G is for ground. But there’s G, R, and Grnd. And the colors were G, R, W. So I googled and found —-oh, there were instructions !!! Lol!! The white cord goes to Grnd, which was my first guess anyway. Pressure Tube: After having seen the instructions, I checked the little pressure tube. Glad I did before I plugged the LB2 in. Because the nipple had punctured through the tube. So, I pulled off the tube and snipped a bit off and reconnected it. That worked perfectly. Calibration and Success: After having found instructions, I followed them regarding the “calibration process” and it seemed to work perfectly. First “test” with the dryer after calibration worked great. We washed a load of sheets and blankets and it took the dryer 50 minutes. That’s about typical for that load when the dryer vent is clear. So, it seemed to be no big saver with that datapoint, but the LB2 turns on and off correctly. We washed towels and it took 1 hour and 42 minutes. When the vent was clear, it typically took 1 hour 50 minutes. But…the dryer actually ran correctly with the automatic setting. That’s never happened before. Normally, when we would run it with that setting, it would kick off after an hour and not be dry. So we would have to use “timed dry” for 50 more minutes. All in all, houses shouldn’t be designed so that dryer vents go up or anything. They should go straight out. Boom. Then no problems. Real world, this LB2 is helping our dryer actually work properly, will keep the vent clear by blowing the lent from the vent with little clogging, and is certified for gas dryers, so we may switch to that in the future. The install took 8-10 hours, including electrical work, spread out over 3 days. But I’m a DIYer and I’m not that smart. Fortunately, I have a little common sense. I’d buy it again and would recommend. But deck the area of the attic first if you can. ## Frequently Bought Together - Tjernlund LB2 No-Clog, Zero Maintenance DEDPV Dryer Duct Booster Fan with Automatic Activation - Tjernlund LT4 Lint Trap for DEDPV Dryer Booster Fans - EesTeck 4" (Diameter) Adjustable 304 Stainless Steel Duct Clamps Hose Clamp Pipe Clamp Air Ducting Clamp worm drive hose clamps (4Pcs, 91mm-114mm) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/32533519-lb2-no-clog-zero-maintenance-dedpv-dryer-duct-booster-fan](https://www.desertcart.us/products/32533519-lb2-no-clog-zero-maintenance-dedpv-dryer-duct-booster-fan) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-05-11*