Lasko Weather-Shield Performance Box Fan, 3 Speeds, Innovative Wind Ring System for Up to 30% More Air, Carry Handle for Bedroom, Office, Home, 20 Inch, White, 3720

my old lasko after 20 + yr gave out tried to return would not take back (lol just kidding) new fan super great defiantly low noise and puts out pjunty of air for me only draw back cord much shorter easy fix with quality short extension cord.but be nice if they did not skimp on the power cord other then that happy!! it a good box fan hopefully last like the last one.

These box fans are excellent! I bought these to replace the two Lasko 3720 box fans that I bought back in 2008. They are quite and are extremely powerful. The best part is there is no having to assemble these you just put the feet on, plug it in and turn it on and it only cost 2 cents an hour to run talk about energy efficiency! These Lasko box fans are incredibly durable. I do not put ether of mine in the windows, so I don't know how they perform in that configuration probably pretty well given how durable and powerful they are. This is the box fan you want to buy! I promise you won't regret it.

The fan brand quality and design are both poor. This creates wobble vibrations, unstable fan balance even with feet design, sharp edges, and "weather shield" appears to be upon out-blowing air formation only, there is no back engine "weather shielding" visible on inspection item.I should have returned it immediately, but it was very hot here, so my family did try to make due. The noise became truly unbearable with loud clacking sounds each time the off-kiltered blades hit the metal backing. Little pieces of plastic began to fly and the item was damaged. When we went to pick it up to inspect it, there are loose pieces of metal around he screw areas and other places of the aluminum on these that cut into my fingers.When it happened to just one initially I thought it was just the one faulty unit and set it aside for a project. then the second began to create noise as well. Upon inspection, it appears that the wobbly is unfixable, because the inside of the rotational area houses a "weather shielded" fan blade assembly, that has no track. this means it is easily falling off center without any rigid design to hold it in place.Not only is this disappointing but I also waited too long to return them. I would strongly recommend another type of fan. This was purchased because the quality of Lasko fans used to be remarkable a few years ago. However, the way the internal blade piece is attached now will always stretch and cause the wobble problems that cause that noise. I am not sure it will always be this noisy, and one of them functioned properly for 1 month. This is not a bearings-issue noise but the internal blades are not stable so they hit the metal supports in the back. It seems that the design could have benefitted from a circular back or indeed true weather-shielding to the back of the blade assembly as well. It is not a good design.The level of noise is deafening and disturbing to the family. It is extremely loud "clacking" when it hits and the speed causes the blades to damage. This means the unit is unusable- both of them.

deliver is great, forgot I asked to put in back yard duh thought someone took it, me bad. Love it Donna J

This review is for: Lasko 3720 20" Box FanHow on earth do you choose a box fan? Well really they mostly choose us don't they, we choose the first box we see. The product descriptions aren't much help, they mostly all say they are quiet, powerful, low cost to operate, etc. Are they really all that different from each other?When looking for a replacement fan I found 2 of our fans were recalled in 2005 for fire hazard, so now I am replacing 3 fans. I guess in-plug mini-fuses became universal for a reason. Let's get started...The 20" box fans we'll compare are:A - Aerospeed BX100B - Holmes HBF2002AC - Kenmore 32002D - Lasko 3720E - Lasko 3721F - Lasko 3723G - Lasko 3733H - Lasko B20201DESIGN AND DETAILS:---------------------All have white fans and grills, gray enclosures, 245-260 square inch areas the blades pass through, and 70"-73" cords.A - Aerospeed BX100- Wavy grill (BX200/BX400 have other grills).- Fan speed dial is on TOP.- Little smaller enclosure (you wouldn't notice unless side-by-side), though the blades pass through an area near to the highest square inches of the bunch.- The in-plug mini-fuse is easily replaceable if it blows.B - Holmes HBF2002A (Target)- Simple grid grill, blades have circle connecting them.- Fan speed dial and plug connection are on the MIDDLE OF THE BACK. This is not ideal if bringing air into the house from a window and not an attractive option when exhausting out.- The in-plug mini-fuse is easily replaceable if it blows.- Looks exactly like the Kenmore 32002.- NEGATIVE: At top speed it vibrates like crazy, enough to move itself.C - Kenmore 32002 (Sears/Kmart)- Simple grid grill, blades have circle connecting them.- Fan speed dial and plug connection are on the MIDDLE OF THE BACK. This is not ideal if bringing air into the house from a window and not an attractive option when exhausting out.- The in-plug mini-fuse is easily replaceable if it blows.- Looks exactly like Holmes HBF2002A.D - Lasko 3720- Circular grill, blue logo on the front, blue speed dial.- Fan speed dial is on TOP.- Lasko promotes this as their fan of choice to PUT IN A WINDOW because it is more RAIN RESISTANT (not weatherproof).- All Lasko in-plug mini-fuses are not replaceable.- This is a wider (4 3/4") and thus fairly STABLE fan enclosure compared to some of their models.- Should be mostly the same as 3721, except this has the blue logo.E - Lasko 3721- Circular grill, blue speed dial.- Fan speed dial is on TOP.- Lasko promotes this as their fan of choice to PUT IN A WINDOW because it is more RAIN RESISTANT (not weatherproof).- All Lasko in-plug mini-fuses are not replaceable.- This is a wider (4 3/4") and thus fairly STABLE fan enclosure compared to some of their models.- Should be mostly the same as 3720, except no blue logo.F - Lasko 3723- Circular grill, blue speed dial.- Fan speed dial is on TOP.- Although it physically LOOKS LIKE one, this is NOT one of the rain resistant ones like the 3270/3721 (larger size, blue dial, etc.).- All Lasko in-plug mini-fuses are not replaceable.- This is a wider (4 3/4") and thus fairly STABLE fan enclosure compared to some of their models.- LOOKS just like the 3721, larger enclosure and no blue logo. But again not a rain resistant model.- NEGATIVE: Rattles a little at all speedsG - Lasko 3733- Simple grid grill.- Fan speed dial is on TOP.- All Lasko in-plug mini-fuses are not replaceable.- NEGATIVE: Shakes a lot at settings 2&3.- NEGATIVE: Listeners thought the hum tone was more annoying than the others.H - Lasko B20201- Simple grid grill.- Fan speed dial is on TOP.- All Lasko in-plug mini-fuses are not replaceable.- NEGATIVE: LOUD at highest setting, listeners thought annoyingly so.- NEGATIVE: Little more of an airplane hum/whine sound."(yelling over a fan) THEY SAY THEY ARE ALL QUIET!"aka NOISE:-----------First some things that may help you get more out of this section on noise..- It takes +10dBA to be perceived as a doubling in LOUDNESS.- It takes just under +6dBA (5.85dBA) to be perceived as 50% (half-again) LOUDER.- It takes just over +3dBA (3.22dBA) to be perceived as 25% (quarter-again) LOUDER.(Note: When you read that +3dBA roughly doubles "sound pressure" that's different than perceived loudness)Most sounds 50dbA on up have more of a potential to annoy, for example when while trying to talk, and especially starting at 55dbA (highly subjective, but gives you an idea).Okay, now onto the comparison..SUBJECTIVELY listeners liked the WHOOSH of air sound much more than that of the HUM of a rotating object. I noted next to the fan descriptions above which ones listeners felt had a sound they didn't like as much, regardless of loudness.(A)Setting.....2' away.....5' away....10' away1.............48dBA.......45dBA.......43dBA2.............55dBA.......52dBA.......49dBA3.............64dBA.......60dBA.......57dBA(B)Setting.....2' away.....5' away....10' away1.............59dBA.......55dBA.......52dBA2.............63dBA.......60dBA.......57dBA3.............66dBA.......63dBA.......60dBA(C)Setting.....2' away.....5' away....10' away1.............58dBA.......54dBA.......51dBA2.............62dBA.......60dBA.......56dBA3.............66dBA.......63dBA.......60dBA(D)Setting.....2' away.....5' away....10' away1.............55dBA.......51dBA.......48dBA2.............62dBA.......58dBA.......55dBA3.............66dBA.......63dBA.......60dBA(E)Setting.....2' away.....5' away....10' away1.............55dBA.......51dBA.......48dBA2.............62dBA.......59dBA.......56dBA3.............68dBA.......65dBA.......62dBA(F)Setting.....2' away.....5' away....10' away1.............56dBA.......51dBA.......49dBA2.............62dBA.......58dBA.......56dBA3.............67dBA.......63dBA.......61dBA(G)Setting.....2' away.....5' away....10' away1.............60dBA.......55dBA.......52dBA2.............66dBA.......62dBA.......59dBA3.............70dBA.......66dBA.......63dBA(H)Setting.....2' away.....5' away....10' away1.............63dBA.......59dBA.......57dBA2.............68dBA.......64dBA.......61dBA3.............71dBA.......67dBA.......65dBAPOWER USAGE:--------------We see below that the difference in yearly electrical cost is fairly small, and of course much less than air conditioning. If a little additional on-going expense for a fan makes this much less costly alternative to air conditioning more palatable, then that's probably a good investment.However, being green is an important factor for some folks, so here below is a comparison in electricity usage I measured.(A)Setting.....Watts.....Annual Cost 12hrs/d 90d/yr 10cents/kWH1.............45W......$4.902.............55W......$5.903.............68W......$7.30(B)Setting.....Watts.....Annual Cost 12hrs/d 90d/yr 10cents/kWH1.............52W......$5.602.............61W......$6.603.............70W......$7.60(C)Setting.....Watts.....Annual Cost 12hrs/d 90d/yr 10cents/kWH1.............49W......$5.302.............60W......$6.503.............68W......$7.30(D)Setting.....Watts.....Annual Cost 12hrs/d 90d/yr 10cents/kWH1.............74W......$8.102.............92W......$9.903............110W.....$11.90(E)Setting.....Watts.....Annual Cost 12hrs/d 90d/yr 10cents/kWH1.............74W......$8.102.............95W.....$10.303............111W.....$12.00(F)Setting.....Watts.....Annual Cost 12hrs/d 90d/yr 10cents/kWH1.............71W......$7.702.............90W......$9.703............105W.....$11.30(G)Setting.....Watts.....Annual Cost 12hrs/d 90d/yr 10cents/kWH1.............58W......$6.302.............67W......$7.203.............84W......$9.10(H)Setting.....Watts.....Annual Cost 12hrs/d 90d/yr 10cents/kWH1.............60W......$6.502.............66W......$7.103.............83W......$9.00AIR VELOCITY:--------------The 5' and 10' were measured straight ahead from fans. The fan surface measurement was done roughly 1/2 way up the fan blades right against the grill.On fan surface air velocity half-way up a blade at one point is, of course, just a sample point, and air velocity at a distance can be greatly affected by the degree of focus/dispersal. Nevertheless, I hope this air velocity info helps us get a better sense for the differences between the fans.(A)Setting.....Fan_Surface.....5' away....10' away1................5.7mph......2.3mph......1.6mph2................7.1mph......3.1mph......2.1mph3...............10.6mph......4.6mph......2.6mph(B)Setting.....Fan_Surface.....5' away....10' away1................7.7mph......3.2mph......1.6mph2................9.5mph......3.9mph......2.0mph3...............11.2mph......4.2mph......2.1mph(C)Setting.....Fan_Surface.....5' away....10' away1................7.7mph......3.6mph......2.1mph2................9.8mph......4.6mph......2.6mph3...............10.4mph......5.2mph......2.9mph(D)Setting.....Fan_Surface.....5' away....10' away1................8.0mph......3.1mph......2.4mph2...............10.6mph......4.6mph......2.7mph3...............13.1mph......5.0mph......2.9mph(E)Setting.....Fan_Surface.....5' away....10' away1................7.8mph......3.6mph......2.0mph2...............10.5mph......4.5mph......2.6mph3...............13.2mph......6.2mph......3.0mph(F)Setting.....Fan_Surface.....5' away....10' away1................8.2mph......2.8mph......1.9mph2...............10.6mph......4.1mph......2.6mph3...............12.6mph......5.0mph......3.4mph(G)Setting.....Fan_Surface.....5' away....10' away1................6.8mph......3.0mph......1.6mph2................8.9mph......3.7mph......2.0mph3...............10.9mph......4.6mph......3.5mph(H)Setting.....Fan_Surface.....5' away....10' away1................9.4mph......2.9mph......2.3mph2...............11.6mph......4.6mph......3.2mph3...............13.3mph......4.9mph......3.9mphSELECTING A FAN:------------------I removed these fans for excessive shaking, rattling, noise, and/or hum/whine: (B)Holmes,(F)3723,(G)3733,(H)B20201.I then removed one fan for the center placement of dial and plug connection due to non-ideal position for window placement: (C)Kenmore.This leaves these to choose from:(A) Aerospeed BX100(D) Lasko 3720(E) Lasko 3721Some other little Aerospeed BX100 (Fan A) comparative details:- Option of lowest air velocity and noise would be of interest if someone will be very near.- Replaceable in-plug fuse in case it blows, the Lasko ones aren't replaceable.- Classic all-white front if you prefer that (like 3721 but not like 3720 with its blue logo).- The option of a little quieter at the very low end of the loudness range.- Lower electricity usage.Lasko 3720 and 3721 (Fans D&E) for their part give the option of a little more air velocity at the very high end of the velocity range.The Lasko 3720 and 3721 also look a bit different than the Aerospeed BX100, so looks may be another deciding factor for you.Note that for any given loudness or air velocity they overlap in, these models have very similar sound/velocity profiles. That is, when comparing points where air velocities are roughly equal for the fans (at the same distances), the loudness difference is so small I can hardly tell which is louder and the numbers support that.So there it is, my favorite three and some ways to compare them.SUMMARY:----------In the end these are just classic 20" box fans which are more similar than they are different. Hopefully whichever you choose won't be a lemon and will work for many years. Perhaps somewhere above you'll find information you can use to choose the best fan to meet your needs.Whatever you get, if it rattles, shakes like crazy, makes an annoying hum, etc., try exchanging it for another, don't settle, there are less annoying fans out there and you'll be listening to them for many years to come.I hope this helps someone :).SHOPPING NOTE:----------------Millions of 20" box fans are sold in the U.S. every year. Review sites cannot get anywhere near a statistically valid user sample, so although we learn from comments about DEFECTS and EARLY FAILURE, I suggest not filtering out a model based entirely on them.There are also old reviews that have already been acted on by manufacturers to improve the product or fix a description, thus the review may no longer be accurate.That said, defect and early failure comments with details are great for FEEDBACK TO THE MANUFACTURER (or author) and to help us all much more quickly SPOT SIMILAR ISSUES and thus get an exchange while it is quick and easy to do. Again though, I wouldn't use them to filter out a model entirely.