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212 of 212 found the following review helpful:
 Triple Comparison Review - Bionaire BW2300 - Holmes HAWF2043 - Honeywell HW-628 Jun 07, 2009
By Robert C.
You are in luck today.
This is a direct comparison review between the three most popular currently available twin window fans:
Bionaire BW2300 Twin Window Fan with Remote Control
Holmes HAWF2043 Twin Window Fan
Honeywell HW-628 Enviracaire Twin Window Fan
If you are interested in purchasing any of those widow fans, read on...
I didn't intend to have to do this review because I didn't intend to purchase more than one of these fans. I can tell you now that all of these fans are super cheaply designed and built and none of these fans are perfect, but in my opinion, one is worse than the others.
Holmes HAWF2043 Twin Window Fan: my rating - 3 of 5 stars
I first purchased the Holmes HAWF2043 unit. It was lightweight and fit the window nicely although I had trouble with the extender which is located on the right side. The locks for the extender are located on the right side along the top and bottom edge of the fan, which is supremely stupid because as soon as you place the fan in your window frame and put weight on it, the bottom lock locks and you can not move the extender. I mean, what rocket scientist thought of this? So you have to unlock the locks before you place the unit in the window AND keep weight off the bottom lock until you have the extender adjusted to where you want it. This is not easy. And the lock mechanisms can be difficult to move. At the time, I could not imagine anything worse, but I was wrong as I found out with the extenders on the Honeywell unit, which I will go into in the next paragraph. This Holmes unit has the best placement of the power cord which is in the lower left corner... the location is high enough as not to interfere with the bottom of the window frame. This unit has two speeds, high and low. The controls are easy to operate. In fact, there is only one button and two switches. The button cycles through the high and low manual speed settings and then though the automatic temperature presets which are at 60, 65, 70, 75 & 80 degrees fahrenheit. If you set it at one of the temperature presets, the unit will turn off once the room reaches that temperature. It seemed to work although I did not have the opportunity to see how accurate that function is. The two switches set the direction of the fans to either intake or exhaust which can be done on each fan independently, so you could have one fan on intake and the other on exhaust for quickly exchanging room air with fresh air. This unit has 8.5 inch fans and they are relatively quiet at both speeds, naturally high is louder than low, but don't expect silence. I own a Kill-A-Watt P3 energy meter and this unit used 46 watts on low and 63 watts on high. I would have been happy with this unit except that two days into using it, the right fan started working intermittently. Of course, that is unacceptable. Returning. I give this fan 3 out of 5 stars because I feel that if you get a good one you'll be happy with it, but don't expect anything great. FYI: Holmes is a division of Sunbeam.
Honeywell HW-628 Enviracaire Twin Window Fan: my rating 2 of 5 stars
So with the right fan not working correctly on the Homes, I ordered the Honeywell HW-628. As soon as I saw it, I knew I was not going to be happy with it. For one thing, the unit has 7 inch fans compared with 8.5 inch on the Holmes. So in order to move as much air, the fans would have to run much faster and the unit will be much louder. Time to install... I previously mentioned that the extenders on the Holmes were poorly designed, but the extenders on this were MUCH worse. First of all, this unit has two shorter extenders on both the right and left sides instead of one longer extender like the Holmes has. Second, the four extender locks are, get this, located on the BACK of the unit, the side facing out the window! How are you supposed to set those? It was impossible for me. I ended up jamming the extenders into the window frame in order to keep them extended. Okay, so I finally get the unit in the window and turned it on. I found out immediately that my thoughts about the smaller fans, higher fan speed and noise were true. This thing is LOUD. Super loud. And buzzy. In fact, I'd go as far as to say that it is downright unruly. There is no chance you would use this in a bedroom even on low speed. The controls were easy to use although not completely intuitive. There are three speeds available on each fan, low, high and super high. You have to set each fan separately, which I think is stupid. I cannot imagine a scenario where I would want one fan on high and another fan on low, etc. The temperature setting dial is also extremely stupid. There are no temperature markings. According to the manual, you are supposed to keep the unit on until the room reaches a temperature that you like and then turn the dial back until the unit cycles off. Seriously? Each fan has its own direction switch for either intake or exhaust. The power cord is located on the bottom center of the front of the unit and its mounted too low so that it interferes with the bottom of my window frame. Who is designing these things? The one feature it had which I liked was that the grilles were directional and could be rotated to direct air in a 360 degree arc. On the power consumption front, this unit used twice the power as the Holmes! 97 watts on low, 109 watts on high and 120 watts on super high. My unit was defective in that the switches for the right fan are wired incorrectly such that low is high and high is low, but super high is still super high... odd. Returning. Due to the noise level, I would not recommend this unit. I cannot understand how it has 4 of 5 stars and as of today, 262 reviews. Incomprehensible.
Bionaire BW2300 Twin Window Fan with Remote Control: my rating 4 of 5 stars
So after the poor experience with the Honeywell (They put their name on that piece of junk? They are a defense contractor!), I purchased the Bionaire BW2300 hoping for better luck. First thing I noticed was the similarity between this unit and the Holmes. That is because they are both made by the same company. Bionaire, like Holmes, is Sunbeam. It has the same right side extender locks as the Holmes, but after the experience with the unusable rear locks on the Honeywell, I was happy to see them! One unwelcome difference is that the power cord is located on the bottom center of the front like it is on the Honeywell, and its also too low like it is on the Honeywell. I mounted the unit in window fairly quickly and turned it on. Its got three speeds, low, medium and high. It uses 8.5 inch fans like the Holmes and it is relatively quiet, although I think it may be ever so slightly louder than the Holmes on high. The controls are all electronic and it has an electronic temperature readout and thermostat. It is very easy to use. Simply choose a fan speed and put the unit into intake, exhaust or one fan on intake and the other on exhaust (air exchange mode). You can use it either in manual mode where there is no temperature control or you can set a temperature for the unit to reach and then turn off (automatic mode). This is easy to do using the simple up and down buttons to the right of the large temperature readout or you can use the remote control. Once you set it, it will remember your settings if you turn it off as long as you don't unplug it. The remote control works well and it allows you to control all of the fan's features and functions remotely: on/off, fan speed, air direction, temperature and to toggle between automatic and manual mode. Finally, there is a button to change the brightness of the temperature readout, although you cannot completely turn it off. The power usage was similar to the Holmes. The Kill-A-Watt read 43 watts on low, 49 watts on medium and 64 watts on high. Unlike the most popular review for this unit, my temperature probe was located in its proper track and it seems to work well. I've been using it for three weeks now without issue and so this is the keeper. 4 of 5 stars for this. Its not perfect, but in my opinion, its the best of the three.
The window fan works well for me in the evenings/nights where the outside air temperature drops 10 or 15 degrees but the inside air temperature would stay high, even with all the windows open but without any significant wind or breeze. With the fan on and with the windows and doors set up correctly, the upstairs bedrooms stay within three or four degrees of the outside temp for me without having to turn the air conditioning on. Remember that daily effectiveness of any window fan will depend a lot on the outside temperature and humidity level.
As far as these fans are concerned, I would say either get the Holmes HAWF2043 or the Bionaire BW2300, but stay far away from the Honeywell HW-628. Good luck!
UPDATE - July 13th, 2011:
I've had the Bionaire BW2300 for just over two years now. It's holding up quite well. I use it all the time and it works as well today after two years of use as it did when it was brand new out of the box. The remote control and the full temperature controls are nice! I'm very happy with it.
374 of 379 found the following review helpful:
At this Price - Take it apart and fix it yourself Aug 30, 2004
By Wayne-in-Seattle
We got this fan a few months ago. I read the reviews and was concerned about the temp gauge not working but for the price I gave it a shot anyway. I asked the sales man about the return rate for the produce and he said that not a one had been returned (I didn't really believe him but went ahead with the purchase anyway).
Sure enough I plugged it in and the temp started rising, went up to HI and stayed there. Other than that the fan was great. Quiet, strong, the remote worked good. I went back to the store and saw that the display model was doing the same thing. I couldn't believe that they would design the unit in such a way that the circuits would heat up the thermometer. I figured that some poor kid in the factory had missed a step in the assembly process.
Last night I took it apart and found the thermometer wire. It was laying across the circuit board. All I did was move the wire thermometer away from the circuit board and when I put it back together and plugged it in, it worked like it should have in the first place. Took less than 20 minutes to fix it.
Bionaire Quality Control really slipped on this one. 5 stars for a good product, minus one for the trouble.
If you want to fix it here is how I did it, but if you break yours I accept no responsibility. The instructions state "Do NOT attempt to repair or adjust any electrical or mechanical functions on this unit. Doing so will void the warranty."
UN-PLUG THE FAN. Unscrewed all the screws in the back (7 total I think). Then use a flat-head screw driver to open it from the side that doesn't have the built in extender. I couldn't figure out how to open it all the way but was able to open it about 35 degrees, like a clam, and remove the plastic cover that shields the circuits. The thermometer is the white plastic wire that is only attached to the circuit board on one end, not the round metal thing with a hole in the middle, that is the speaker. I stretched the thermometer wire out to the side, away from the circuit board and the put it back together.
51 of 52 found the following review helpful:
 Quiet and smart Aug 05, 2003
By E. Laneville
This fan is of great value. It will quietly refresh your room during a warm summer night, allowing you to sleep and benefit from air circulation in those houses where there is no central air conditionning. It has 3 speeds and 3 air flow settings (In, Out, Exchange: one fan works in and the other out to exchange the room's air with the outside air) to rapidly get the room to the desired confort level. It also has an Automatic mode that controls the fan's operation until the desired temperature is reached. This feature is not ideal since it will have the fan starting and stopping every 2-3 minutes when the temperature rises back to above the desired temperature. Altogether, I am very satisfied with this fan, even though I do not use the Automatic feature. It is exceptionnaly quiet I find and the air flow features get the job done in no time.
31 of 33 found the following review helpful:
 Thermostat heats itself Jun 28, 2004
By J. Beard
"jimbeard"
I have one of these, bought 2 years ago: it works beautifully. I bought another this week, and the thermostat feature was completely unusable. I tried 2 more (all were from the same store, this year and 2 years ago); all of the new ones would show the correct temperature when first plugged in, and then the temperature shown would rise, generally to about 15 degrees above the ambient temperature. The control unit on the new ones seems to generate heat, and in fact one time it felt warmer than the rest of the unit; this is true with the fan off and only the thermometer functioning. The same problem is seen with the fans on--the temperature reads erroneously high. This makes the thermostat feature, which ranges up no higher than 80 degress F, useless. This is because the fan thinks it's 80 when in fact it's 65. The fan functions very well as a simple remote-control fan: strong, quiet, flexible. But since I bought it for the thermostat feature, which no longer works in the three current examples I've tested, I give it a poor rating.
20 of 21 found the following review helpful:
Do NOT buy this product unless you are mechanically inclined! Jun 19, 2007
By Software Developer
I, like several others who have purchased this fan experienced the same problem with the thermostat. From the moment I turned it on the temperature indicator continued to rise (instead of decline) even though it was 65° outside and 75° inside.
Having read the reviews prior to making the purchase, I made the mistake of assuming that the poor design and assembly would have been corrected since almost three years had passed since "Wayne-in-Seattle" first posted his problem with the thermostat back on August 30, 2004.Bionaire can rest assured that this will be the LAST of their products I will ever purchase!
Correcting the problem is fairly simple; all you need to do is reposition the temperature sensing wire inside the control panel so the heat generated inside does not influence the temperature sensor. The only tool you will need will be a small Phillips had screwdriver.
Remove the seven screws on the back of the unit. You will not be able to completely remove the back panel unless you can figure out how to do so without breaking the accordion expansion panel on the right side of the unit. You will however be able to separate the back from the front enough to remove the control panel cover inside(no screws involved). Once inside you will see two white wires that are connected to the circuit board. One of those wires is approximately 3 inches long and is only connected to the board on one end; the other end hangs freely; this is the temperature sensing wire. The last inch of this wire has also been stripped of its coating and taped.
Carefully reposition the the wire toward the top of the unit, pulling it taut so that no part of it touches the circuit board, taping it if necessary (approximately 1.25 inches will stick out when you're done).
Replace the control panel cover, screw the unit back together and you are DONE! The next time you turn it on the temperature indicator will be displaying a more realistic value.
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