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Question: How powerful is this fan?  I don't care if it's loud, I just need something really powerful.  I bought 2 window fans from Target today and hated both.
Document: I wonder if Holmes has lowered its fans' capacity because people wanted lighter-weight and maybe quieter fans? If so, they have sacrificed the cool air that is really the goal of having a fan in the first place.If anyone knows of an oscillating, powerful window fan, please tell me the make and model. I'd rather spend more on a fan that will work well than keep buying these cheaper, weaker ones. Thanks!
I really am glad I bought these window fans. I have a manual one that u have to flip when choosing between exhaust or intake. This version is much better and much quieter... More efficient and definitely keeps my 2nd floor cool . granted it won't do much for a more than 1000sq ft but if you have two going it works well. I've even decided not to get a portable ac becoz this cools really efficiently.
I recently compared the Holmes and Honeywell (Kaz) twin window fans side by side. Both were reasonably quiet, electronically reversible, and were similarly priced (Lowes and Target, respectively). The Holmes fan is more attractively designed but the Honeywell had 2 to 3 times the blowing strength as the Holmes. Also, the Honeywell fan (but not the Holmes fan) has angled louvers which can be turned to direct the flow from each fan in a different direction.
Vast improvement over their earlier versions. Two 6 blade fans, independent speed & directional controls & a thermostat. Good value, I bought 2.
All you hear is the sound of air. My digital fan started making noises at lower fan speeds.- Reliable. I've been using these fans for over 10 years.Cons:- The price has doubled since I bought my first one.- The plastic window extenders will become brittle after years of use. I've replaced them with a piece of plywood cut to fit.
I bought 2 fan for the house. I have 1 that quite working after 3 weeks of use. Besides that they'er ok.
I think if you just need a quiet little fan you will be happy with this for your window. It doesn't sound like a 747 in the bedroom!
I have it on exhaust and on high, and it sounds like the hum of an air-conditioner. Something I can live with as long as it cools off the room.Performance-wise, my 10x14 room called off within minutes of installation. Thankfully,  I bought two and put it in the other bedroom as well. Works perfectly for SF Indian-summer days.
I looked specifically for dual switches for intake/exhaust and dual controls for speed and a fan that would sit securely in my window and this works perfectly! It's relatively quiet white noise in the evening and really draws in the air to keep the bedroom fresh and cool.
I am extremely pleased with this item. It does all it claims with exhaust and intake systems working independently on each fan I feel i have a combination of 2 exhausts,2 intakes, or 1 exhaust-1intake all in one unit. The performance levels are great and the volume of the fans in use are barely louder than when it is turned off. If I did not have central air conditioning throughout my home this would be a feature in each of my rooms.
Answer: power is one thing, but if the incoming air doesn't have an exit to move the air through the room the fan doesn't work very well.so remember the airflow through the room is just as helpful as the "power" of the fan