Others say...

"This sucks, really."
Like me, you might be thinking that this is the perfect solution to your problem and maybe, just maybe, it will work for you. I thought the same thing just praying that it would work.

No.

Its a great concept. The problem is that it just doesn't work. I sat with this thing the better part of 8 hours just tweaking and retweaking. According to my digital thermometer in that room I never gained more than 2 tenths of a degree.

One problem is that this is just a small fan that conveniently fits over your register. When you take warm air and run it through the fan...you guessed it, you are now blowing cool air.

Another problem is that its nearly impossible to sync to your furnace. It has one swith that you can adjust increment by increment so that it hopefully will turn on when your furnace does and turn off similarly. After 8 hours I came close. But there is still a solid 60 seconds after the furnace shuts off that the fan is still going. So rather then now turning warm air to cool it now blows COLD air...defeating the entire purpose.

I am going to do what I should have done to begin with and thats install an inline duct booster. The only problem I see with that is that they are all made by Suncourt and after this Register Booster debacle, I'm not sure I trust the Suncourt name.

"Works great with wood heat!"
I have a Charmaster furnace at my cabin.It burns propane or has a wood box. When burning wood, you need to manually turn the blower on the main furnace on(and off) to circulate the hot air in the plenum. Once the hot air is started the Register Booster will continue to "pull" heated air for as long as the plenum and ducts have hot air - can be for hours! It's much cheaper to run than the furnace blower and I can leave the EQ2 on when when I'm not around which you can't do with the furnace. I put the EQ2 in rooms with poor circulation and have even heat through out the cabin (the cabin is an older two story five bedroom structure). Definitely worth the investment in this situation.

"Luke Warm"
I purchased this item when we were having 110 degree F. air temp. in Arkansas and our A/C just couldn't cool our living room below 78 degrees F. The room has a cathedral ceiling and about 25 ft X 15 ft. Our general impression was that it helped somewhat - but did not make a remarkable difference. This could be b/c the heat was so extreme that nothing would have helped. Our A/C is practically new and works well, so I'm not inclined to blame it. I would predict that the smaller the room and probably one w/o a cathedral ceiling would be ideal for this product - it definitely brings the air up and out better. Also, if you live in an area with desert or tropical conditions where temps are extreme, you'll likely feel 'luke warm' about this Register Booster. For the money, I'd do it again. We'll continue to experiment with it - maybe putting it in different rooms to gauge it's effectiveness. But, I'd say that if you have a large area to cool (and you know you're A/C is working properly), you may wish to invest in a air flow booster that technicians place in your duct work.

"it works for me"
Based on the other reviews, it sounds as though the EQ2 works for some people and doesn't for others depending on their individual room and HVAC configurations. I have an upstairs room with a vaulted ceiling that is 10 degrees Fahrenheit hotter or colder than the rest of the house. The room is more than 200 sq. ft., has only one vent, and is the farthest from the blower. I've had my EQ2 now for 3 years and it is still working fine. The EQ2 brings the temperature difference down to about 4 degrees, which is livable. I tried out the AirFlow Breeze that has 2 DC fans in it but it didn't work as well as the EQ2.

"Works great when you know your problem"
Like everyone else I have a room that doesn't get the benefit of enough heat. Is is fed by a side duct off the main furnace duct - really a bad design because the heat on its way up three flights races past this duct and even a scoop doesn't cure the 5 degree deficit. I put this fan over one of the two outlets for this side duct, AND BLOCKED THE OTHER to prevent the fan from just pulling air from the other vent. It now has to pull from the furnace and the 5 degree difference disappeared. It is also on a thermostatic control.