GFK-160A High CFM Blower Fan Kit - 160 CFM Cooling Fan Unit for PC, Server, and Electronics Cooling - Perfect for Gaming Rigs, Data Centers & Workstations

*UPDATED 2012-Dec-28 (at bottom)*For reference, I installed this on a HeatNGlo 6000C-IPI fireplace.Installation is pretty easy, just follow the wiring diagram. The blower seems very sturdy and securely built.The hardest part of assembly is that the fan body barely fits through the opening at the front of the fire place. You have to align the blower output with one of the notches in the sheet metal on the face of the flame chamber. There is a screw sticking down just behind the opening which adds to the jockeying. On the upside, this unit comes with magnets on the bottom of the feet so that it stays put and sticks in the location you place it at the back of the fireplace housing. Good thinking on someone's part.The speed control fits nicely into the stock manufacturers bracket. Unfortunately it is not accessible once the fireplace cover is put back in place.The temperature sensor mounts onto a threaded post about 6 inches to the right of the speed control bracket. Our unit waits until the fire place is thoroughly warmed up before it starts blowing. It does keep blowing for some time after the fireplace has been turned off. Timing isn't perfect, but it's a lot better than managing it manually.The blower is a little louder than I would like, even if I turn the speed down to reduce the noise. If I turn it down to significantly quiet the blower, it slows to the point where it seems like the blower is not doing anything at all. This seems to be related to the sheet metal squirrel cage fan style, its just a noisy design. Maybe a trade off for durability. When listening carefully to the unit, the noise seems to be mostly air noise from the blower, not from air rushing through the rest of the fireplace.In my opinion it could be a lot better (for sound sensitive customers) if it were constructed of a row of ~4" silent computer style fans across the front opening, instead of in the back. This would prevent internal re-circulation at low fan speeds, and total CFM could be higher, while blade speed and noise would be reduced.In the end, we bought a second one for our parents house as well. After reviewing the other items on Amazon, nothing else popped out as being inherently better at keeping noise down. Other designs seems to be based on the same squirrel cage fan style, which I think is the source of the noise. This one is probably just as good as any of the alternatives... until someone targets sound sensitive customers...*UPDATE 2012-Dec-28*Installed a second unit at my parents house. It seemed quieter than the unit at my house. At first it seemed like quite a large difference. After some investigation two factors stood out. First, I may have set the fan speed on their unit lower than ours. I was setting it based on how hot the surface of the mantle above the fireplace was to touch, preferring not to over cook the painted surfaces above the fireplace. Natural convection current differences may explain why I needed to set ours higher... or other factors where affecting the result... or I was just off. This wasn't scientifically controlled. Second, their living room is carpeted with an 8 foot ceiling while ours is hardwood with 17-18 foot ceilings. The larger room and lack of carpet may allow the sound to carry much further and seem louder than it really is.Between the two factors above, I've upped my rating from 4 to 5 stars. I think I allowed circumstantial factors to pull it down the first time around, and I like quiet. That being said, the elusive 'better mouse trap' is still possible. Manufacturers take note!