The 2500 cfm fan uses less power than the 1500 cfm? and haf of the 1600 cfm? Am I missing something here?
1312451
(after my first comment) I now see the 2500 cfm fan uses an "efficient PSC motor"...and costs $10+$12=$22 more, so it is a special motor giving it high efficiency.(apparently larger blades too) Wiki says : "PSC motors (permanent-split capacitor) are frequently used in air handlers, blowers, and fans (including ceiling fans) and other cases where variable speeds are desired." ...or for improved efficiency apparently. So I now say "it's the special motor"..... I also see the numbers are misleading, so read all the details.. the "1500" moves 1300cfm for a 1850sf attic, and says 3.4 amp, but also below says 2.6 amp! the one I bought. The "1600" actually is a 1600 cfm fan so it says, for a 2400sf attic at 4.5 amp, and seems to be 15"x15". The "2500" relates not to the cfm, but to the 2500sf attic! only 100 more than the "1600" model... with amps supposedly at 2.1, but listed as 21"x21". good luck.
1312452
You should actually look for the amp draw on all fans. The higher amps the higher out of pocket exspense. I would say you have it backwards. It takes more amps to move more cfm.(Cubic feet per min)
1312453
A larger fan turning more slowly can move the same volume of air at lower cost, assuming you do not have a restricted flow somewhere in the system. If you have only enough space to install a 15" fan, the 21" option is meaningless.
1669408
Not significantly. If you are looking for a quiet solution and are somewhat electrically savvy, try wiring two fans in series and ditch the speed controller. I found this configuration was much quieter (practically silent!) than using the fans on the low setting of the speed controller, and still moved a surprising amount of air. The speed controller is not a very "elegant" design, and causes the fans to emit a buzzing or humming noise at low speed.
1132048
In my experience AMDs run hotter. I had an aftermarket fan with a nice solid heatsink and larger fan that I used as the stock fan heat sink seemed a bit thin. I can't say it wouldn't be good enough my last 2 AMD cpus I used the stock fans and never had an issue.
1237795
When I surf the web the laptop is using the 4600 on the cpu and fan is silent. (no heat = no fan)When I play games and use the 780 the fan is on low to med. still quiet the only time it makes a lot of noise is when you hit the fan overdrive button and I only did this to check it out, not because it was needed.
1294306
I checked with another supplier(Amazon has the best price for sure). They list amps for a 1300 at 2.6 amps, a 1600 at 4.5 amps and a 1650 at 2.4 amps. Confusing becasue at higher capacity fan shoud draw more amps. There was no listing for the 1500. I have these 1500 fans and they work well. Whatever amps they draw is worth the savings in cooling cost inside the house. Not really a direct answer, but hope it helps. Advise to check the Ventmatic web site in another answer is good advise.
1976222
This booster fan is much more powerful-- the cheaper fans use something similar to what you would find in a desktop computer. It isn't that loud either. I ended up returning mine. It didn't really make any difference for the room we were trying to regulate. However, this wasn't the fault of the fan, it was due to poor HVAC design.
2214402
According to the product description for this same fan over at Sears.com, it's pushing 179 CFM.Power requirements are needlessly hard to come by. Hengs Industries doesn't even list it on their site.
860857
Honestly if you have a fan controller it doesn't really matter sound wise, more or less the same but with different fans. I changed my fans out on my h100i to SP fans(loud) and I have them running slow and quiet. Temps... Meh not an issue at 4.5Ghz X99 Haswell-e ...
2162348
My experience: I have a fan-less PSU and the stock setup is adequate. However, I do not use their included fan splitter, because my motherboard supported multi-zone tuning (no evidence that this is better/worse... YMMV). Fans are off/low most of the time under normal load. Hope this helps...
1954807
Joan,I measured the first of the two heaters I bought using a Kill-A-Watt meter. It said 7.5 Amps on Low and 12.5 Amps on high, so that would be 900 Watts and 1500 Watts on high. The fan always is on "high", which to me is a benefit because the volume of air is the same, just warmer or cooler. Or unheated, if you use the fan-only setting.Martt
1906991
The one I got booted up fine and was nice and quiet during idle on the desktop. But load up an intensive game, and the fan was very noticeable. I could hear it from outside the room, down the hall, and downstairs. I returned this M12II and got a Seasonic X-850 GOLD Seasonic X-850(SS-850KM3 Active PFC F3) 850W 80 Plus Gold ATX12V/EPS12V Power Supply instead, and have been happy with it for the last 2 years and counting.
612222
I run it on f2 and it is not any louder than a normal fan. F3 is a little louder but no need to run it on f3. I forget it is even running.
466340
I don't think it was designed like a laptop where there is no fan speed at all until the processor reaches a certain temperature. Mine runs all the time as well, but quiet with no load, louder with a load. The fan speed change is immediate too which shows to me it is load driven, not temperature driven.
998711
It seems that the fans are not working properly to match the energy that is consumed by the equipment. I haven't had the time to check with the Optoma Tech Services to check if there is an option for those fans/coolers.
89536
Cody.. Which fan did you end up purchasing. Doing the same thing. Current fan I am using is not powerful enough.
637859
To be honest, i don't know. Couldnt tell a big difference in my bill. I do not compare this to an air cooler though. Unless mine doesn't work properly, it is no different from any other fan to me. I had bought it because everyone was saying it was like an air cooler. I could of bought a cheaper fan the does the same thing. Just so you know.
1421494
You're definitely right! I think the chip outputs too much heat. What I did is undervolted the cpu from the BIOS and also disabled the AMD Turbo Technology, and now it's so much cooler and quieter. Temp on idle around 30-35 load 50-55. Lowest degree was 25. That's insane with the stock fan!