How the heck do Akasa Apache fans have so much static pressure

[Jedicake]

I thought the main factor in a high mmh20 fan was broad fan blades to prevent push back. The akasa apache blades really look like an airflow fan, but it's mmh20 is an impressive 2.76 (unless they're lying about it)

 

Can I get some opinions on this

[SirRoderick]

Well here's some listed over at frozenCPU http://www.frozencpu.com/products/10345/fan-675/Akasa_120mm_x_25mm_Apache_Black_Super_Silent_PWM_Fan_w_Hydro_Dynamic_Bearings_-_Black.html

 

I'm fairly certain those numbers would be reliable then. What I do notice is the unconventional shape of the blades, might be a sort of hybrid effect with the relatively wide tips.

[Rorgash]

looks normal to low for me 57.53

[daemonowner]

The 3000RPM industrial NF-F12 has 7.63 mm H2O.

[Jedicake]

The 3000RPM industrial NF-F12 has 7.63 mm H2O.

OH HOLY CRAP

[Prokart2000]

The 3000RPM industrial NF-F12 has 7.63 mm H2O.

[jameshumphries47]

 

The 3000RPM industrial NF-F12 has 7.63 mm H2O.

 

Woah that's high,

[Jedicake]

Woah that's high,

Yea I was just thinking, 3000rpm and 7.63 mm h20 is pretty average for a typical static pressure optimized fan, I could be wrong though.

[jameshumphries47]

Yea I was just thinking, 3000rpm and 7.63 mm h20 is pretty average for a typical static pressure optimized fan, I could be wrong though.

i quoted the wrong post i meant to quote the 

 

looks normal to low for me 57.53

[KamiKatze]

The noise levels are probably not true.

[daemonowner]

The 2000RPM has 3.94 mm H2O. The normal NF-F12 has 2.61 mm H2O at 12V, and 1.83 mm H2O with the LNA. Take from that what you like.

[Lays]

The 3000RPM industrial NF-F12 has 7.63 mm H2O.

 

 

They also claim the normal NF-F12 is like 22.6 db, yet it's ~53 >.>

 

 

SOOO many fan manufacturers lie about their specs, not quite sure why

[airdeano]

@Lays

 

but we don't know their testing methodology. they may be using a silent room

and others might be using nothing but room ambient noise. in those cases,

you'd have to compute the delta to arrive at some noted levels. in this day

of righteousness in marketing, they'd have to have sort of data to support

their claims. which 90% don't have available or a guesstimate of specifications.

[Lays]

@Lays

 

but we don't know their testing methodology. they may be using a silent room

and others might be using nothing but room ambient noise. in those cases,

you'd have to compute the delta to arrive at some noted levels. in this day

of righteousness in marketing, they'd have to have sort of data to support

their claims. which 90% don't have available or a guesstimate of specifications.

 

 

Yeah, I wish we did know the testing methodology tbh

[Leonard]

I thought the main factor in a high mmh20 fan was broad fan blades to prevent push back. The akasa apache blades really look like an airflow fan, but it's mmh20 is an impressive 2.76 (unless they're lying about it)

 

Can I get some opinions on this

I have researched this and the manufacturer says it is because of the blade design and i can tell you the 120mm works great  and the 140mm version are the best i know of.

 

looks normal to low for me 57.53

He is talking about the static pressure not the CFM.