CFM to LFM to m/sec

[sun-shine-]

Hello good People,
Please help me :
I need to know how to invert CFM to LFM ( its wind units for fans)
and CFM to m/sec
and if there is another unit for air movement please let me know how to
calculate it.
Thank you
Keren

[Onestone]

1CFM = 28.31684659 LFM

I don't know how m/sec could be quoted, as the air velocity is a
function of the environment largely. It might be cubic metres / second,
which I have heard quoted for air conditioning systems, in which case 1
cubic m/sec = 1000 Litres/sec or 60,000 LFM or approximately 2,000 CFM.
Hope that helps.

Al

[Rich Grise]

Pardon me for kind of interrupting, but isn't LFM "linear feet
per minute," so converting from it to CFM (cubic feet per minute)
or back would depend on the cross-sectional area of the air
stream? Now, Linear feet per minute can be translated into linear
meters/second, like this:
(fixed font)

lin ft 1 min 12 in 1 m m
x ------ * ------ * ------ * -------- = y -
min 60 sec 1 ft 39.37 in s

and of course CFM, cubic feet per minute, equals LFM * area of
the moving air flow.

Hope this helps!
Rich