Air Throw

Hi all,

How to calculate air throw from fan(s) ??

The easiest and best way is to measure it.

You need an Annemometer & the rest is easy

Sorry, I mean mathematically...

Sorry, no idea.

I always ask the manufacturer for those sorts of details.

Otherwise it is a case of measuring the airflow yourself.

The short answer is yes there is a formula that can be used , but it requires a fair understanding of what you want to achieve , in what context it is to be used and the basic design of the air distribution system. There are many factors that effect this , temperature TD between inlet air are general area. Ceiling effect, geometry of the outlet, i.e. square round grill louver etc.
I have used the formula in the past to approximate what I am attempting to achieve and normally in an internal air con. design to determine entrainment and flow rates in the occupied zones, but in the final wash up of the design selection I always use manufactures published data and select or specify accordingly. I haven't got the formula in front of me but could dig it out if you want me to or someone else may have it at hand.

Thanks guys.
John Hunter, u don't have to dig it out. But thanks anyway.