Ok in this thread we'll discuss about units used by the simulator.
As this program is not meant to be used in the U.S.A only, and since the USA are the only place in the world where non metric units are still used, i'm 100% for using metric units only.
Pressure:
mH20 is metric indeed, though not SI. As it's easily understandable, and since one can visualize it easily, i think it's a good choice for *every* pressure. Pressure from the pump, and pressure drops everywhere.
Pa is the SI unit, allright, but we're using water only here, so mH20 is totally relevant IMHO.
Flow:
lph (liter per hour) or lpm (liter per minute) for pumps. lph make sense since the mfgers give that figure, and the 'per hour' is consistent with other units here.
Here in EU fans are advertised with their m^3/h (cube meter per hour) rating. 1 m3/H = 1000 lph.
For examply the Papst 8412 is given at 69 m^3/H.
Temperature: °C (celsius) or K (Kelvin) - they're the same basically. K is the SI unit and only differs by an offset. We can keep °C so ppl with little scientific background can understand...
Power: W (Watts) (i'm amazed that even Americans are using this decimal, metric unit
)
Thermal resistance: though °C/W is a commonly accepted unit (and metric), i don't think it's the real unit that applies there. I think its Ohms (omega symbol).
But the tool is aimed towards PC watercooling enthusiasts. °C/W is easy to apply to real cases, and work just like ohms (they add up in series etc.) so i vote for keeping it.
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For you Americans i propose a small (separate) unit conversion program, so you can convert those metric units in gallons, feet and other farenheits.
There are many sites who do that BTW.