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Old 06-09-2012, 06:45 PM   #51
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After reading your edit I'm not sure what I was looking at but you are correct... 48cfm per fan is great! CFM was my main concern, but with a total of 192 cfm a switch to control each fan makes sense. Lower ambiant temps would let you use fewer fans. I was never abdicating that MY fan was the ONLY answer and after seeing a 192cfm, 4 fan setup for that price, I would have to say it would be an excellent choice where the space allows it.
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Old 06-09-2012, 07:05 PM   #52
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Quote:
Originally Posted by bob213 View Post
After reading your edit I'm not sure what I was looking at but you are correct... 48cfm per fan is great! CFM was my main concern, but with a total of 192 cfm a switch to control each fan makes sense. Lower ambiant temps would let you use fewer fans. I was never abdicating that MY fan was the ONLY answer and after seeing a 192cfm, 4 fan setup for that price, I would have to say it would be an excellent choice where the space allows it.
Yeah.
30 years as a design engineer pounded into my head - many
times - that _everything_ is a compromise / tradeoff. In this case,
the main variables are price, airflow, size, power and sound level.
There are likely many acceptable combinations depending
which of these are important and which are less so. Everyone
will likely want a different ordering of the factors.......

I always remember the poster that some engrs would put
above their desk:
++++++++++++++++++++
GOOD
FAST
CHEAP
Pick any two.
++++++++++++++++++++
So very true............

cheers,
johnd
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Old 06-19-2012, 12:01 PM   #53
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Quote:
Originally Posted by dnaraG_1M View Post
GOOD
FAST
CHEAP
Pick any two.
John,

I have lived life with that credo (along with some others). It sure is true!

I considered using a rotary switch and a diode matrix to individually control the gang, but decided to go with simplicity: all or nothing.

I guess it had something to do with a transition from the analog world to the digital.

You supply the skiz and I may consider duplicating that controller!

Mama stayed very happy with her 'fridge temps this past weekend, where it got to just 100* on the hi-dez in Victorville, with low humidity.

Pop
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