[Shop-talk] air conditioning misting system

[Jimmie Mayfield]

I think I posted to this list 3-4 years ago about some of my experiments 
with this.  I was scheduled to have a new pair of heat pumps installed 
later that week so I wasn't concerned with ruining the coils.  When 
directly misting the coils, I recall measuring a ~30% drop in current 
drawn by the compressor.

I agree, though, that this is probably a bad idea long term.  At 
minimum, I'd expect scale to build up on the fins and that'll have a big 
effect on heat transfer.  But even if you're using distilled water, I'd 
expect to see increased corrosion where the aluminum fins contact the 
copper coils because you're subjecting those junctions to constant water 
(more so than normal condensation).



On 08/09/2017 04:32 PM, john niolon wrote:
> Anyone have any experience with the mister systems you install on your 
> evaporator coil in your outside unit... good, bad, waste of time.. or 
> how many thousands of dollars and kilowatt hours have you saved... 
> internet hype makes them sound like the best thing since they put 
> pockets on shirts...
> john
>
>

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