"Al" wrote in message news:y%FAi.3596$ku.3125@trnddc03...
one of my units (I have two swamp coolers) has an 6x5 foot pad that is 8
inches thick and a water reservoir that holds about 15 gallons. If the
water intake valve is shut off, this reservoir will go dry within the day.
This tells me that in a 24 hour period I use at at least 15 gallons of
water times 2. This does not include the bleed off tubes and the
miscellaneous drips and spills which dumps out of the system who knows how
much water per day so I don't get crusty buildup.

I would think since it uses evaporative cooling it would have to go through
some water to be effective. And with fans running that coolness would be
sucked out as fast as the swamp cooler cools it.