I continue to ditto Ray these days.

I just spent some bucks on 2 large (18") floor fans.

The idea is that the cooler moister air is at the floor, so move that in
Horizontal Air Flow (HAF) pattern across the floor where it hits the
opposite wall, turns and then moves across the ceiling to return to the fan
to be returned and recycled.

I've had this installed for all of one week in the greater Bay Area of
California where we've been having mixed weather patterns. Yesterday the Gov
threatened brownouts becasue it was so hot people had the gall to use their
air conditioners and today its cloudy and overcast and cold - go figure.

Anyway, my point was to be that even with these weather patterns the
thermometers in the GH never rose as high as they did when I had just one or
two 16" fans on poles set to 'oscillate' and a 54"ceiling fan.

The plants dry off, the moisture from the misting system seems to get spread
more evenly around the plants on teh wet side of the GH, and there seems to
be fewer puddle areas on the floor.

It sounds like an airport hanger in there now, and there is definitely a
breeze - (wind tunnel-like) that all my friends on OrchdSafari say should be
the way a GH should feel. It doesn't smell closed-in anymore.

I'm happy.

K Barrett

All due to HAF.
"Ray @ First Rays Orchids" wrote in message
...
I have been happy with the following for many years:

For 24-hour circulation, large (20"-24"), cheapo "Breeze Boxes" available
at
any K-Mart, Mall-Wart, etc., suspended about two feet above the benches,
and
set to create a constant circulation (facing one direction on one side,
the
other direction on the other side). Usually less than $15 and last a
couple
of years before they die in the wet environment. I don't even shield them
from the misters!

As far as ventilation is concerned, I have shutters that open when the
interior temp gets to about 70°. Both ends, protected with screen.

If the temp continues to climb, I have a giant, belt-driven exhaust fan
that
kicks in. It is sized to exchange the contents of the GH twice pr minute
(i.e., for a 5000 cubic foot structure, a 10,000 cfm fan.)

--

Ray Barkalow First Rays Orchids
http://www.firstrays.com
Secure Online Ordering & Lots of Free Info!


"bb" wrote in message
...
Ok, the orchid house is just about done. Last roof panel finally went
up yesterday after being on back order for two weeks. Floors were
sealed and stained semi-transparent white. I had figured to get the
floors done in two to three hours last Sunday and ended up spending a
full ten hours on it. The thermometer on the wall was reading 98 most
of the day.

Anyway, I'm down to installing the screen on three walls. Today when
I stopped home for lunch the old wall thermom was reading 94. I think
my next priority is going to be installing fans for ventilation.
Anyone have suggestions?

I figured on going with a couple of outdoor ceiling fans, but another
orchid house owner said he gets much better results with floor fans.
What does everyone use, and what are the results?

Thanks for any help.

bb