Came up with the following idea for cheap/easy "cooling"/"venting" solution for both new canopy and sump compartment currently under construction.
Ordered 4 large size computer CPU fans from KD computers
http://www.kdcomputers.com/
Best (volumn/noise"

for $ is the:
Sunon 120mmx25mm 4 -wire 90CFM
Part: 550-002 Price: $11.00 ea.
Sunon ball bearing 120mm x 25mm- 4 wire. 90 CFM 44.5 dBA 3100 RPM
Hook up to old computer power supply mounted in sump area and away you go. (fans are 12v DC) Connectors to fans and power supply are standard. Single power supply can run all four (2 in canopy - 2 in sump area)
Cutting holes in sides of canopy and stand to mount. Plenty of grill covers to choose from on site. (some very fancy - and others available elsewhere, just "google" - "cpu fan covers"
Getting really fancy, can connect "power supply" to in line thermostat so they run only when needed...
i.e. (From Harbor Freight)
PORTABLE HEATER/COOLER THERMOSTAT http://www.harborfreight.com/cpi/cta...emnumber=90870
Plug this thermostat into any 120 volt outlet and you can control the operation of any 120V heater, swamp cooler, fan or air conditioner.
Temperature settings from 30° to 110° F
Easily mounts to wall for use with stationary units
UL listed
Not for use where national electrical code #547 control is required.
ITEM 90870-0VGA
$39.99
Fans shipped quick & they are very powerful and "quiet"
FWIW
OmarD
If interested in doing & need help finding adequate power supply, let me know, have a couple laying about. Can work out "deal" easy

- Om