PUSH thru Iceflow boxes, PULL thru hoods, Grasshopper!
You wont get condensation unless your water gets below the dewpoint in your garden. This is typically between 55-62 degrees in gardens, depending on temperature and the humidity in the garden.
Pulling is better for condensation collection too, less spraying for sure.
Couple of things here: One, Just by happy accident I put my Iceflow boxes on an angle, and they drain most of the condensation off nicely. The rest does spray out and onto the floor, so I keep a towel down there. This does a good job of regulating humidity, lol.
Two, I've seen people suggesting that you pull air thru the iceflow boxes, and I have to respectfully disagree. Here's why: Anytime you run a gas- like air- through a fan (or any other compressor section), you're HEATING it. This is why when you PUSH air through your hood vents, the ducting and the hoods get hot. So don't do it, lol.
The Iceflow box is the opposite situation, hower; you want the compressd, heated air to pass through the Iceflow box to get the maximum temperature differential, thus maximizing efficiency. Then when the air decompresses (slightly, but it counts for a lot!) as it passes across the cooling core in your Iceflow box, it will be cooler than if you pull air through and then heat it on the way out with your fan. Don't believe me? Try it both ways, and let your hand or thermometer tell you which works better. Besides, I don't want condensation drops sucking through my expensive maxfans, so I wouldn't pull through even if it didn't work better.
This is known as 'Uniform Gas Law' in physics, and if properly utilized it will drastically inprove the efficiency of the cooling systems you use. Used improperly, well, you'll find yourself trying to overcome physics with horsepower and while that's possible, it's always expensive.