Managing Heat in Basement Mining Setup

So I’ve got 2 ASICS, but I'm only running one right now. The basement's getting super hot with the outside temps rising. My setup includes a Silencer box with two heat vents, one of which goes to a duct that vents heat out the window. Still, the basement is sweltering. How can I improve this? Check out the pics in the links below. There are two small windows in the basement; I cracked one open to let in some fresh air. The other window has a hose barely fitting through it. Keep in mind, I can’t make any permanent changes since it’s a rental.

taller shelf with  shorter tube. also that tube is not ideal if it has no insulation. https://www.homedepot.com/p/Master-Flow-8-in-x-25-ft-Insulated-Flexible-Duct-R8-Silver-Jacket-F8IFD8X300/202562741 the home depot will keep the heat in the tube. I would want the miner to be on a five or six foot shelf right under the window. and the tube could be six feet long out the window. I would also use two or three feet of tube on the intake. even if the same shelf is used bring in right under the window to shorten the exhaust .