for Snapmaker U1 Nozzle 2 PCS 0.4mm U1 Hotend Full Assembled Plug&Play Ceramic Heating Block Rapid Heating Leak-Proof Design for Snapmaker U1 Extruder Kit Hardened Steel Nozzle 3D Pirnter Accessories

You could, but in reality, when you are printing ABS/ASA you want the air to stay inside your enclosed space, that thing would suck the air out. Ideally it would be turned on only after the printer finished. But those tents are usually used for Bed Slingers, not Core XY printers. It's not that they can't be used with Core XY, it's just that it's easier to enclose the Core XY with other things, like an acrylic panel, the top cover (in the case of U1), etc. There are still leaks, of course, it's not a perfect seal, but it does not need to be. A Nevermore or BentoBox will keep re-circulating the air inside the enclosure, that will promote more filtration, and as a plus, it will help with heating the chamber, as the air will be more agitated inside and you are not sucking out air to your outside environment. Of course, a proper heater, like the panda breath will heat more adn faster, but for the most part, we can do with just a bit of recirculating air. My personal upgrades for my U1 were: BIQU PopCap (which works really well, and it's pretty, but it's quite pricey, it's better than the tent IMO) BIQU Cryogrip and Frostgrip (one for PLA/PETG and the other for general usage, but I found out that the regular plate actually bonds pretty well with everything, so, if it was today, I would get just the Cryogrip) Motherboard fan upgrade (I used this simple one, because it is less intrusive, but if you want, this one is better. This is required when you keep the printer enclosed. If you use a tent, it will make it harder to keep things that should be cooled, cool. Hardened Steel nozzles from Amazon (https://www.amazon.com/dp/B0GHQC2ZNC?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_1&th=1) haven't tested yet, but this is needed for some filaments, like Carbon Fiber and Glass Fiber filled, and glow in the dark.

What I got for mine so far: BIQU Frostbite BIQU Glacier Hardened Steel Nozzle BIQI PopCap I like the Frostbite, it leaves a pretty nice glossy finish on the base of the print, and with the PopCap, I can leave it closed and reduce the bed temp a bit, so the PLA does not clog and the noise reduces a bit. The Nozzle and the Glacier I haven't tested yet (arrived today), but their built quality seems really nice. I will probably get a spare Toolhead 1 and Toolhead 2/3/4 just to keep it here in case one fails (hate that they have 2 different toolheads btw). I also installed the Paxx12 firmware, as it brings some cool new features, like a better bit rate for the camera and remote access to the printer screen. So far I'm loving this printer. I considered the Creator 5 Pro as well, but at the end I liked the U1 more, especially because the fact that they apparently have a pretty nice support and also are engaging with the Open Source community, which Flashforge apparently don't.