Is this plastic tube big enough?

[Hugsplox]

Upon further study, a CHE will be mandatory. Ambient temperature is around 70 here in the basement where he lives, and it will only get colder going into winter. Rather curious that there isn't even a hole cut out of the lid in the image though, the heat is strong enough to go right through it without melting?

Also I've had trouble making air holes in the sides of the tub yesterday. Tried using the heated head of a glue gun and heating a screwdriver to melt open openings but neither made so much as a dent. I figure I'm either going to get a soldering iron or try a method I saw on YT where a metal pipe was put over an open fire and pushed through the plastic to make holes. Probably the former since I need to go to the store to get more heat-resistant tape anyway.

I've found the heat from the CHE will heat up the lid and the air in the enclosure with no issue. As far as air holes, I've always used a wire clothes hanger. Cut the bottom of it with a pair of tin snips or wire cutters, and then just heat it up with a candle or something similar, obviously exercise a lot of caution here as everything will be hot, then just push through the sides or top to create your holes. This works a lot better than a screw driver because your pressure point, the end of the wire hanger, is much smaller and doesn't require as much heat or force to penetrate the plastic.

Just be careful, it's easy to hurt yourself.

Edit to add: Just to be clear, and I know I may not need to say it but just to say I did, as with any other enclosure, that Q set up with a tub runs for a week or so before anything goes in it. Still needs a thermostat and thermometer and hydrometer, same process as setting up a new PVC or glass enclosure.