I know this is an old post. (AS CHOOKCHOOK2 WAS THE LAST TO RESPOND) But, I like the Koala. And its australia day, so why not put something ozzi up!?

Every time a scroll past this fan posting, I just think yuk, it really is awful and I don't often say that, usually I think isn't great everyone has different tastes ..but that abomination goes nowhere

For a "couple of days a year" get a pedestal fan straight on everyone and leave the features in the ceiling. Seriously...I have 12 ceiling fans in my house and two wall mounted fans...the wall mounted fans are so much more effective then ceiling (and I don't know where you live, but did you know fans have a "summer" and "winter" setting??). Most people don't. Tip: turn the fan off before changing the setting.

Mercator make a slimline 3 in 1 that's flush to the ceiling. This is the one we've got but I don't know it's capacity - https://www.mercator.com.au/product/domini-3-in-1-bathroom-exhaust-fan-2/. They make another model that's above your extraction requirements - https://www.mercator.com.au/products/heater-exhaust-fans/bathroom-heaters-heater-exhaust-fans/. The photo is the one we've got (not in situ!). If you go to their product list, they do have just extractors. Can't help with individual heating lamps that don't stick out.