Did the dual hose thing
After seeing everyone do dual hose modifications to their portable aircons, I've jumped on the bandwagon with my own take. Why not, it's a bit of fun and if everything goes well the AC will work better afterwards.
Didn't really want to make one out of cardboard, and I don't have the brains to make something and get it 3D printed, so I repurposed some bits you can get on Amazon/Aliexpress.
Wanted it to be as easy as possible to make, require minimal tools and skill, be fully and cleanly reversible (no tape), and effective.
And it does work, it's pretty air tight aside from the small bit exposed above the box (see third picture). I got pretty lucky that I was able to find such a conveniently sized box.
The real test would be how effective the aircon will be when it heats up again on Wednesday.
Supplies:
Bought an aircon hose, hose attachment (for a Comfee unit apparently, it was just the cheapest one I could find), pipe insulation, and an outside inlet/outlet piece for £24.71 in total from Aliexpress. Note I used coins (basically AliEx points), so it would be £10 more w/o points.
Found a plastic box roughly the size of the condenser inlet for £11.99 on Amazon, and an automotive pollen filter that fits the box (BMW part # 64312284828 which is 188x187x25mm) for £9.99 a pair on eBay.
Box will be attached to aircon using velcro straps which was £4.60 a roll.
Sundries and tools include a hot glue gun w/ glue, zip rivets, cheap flat window/door seals (which feels like it's made of PU), a drill and a drill bit, and some way to cut the plastic as well as clean up the cuts/holes you make (I used an angle grinder and a dremel).
Methodology:
Drilled holes on the edges on the hose attachment bracket and bottom of plastic box, then cut a hole the size of the hole of the attachment into the bottom of the box, apply seals to bottom of the attachment piece, then secure hose attachment bracket to box using zip rivets and hot glue (ensuring air tight seal).
Apply seals to top of box. Optionally make a seating area for the pollen filter at a suitable location inside the box. You can make this out of anything, really. I used leftover seals, but you could fashion something out of cardboard or use hot glue to make a lip. I did this as I didn't want insects and other large debris getting eaten by my aircon, and a pollen filter of this type shouldn't be too restrictive.
I didn't cut the tails of the zip rivets in case the aircon was choking for air. I can easily add a 140mm fan or something to the box if need be using the rivets as an attachment point. I definitely not cut them because I couldn't be arsed.
The Comfee hose attachment thing ended up being slightly too big for the 5.9 inch hose, so I used more window seals and a bit of hot glue to make the hose fit correctly (I didn't glue to the hose to the piece, just effectively made the receptacle smaller so the hose fit with friction).
Assemble hose (sleeve + outdoor inlet), then strap box assembly to aircon's arse. Then attach hose to box and feed inlet hose outside. Done.