Not much use in the UK.
Agree, not a good idea. It could end up costing you a new roof.
https://www.ebay.co.uk/p/Gree-8000-BTU-Portable-Air-Conditioner-W-remote-certified/25017742292?iid=232815241703&_trkparms=aid=888007&algo=DISC.MBE&ao=1&asc=49130&meid=0def34bbd95d43f3931617b504574616&pid=100009&rk=1&rkt=2&sd=123183441117&itm=232815241703&_trksid=p2047675.c100009.m1982 Better deal?
5000 BTU ... well enough to keep a downstairs cloakroom cold then ...
I took it back after 2 hours. too loud for me