I honestly wouldn't know how to work in this summer without that portable AC of mine... Yes, it costs power. But I only run it when I'm working, only in the office, only to a 25°C target, and it's the most climate friendly option I could find back in 2019 too (R290).
Really happy about an efficiency improvement today! Took the Flir One & scanned my setup for heat creep. Turns out the outlet is fairly well isolated, but the hose turned out to be leaking some air & also radiating heat. Duct tape + blanket ftw! Achieving 10+°C difference now!
And thanks to everyone who pushed me in the direction of a dual hose conversion again. I'm still not convinced I can make that work in my room & window layout, but considering the heat & energy prices these days I'm going to give it my hardest try. Wish me luck.