Posted a v3 of the yurt-cooler design as its own topic in Keeping Cool - swapped the bilge blower for an EC inline duct fan and measured both fans on the same cooler: airflow versus noise at every setting, saturation efficiency across the speed range, and battery runtimes. Short version: 80-105% mor...

Long-form build guide plus a emperical odessey for a tent version of the classic yurt cooler (v1: yurtcooler.com; v2 builds by Oskar Arvidsson and Joanna Ma; v3: this guide). Core change: the 12V bilge blower and hand-wired PWM become a single EC inline duct fan (AC Infinity CLOUDLINE H4) on a power...