Found it: https://www.cryptocloaks.com/cryptocloaks-s9-asic-space-heater-testing-data/
Discussion
Something is off. How can the air coming out be hotter, but the BTU/hr be lower, for the second one?
Not sure, but nostr:nprofile1qqs03eyq7ja4xlavcx7m6qs0dhh6zdht650s27u4ldq9p039yncucycpzemhxue69uhhyetvv9ujuurjd9kkzmpwdejhgqgjwaehxw309ac82unsd3jhqct89ejhxqg5waehxw309aex2mrp0yhxgctdw4eju6t0wt55th might be able to shed some light on their testing.
They have their math wrong. It's 3.14 BTU per watt. They divided instead of multiplied
Here are the correct #s:
Look at the fan speeds. Higher temp but a lower volume of air moved.