You can run it at 750W and sit next to it. Use a Temp Switch to remotely control it based on ambient temps.

https://miningwholesale.eu/s9-heater-guide-build-your-s9-space-heater/

https://image.nostr.build/a5f8efab394ea955c123bc26780dbdee854b918d23534a894db5b9ca4cb87ebd.jpg
https://image.nostr.build/fb722b3e047ab0b8fd95c0ec7b6fbcb0820560703f0610311f1a704bb29339f8.jpg
https://image.nostr.build/cd0b4d401d388b5a3dc852a15b1df2c4bd9282701eec1dfac2c16543c5454162.jpg
https://image.nostr.build/06aceaa547cd7267ba02569afab59f86322f6b4df4fd94c946412fc77045a98b.jpg