I think you need to multiply the wattage by 3.41 to get the BUT/H, so you have 4*1250w S9 (default settings with Asicboost enabled) so that is 5000w +3300w for the M21s = 8300w*3.41 = 28,000 BTU/H, not sure what that will transfer to power consumption by the AC unit itself, but I think it will be around 3Kw depending on how efficient the compressor is, again please do more research.