Calculating Heat Load:
Heat is measured in either BTU or Kilowatts. 1KW is equivalent to 3500BTUs.
The heat load depends on a number of factor's
1.The floor area of the room
2.The heat generated by equipment
3 the heat from lighting
4.The number of room occupants
5.The ambient temp (your...
isopropyl is usually purer than ethanol leaving it an easier solvent to work with..its also significantly cheaper... easier to source
ethanol can provide a higher quality extraction but is difficult to work with to get a quality extraction
if you think spraying milk on your plants during flower is going to improve the situation... perhaps you should look into what i suggested.
that is if you still want a useable untainted product at the end of it all...