Annieareyouok, I wish I could say for sure but I didn't get to that stage with mine, I just used it to decarb 10g of bud, which I then used for edibles, according to the blurb it takes 250ml, looking at it that's prob about right. I dont think I fancy using liquid in mine thodoes there seem to be a minimum amount for the liquid level?
My HerbOven doesn't come up to temp anymore. I tried to decarb 3 grams of concentrate for 1 hour at 300 degrees. At 50 minutes, my heat gun registered 190 degrees inside the HerbOven. I finished decarbing on a 300 degree hot plate.
Great point about vessel to vessel loss. If a gram of concentrate contains 750-850 mg/thc I estimate my final product to hold around 600mg but this is based on absolutely nothing.
Has anyone come across a more scientific method?