Just realized your name is Mark Farrall. Mine is Mike Farrell. Pretty close.

Thanks for the input guys. I am trying to get to a particular number of IBU's and I know from Flameout additions that they add a ton of bitterness and this is first time doing an neipa where I'm whirlpooling at 180 which is much lower than a flameout addition so just trying to get a starting...

Using a 12.5 aa hop with a 20 minute boil, this software shows 28.51 IBU which seems correct. When I change "boil" to "whirlpool" the utilization goes to 10% which seems ok. I then put 180 degrees for 20 minutes in and it shows the IBU to be 17.2. This seems excessive. If I change the...