Evening! I've seen a few threads on FWH calculations, but none seem to match what I'm seeing here.
I've got a recipe that has two hop additions for 17.8 IBUs:
1.00 oz Fuggles [4.00 %] (60 min) Hops 12.9 IBU
1.00 oz Goldings, East Kent [5.00 %] (8 min) Hops 4.9 IBU
Now I'd like to change the Goldings to a FWH addition. So I change the 'Hop Use' to 'First Wort' and the boil time to 60 minutes. The IBUs jump to 30.7!
Then I read something about FWH's IBU impact being 10% more than a 20 minute boil. Ok, a 20 minute boil on the Goldings brings my IBUs to 22.7. 10% more than that is still only 24.5 IBUs.
So how is Beersmith calculating 30.7? I checked in my options, and my FWH adjustment is 10%.
Thanks,
-Joe
I've got a recipe that has two hop additions for 17.8 IBUs:
1.00 oz Fuggles [4.00 %] (60 min) Hops 12.9 IBU
1.00 oz Goldings, East Kent [5.00 %] (8 min) Hops 4.9 IBU
Now I'd like to change the Goldings to a FWH addition. So I change the 'Hop Use' to 'First Wort' and the boil time to 60 minutes. The IBUs jump to 30.7!
Then I read something about FWH's IBU impact being 10% more than a 20 minute boil. Ok, a 20 minute boil on the Goldings brings my IBUs to 22.7. 10% more than that is still only 24.5 IBUs.
So how is Beersmith calculating 30.7? I checked in my options, and my FWH adjustment is 10%.
Thanks,
-Joe