I am aiming to get 3 gallons of finished beer after primary fermentation in a 5 gallon carboy. I will lose around 0.35 gallons to grain absorption (BIAB) and 0.25 gallons to trub post-fermentation. So starting with 3.75 gallons RO water in my 5 gal kettle for BIAB mash, losing 0.35 gallons to grain, and getting 3.4 gal to perform whirlpool while chilling. Then will lose another 0.15 gal to hops, so getting 3.25 gallons into fermentor, with 3.0 gallons to keg or bottle after racking off trub.

No boil - raise to 180º F after mash complete and grain removed, and then add whirlpool hops there and begin chilling (I use ice bath, which takes about 30 minutes... wait 20-30 minutes for hop stand first if you use immersion or plate chiller, which is much faster). Dry hop toward tail end of active fermentation (which will be pretty quick using kveik!), or split total amount into two separate DH additions (one at yeast pitch for possible biotransformation, and one at or after tail end of active fermentation).