I recently changed my mash process as follows
- Mash at.1.3 qt per lb at whatever mash temp for 60 minutes
- Add boiling water to raise temp to 168. Stir good and rest for 10 minutes
- Drain to Kettle as fast as possible
- Add remaining water at 168. Stir well and rest for ten minutes.
- Drain to Kettle as fast as possible
Since making this change my typical Kettle and brew house efficiency have jumped ten points to 91% and 77% respectively.
My brewhouse is low because I leave a gallon of trub/wort in the kettle.