The BBG Guru F4 - Manual (Page 20)

Cooking Configurations
16
Warming and Holding
Your Caldera Del Fuego Tallboy is an ideal
warming and holding oven for outdoor events.
Simply close the firebox tuning plate lids and set
the BBQ Guru to a warming temperature in the
140°-165° F range.
Use either steam table pans or disposable
aluminum pans on a rack. Seal pans with
aluminum foil to retain moisture.