Proofers with or without boiler requires a water supply for humidity. Handles 8 full size sheet pans (not included). Heat settings from 90°-122°F (32°-50°C). Compatible with Full size ovens: XAFT-04FS-ELDV & ETLV & ETRV. These proofers are not stand-alone items. They can be run and controlled only when stacked in modular configuration with the Bakerlux digital convection oven (Led or Touch control panels).