Toe Ductor, Pre-Assembled Under Cabinet Toe Kick Ducting Kit - Floor Vent Kit Already Assembled Toe Kick Ducting Floor Vent Kit Fits perfectly under a standard 4 inch cavity below a cabinet (Please measure the cavity before purchase to make sure it is 4") Easy installation, pre-assembled kit, no custom boot required You wont' be heating up the cabinet itself - the Toe Ductor will save you money by making your heating/cooling system more efficient It will increase performance of heating system by directing airflow out so the heat gets to where you are paying for it to go