Toe Ductor, Under Cabinet Toe Kick Ducting Kit Under Cabinet Toe Kick Ducting Kit (Floor Vent Kit - Unassembled) Fits perfectly under standard 4 inch cavity below a cabinet (Please measure the cavity before purchase to make sure it is 4") Easy installation, no special tools needed, no custom boot required You won't 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