System for interfacing a floor vent to flooring

A system for interfacing a floor vent to flooring material, the flooring material for covering a floor and the floor vent for covering a hole through the floor, the system comprising:

• an underlayment for placement on the floor, the underlayment having a first compressibility;
• a floor vent for placement over the hole through the floor;
• a flooring material for placement on the underlayment, the flooring material having a second compressibility that is substantially less than the first compressibility;
• and
• an interface structure for placement on the floor, adjacent to the underlayment, beneath portions of the floor vent so as to support the floor vent in such a manner that there is no need for the flooring material to provide any contributing support to the floor vent, and beneath portions of the flooring material adjacent to the floor vent so as to support said portions of the flooring material adjacent to the floor vent, the interface structure having a third compressibility that is substantially less than the first compressibility.