The present invention relates to a household refrigerator of the built-in type, comprising a refrigerator compartment and a basement (4) below containing a condenser (5), a fan (6) and a compressor (8), said basement (4) being equipped with a front wall provided with intake and exhaust openings for the cooling air of said components of the refrigerating unit.

The main characteristic of the present invention is that a central front portion (3) of the bottom in the refrigerated compartment extends downwards inside the basement (4) defining in it a peripheral U-shaped channel on whose rear length said components of the refrigerating units are located, aligned parallel to the basement front wall, whereas the two arms of the U-shaped channel come up to said front wall forming said intake and exhaust openings on both side ends.