Side oxygen supply type gas water heater and side oxygen supply type housing

The utility model discloses a side oxygen supply type gas water heater, which comprises a heating device and a side oxygen supply type housing, wherein the heating device comprises a combustion chamber and a gas pipeline connected with the combustion chamber; the side oxygen supply type housing is covered outside the combustion chamber, and comprises a top, a bottom for isolating outside air from entering and a ring side part connected with the top and the bottom; a plurality of air inlet holes are formed in the ring side part, and the air inlet holes are formed between the location of the combustion chamber, which orthographically projects on the ring side part, and the top; the air inlet holes are used for supplying outside air to the side oxygen supply type housing and flowing towards the combustion chamber so as to form a side oxygen supply flow; and gases required by combustion of the combustion chamber comprises a side oxygen supply flow, air stored in the side oxygen supply type housing and gas supplie