1.Media: direct convection heaters achieve the purpose of heating by directly heating the air; the oil heater first heats the internal heat transfer fluid, then heats the container, and then heats the surrounding air to increase the temperature.

2.Working principle: The convection heater uses the principle of natural convection. After the air is heated by the heating device, it flows out from the upper part of the heater. The new cold air in the room is supplemented from the bottom of the heater and flows in again and again, forming a thermal cycle in the room to achieve heating.

The oil heater is an electric heating tube that heats the enclosed heat transfer oil. The hot heat transfer oil rises to the upper part of the cavity, circulates convectively along the container , and radiates heat through the surface of the cavity, thereby heating the indoor space.

3. The heating efficiency is different: After the oil heater is turned on, the heating rate is relatively slow due to the radiant heating method and secondary inertial heating, while the convection heater is instant heating and heating quickly; but the oil heater is powering off After that, it still has the inertial heating function, but the convection type does not have this performance.