Do you need oil to turn on the air conditioner in summer and oil to blow warm air in winter?

Warm air costs no oil. It's another small water tank under the workbench. The water pipe is connected with the engine. A small fan blows through the water tank. When the water in the water tank is hot, the wind will naturally heat up. When the warm air works, there are only dozens of watts of fans, so there is no sharp point with fuel consumption. Don't worry, enjoy it. I am a senior technician in the pit.