Final answer:
The most common types of motors used in single or two speed forced air furnace fans are split-phase motors. These motors rotate a shaft with fan blades, driven by air, water, or steam.
Step-by-step explanation:
The most conventional single or two speed forced air furnace fans use split-phase motors. These motors consist of a rotating shaft with fan blades that can be driven by various mediums such as air, water, or steam. The movement of these mediums across the blades creates a force that causes the fan to rotate, facilitating the movement of air for heating purposes.
The specific numbers provided (89, 99, 164, 175, 185, 190, 250, 279, 280, 282, 295, 430) do not directly relate to the type of motor used in furnace fans but may refer to other unrelated specifications or contexts.