The answer to 'dehumidifier vs' is that dehumidifiers and air conditioners serve different but complementary purposes in controlling indoor humidity and temperature. Dehumidifiers are designed to remove excess moisture from the air, while air conditioners primarily cool the air and can also remove some humidity as a byproduct.
Dehumidifiers are best suited for homes in humid climates where the air feels damp or sticky, even when the temperature is comfortable. They work by drawing in moist air, removing the water, and then blowing the drier air back into the room. This can help prevent mold and mildew growth, and make the air feel more comfortable. Air conditioners, on the other hand, are better suited for cooling down hot, dry environments and can also provide some dehumidification as a side effect of the cooling process.