What equipment allows air to pass over cold evaporator coils and directly into a room without re-heating?

The equipment that allows air to pass over cold evaporator coils and directly into a room without re-heating is an air conditioner. An air conditioner works by utilizing a refrigeration cycle, where a refrigerant absorbs heat from the indoor air. As the warm air is drawn from the room and passed over the cold evaporator coils, the heat is extracted, and the cooled air is circulated back into the room. This process effectively lowers the room temperature without the need for re-heating the air, making it efficient for creating a cooler indoor environment.

In contrast, while other equipment like humidifiers and dehumidifiers may manage moisture levels in the air, they do not cool the air in the same manner as an air conditioner. A humidifier adds moisture to the air, and a dehumidifier removes moisture, but neither affects the temperature through the cooling process associated with evaporator coils. An evaporative cooler, on the other hand, uses the process of evaporating water to cool the air rather than relying on the refrigeration cycle, making it a distinct method that involves adding moisture back into the air rather than simply cooling it without reheating.