nonac

NonAC is a shorthand for non-air-conditioned, used to label products, services, or facilities that do not include air conditioning. The term is most common in consumer transport and travel contexts, where operators offer both air-conditioned and non-air-conditioned options for price-sensitive customers. In signage and ticketing, "Non-AC" or "Non AC" clearly indicates the absence of an air-conditioning system.

In public transport, non-AC variants typically rely on passive ventilation, windows, or ceiling fans. The experience is generally cooler in moderate climates but can be uncomfortable in hot or humid conditions. Non-AC options are usually cheaper than their air-conditioned counterparts and may have fewer amenities such as fixed seating, limited luggage space, or reduced privacy.

Regional usage is most prominent in parts of Asia and developing markets, where non-AC coaches, buses, and taxis are common in lower fare tiers. The label may appear on timetables, signage, or online booking portals. In some contexts, "Non-AC" is used alongside other classifications to help passengers choose between comfort, cost, and speed.

The term itself is informal rather than a formal technical standard; it is not tied to a single regulatory body. Its meaning is generally understood within the local market but can vary by operator in terms of exact configuration and amenities. See also AC (air conditioning).