Which car wash should I buy: tunnel, in-bay automatic or self-serve?

The three main formats look alike from the street, but they run very differently. A tunnel pulls a vehicle along a conveyor. An in-bay automatic moves equipment around a parked vehicle. A self-serve bay hands the wand to the customer. Each changes how many people you need, what breaks, and what kind of buyer will be comfortable running it.

Throughput and labour

A tunnel can serve many vehicles in a short time, but usually needs several people on site and careful scheduling. An in-bay automatic serves one vehicle at a time, so it depends on a good location and a short wait. Self-serve bays need the least staff, though cleaning and checking the bays still takes regular attention.

Memberships and equipment

Memberships fit tunnels and automatics best, because customers come often and the wash is quick. Ask how memberships are counted and what the buyer inherits. Equipment risk also differs. A tunnel has many moving parts and costly replacements, while self-serve equipment is simpler but spread across several bays. Ask for service records and the age of every major piece.

Water, owner time and fit

• Water and sewer: ask about reclaim systems and past utility bills.
• Owner time: tunnels usually ask the most, self-serve the least.
• Site: a tunnel needs room to queue; a self-serve bay can suit a smaller lot.
• Experience: staff management helps with a tunnel, mechanical skill with every format.

If you are drawn to the simplest format, start with the checks for a self-serve car wash, then compare it with the checks for car wash equipment for the others.