What’s the difference between the Karcher A+ Surface Cleaner SC21 and SC24?

The main difference is the cleaning path size—the SC21 has a 21-inch cleaning path, while the SC24 covers 24 inches. Both are built with durable stainless-steel construction, dual spinning nozzles, and can handle hot or cold water up to 212°F. The SC21 is slightly more compact and easier to maneuver in tighter areas, while the SC24 is better for cleaning larger surfaces more quickly.