Wall-mounted air conditioner cost varies by unit capacity, installation complexity, and region; buyers typically pay between $900 and $4,500 for a single-zone system including installation. Main cost drivers are unit BTU, required refrigerant line length, wall modifications, and labor rates. Assumptions: 9,000–12,000 BTU, 8–12 ft wall, 1–5 ft refrigerant run. This article shows typical total price ranges, per-unit rates, and the main drivers that change a final quote for a wall-mounted mini-split or through-the-wall.
