Wall Mount (9k–36k BTU)

(9,000 – 36,000 BTU) Wall-Mount Mini Split Systems

The Wall-Mount Mini Split Systems (9,000 – 36,000 BTU) category covers the most common single-zone ductless sizes for bedrooms, offices, bonus rooms, living areas, studios, finished basements, and small commercial spaces. These 1-to-1 systems pair a compact outdoor unit with a quiet, wall-mounted indoor head to provide targeted heating and cooling exactly where you need it, without extending ductwork or cutting into existing systems.

Wall-mount ductless units are the go-to choice for many technicians because they install quickly, are easy to service, and deliver high SEER2 / HSPF2 efficiency with inverter-driven compressors. Instead of short-cycling like traditional on/off equipment, these systems modulate capacity to maintain steady temperatures, better humidity control, and low sound levels. The 9,000–36,000 BTU range covers everything from a single bedroom to larger open rooms and small retail bays, with options for both cooling-only and heat pump configurations depending on climate and load.

• 9,000–12,000 BTU wall-mount systems sized for bedrooms, offices, and small enclosed spaces with light to moderate loads.
• 18,000–24,000 BTU systems for larger living rooms, bonus rooms, and open-plan areas where central HVAC struggles to keep up.
• 30,000–36,000 BTU wall-mount units targeting big rooms, lofts, and small commercial or retail spaces with higher heat gain.
• Heat pump options that provide year-round comfort, plus cooling-only models for mild climates or server/IT rooms.
• OEM-compatible accessories such as line sets, line hide, wall brackets, condensate solutions, surge protection, and smart controls.

When selecting a wall-mount mini split in the 9K–36K BTU range, start with room-by-room load, ceiling height, insulation, window area, and sun exposure. Avoid guessing strictly from square footage charts. Use the Compare tools on this page to review capacity range, SEER2 / HSPF2 ratings, sound levels, operating temperature limits, and line-set length allowances so you can match each system to real-world conditions instead of just nameplate tonnage.

Pro tip: Sketch the room and mark your preferred indoor unit location, outdoor unit pad or bracket location, and a clean path for line sets, power, and condensate drainage. Note panel type and available breakers. Share those details and your target design temperature and we can help you confirm the ideal wall-mount mini split size, model family, and OEM accessories for a quiet, efficient, and code-compliant installation.