Looking for an efficient, ductless solution to heat or cool a single room or a small home addition? These five split-duct systems are designed for easy installation, strong energy performance, and flexible operation. They’re best for spaces where central HVAC isn’t practical, such as sunrooms, garages, or converted spaces. The selections below balance capacity, efficiency, and quiet operation to help you pick the right model for your needs.
Summary of chosen products:
- EXNOS 12000 BTU Mini Split AC/Heating System — Best for mid-sized rooms up to 750 sq.ft., quiet sleep mode.
- ROVSUN 17000 BTU Smart Inverter — Best for larger spaces up to 1000 sq.ft., high SEER2, wired control.
- Rellytech 18000 BTU Mini Split — Best for whole-home comfort up to 1250 sq.ft., ECO energy mode.
- Senville 24,000 BTU Ducted Mini Split — Best for concealed duct installations, versatile modes.
- GREE BOREAL BRISA 9100 BTU — Best for quick ductless setup with included air handler kit, high efficiency.
EXNOS 12,000 BTU Mini Split AC/Heating System
Capacity and efficiency: 12,000 BTU cooling and 12,500 BTU heating for spaces up to 750 sq. ft. Rated for 19 SEER2 and 8.5 HSPF2, it prioritizes energy savings with ECO mode. Best for medium rooms, home offices, or sunrooms seeking year-round comfort.
Best for: small-to-medium rooms where quiet operation matters and energy savings are a priority. The ECO mode helps curb electricity use without sacrificing comfort.
Caution: Sleep mode can still produce noticeable airflow at higher settings, so place away from direct airstreams in bedrooms.
ROVSUN 11,000 BTU Inverter Ducted Split
Capacity and efficiency: 11,000 BTU cooling/heating for spaces up to 550 sq.ft. Inverter with 19 SEER2, designed for energy savings. Ultracompact quiet operation at 39dB in mute mode and uniform air distribution.
Best for: smaller living areas or bedrooms where ultra-quiet performance is a priority and you want dependable year-round climate control.
Caution: 230V operation requires proper electrical setup; professional installation recommended.
Senville 24,000 BTU Ducted Mini Split
Capacity and features: 4-in-1 ducted mini split with heat pump, dehumidifier, fan, and turbo function. Rated for operation down to -22°F (-30°C). Includes built-in support and ETL Intertek approval with Energy Star and AHRI certifications.
Best for: homes needing concealed ducting with robust winter performance and supported by long-term installation and service options.
Caution: Higher upfront installation complexity due to concealed ducting; ensure space planning accounts for duct routes.
GREE BOREAL BRISA R32 1 Zone 9100 BTU
Capacity and efficiency: 9100 BTU single-zone system with 20.5 SEER2 and 8.8 HSPF2. No-duct solution with included air handler kit for quick setup, and professional installation support.
Best for: small rooms or converted spaces where a straightforward, high-efficiency solution is needed without extensive ducting.
Caution: 115-volt setup is convenient, but ensure compatibility with your room’s electrical panel to avoid overloads.
Buying Guide
What size do I need for my space?
Choose a unit rated for your room size. Larger spaces require higher BTU ratings to reach and maintain set temperatures efficiently. Consider ceiling height, window exposure, and sun load when selecting capacity.
How important is energy efficiency?
Higher SEER and HSPF ratings correspond to lower operating costs over time. Inverter-driven models adjust compressor speed to indoor conditions, providing savings in fluctuating climates.
What installation considerations matter?
Concealed duct systems require professional planning to route ducts effectively. Ductless mini splits offer simpler wall-installed indoor units and outdoor condensers, but electrical and refrigerant connections still need proper setup.
Which features should I prioritize?
- Quiet operation for bedrooms and nurseries.
- Energy-saving modes like ECO or auto-restart after power loss.
- Heating performance in cold weather for regions with winter temperatures.
What are potential limitations?
Some models have limited cooling at very low outdoor temperatures or require pre-charged installation kits. Concealed-duct systems may be more complex to install but offer a cleaner look.
How do I compare these models?
Compare by room size compatibility, SEER/HSPF values, outdoor noise, and whether the system is designed for ductless or concealed duct configurations. Look for compatibility with smart controls if you want app-based management.
FAQ
- What is a split duct system? A split-duct system uses an outdoor condenser connected to an indoor air-handling unit, with or without ducts, to condition space efficiently.
- Which unit is best for a medium-sized living room? The EXNOS 12,000 BTU or the Rellytech 18,000 BTU provides solid coverage for up to 750–1250 sq.ft., depending on insulation and layout.
- Do these systems require professional installation? Most ducted and concealed-duct systems should be installed by a licensed technician to ensure proper refrigerant charging and electrical safety.
- Can these systems operate in very cold climates? Several units list cold-weather heating capabilities; check the minimum outdoor temperature for efficient heating in your area.
- Are these units energy-star certified? Some models have Energy Star or AHRI certification, indicating compliance with energy efficiency standards.
- Can I upgrade to smart control? Many models support wired controllers or optional smart thermostats for remote management.