If you’re looking to maintain a comfortable temperature in your garage throughout the year, a mini split garage heater is an excellent choice. These ductless HVAC systems provide both heating and cooling, energy efficiency, and flexible installation. Below is a summary of the top models available on Amazon, suiting various space sizes and power preferences.
| Product | BTU Capacity | Energy Efficiency (SEER2) | Heating & Cooling | Smart Features |
|---|---|---|---|---|
| COSTWAY 12000BTU Mini Split AC & Heater | 12000 BTU | 20 SEER2 | Yes, Heat Pump | Remote control, Timer, Sleep Mode |
| ROVSUN 9000 BTU WiFi Mini Split | 9000 BTU | 19 SEER2 | Yes, Heat Pump | WiFi enabled, Quiet operation |
| ROVSUN 11500 BTU WiFi Mini Split | 11500 BTU | 17 SEER2 | Yes, Heat Pump | WiFi, Voice control, Sleep Mode |
| Hykolity 18000 BTU Mini Split AC & Heater | 18000 BTU | 19 SEER2 | Yes, Heat Pump | WiFi, Auto defrost, Installation kit |
| DELLA Vario Series 12000 BTU Mini Split | 12000 BTU | 19 SEER2 | Yes, Heat Pump | Alexa compatible, Auto defrost, Timer |
COSTWAY 12000BTU Mini Split Heater & Air Conditioner
The COSTWAY 12000BTU Mini Split is an energy-efficient dual-purpose system designed to cool rooms up to 750 sq. ft. Its built-in 1-ton heat pump delivers both heating and cooling with inverter technology that adjusts the compressor frequency to save energy and prolong equipment life. The system offers five modes—auto, cool, dry, heat, and fan—with four fan speed levels including an ECO mode. The remote control includes a digital screen that auto-turns off to maintain quietness during sleep. This unit combines convenience, quiet operation, and energy efficiency, making it suitable for garages and other medium-sized spaces.
ROVSUN 9000 BTU WiFi Enabled Mini Split
This ROVSUN 9000 BTU mini split is ideal for smaller garages or rooms up to 400 sq. ft. It features inverter technology with a high 19 SEER2 rating, optimizing energy use by adjusting compressor speed based on indoor temperature. The system runs ultra-quiet at just 28 dB in mute mode and offers a wide temperature range (61°F-88°F) for year-round comfort. Included heat pump functionality enhances the heating capacity, with a dehumidification mode to reduce moisture. The WiFi enabled controls allow for smart operation remotely via an app, increasing convenience.
ROVSUN 11500 BTU WiFi Mini Split Air Conditioner & Heater
Designed for slightly larger spaces, the ROVSUN 11500 BTU mini split integrates cooling, heating, dehumidifying, and fan functions for a complete all-season solution. Its 17 SEER2 energy rating makes it efficient, offering 25% energy savings compared to standard units. Additional features include auto defrost for low ambient operation, a 24-hour timer, and multiple operation modes including sleep and ECO modes. Smart home enthusiasts will appreciate the WiFi and voice control compatibility with Alexa and Google Assistant, allowing remote temperature adjustment and scheduling to increase comfort and efficiency.
Hykolity 18000 BTU Mini Split AC & Heater with Installation Kit
The Hykolity 18000 BTU mini split is a powerful choice for garages up to 1250 sq. ft., featuring a larger heat pump and compressor for rapid temperature control. It combines a high 19 SEER2 and 8.5 HSPF2 rating, promoting up to 30% energy savings. Reliability is ensured by ETL and AHRI certifications. This model comes with a comprehensive accessory installation kit, including line sets and vibration absorber feet, simplifying setup. Automatic defrost capability improves efficiency during colder months, making it a versatile system for large garages or workshop spaces.
DELLA Vario Series 12000 BTU Mini Split Air Conditioner with Alexa
The DELLA Vario Series 12000 BTU mini split is a smart and energy-efficient option designed for spaces up to 550 sq. ft. It boasts a 19 SEER2 rating with AHRI certification and a heat pump capable of operating in low temperatures as low as -4℉. Smart features include auto defrost, self-diagnosis/cleaning, multiple fan speeds, sleep and eco modes, and intelligent compressor pre-heating to optimize energy use. The system’s Alexa compatibility adds voice control convenience, with remote sensing on the handheld remote providing targeted comfort and savings.
Buying Guide for Mini Split Garage Heaters
BTU Capacity and Coverage Area
Choosing the right BTU rating is critical. A unit’s BTU indicates its heating and cooling power. For garages under 500 sq. ft., units between 9000-12000 BTU generally suffice. Larger garages (above 1000 sq. ft.) require units with 15000 BTU or higher to maintain effective temperature control.
Energy Efficiency Ratings
SEER2 (Seasonal Energy Efficiency Ratio) measures cooling efficiency, while HSPF (Heating Seasonal Performance Factor) gauges heating efficiency. Higher SEER2 and HSPF ratings reduce electricity consumption and operating costs. Aim for units certified by AHRI to ensure genuine efficiency ratings.
Heating Technology: Heat Pumps vs. Electric Resistance
Mini splits typically feature heat pumps that provide both heating and cooling by transferring heat rather than generating it, making them more energy-efficient than electric resistance heaters. Heat pumps also perform well in moderate winter climates; ensure your unit supports low-ambient heating if you live in colder areas.
Installation Considerations
Most mini splits require professional installation due to refrigerant handling and electrical work. Some systems come with complete installation kits including line sets and mounting hardware, simplifying the process. Proper sizing of copper lines and ensuring electrical compatibility (115V vs 230V) is essential.
Smart Features and Controls
Modern mini splits offer smart connectivity through WiFi and app integration, allowing remote control, scheduling, and voice commands via Alexa or Google Assistant. Features like timers, sleep modes, eco modes, and intelligent temperature sensing enhance comfort and energy savings.
Noise Levels
Look for units with low decibel ratings (under 30 dB) in quiet or mute modes, especially important if your garage doubles as a workspace or hobby room.
Additional Functionalities
Auto defrost capability prevents frost build-up in heating mode. Multi-mode operation (cooling, heating, dry/dehumidify, fan) expands comfort options. Multiple fan speeds and adjustable airflow directions enhance usability according to preferences and seasonal needs.