If you need powerful cooling with reliable supplemental heat for large spaces, these 5 units offer strong performance, energy efficiency, and smart controls. The best fits include owners of large living rooms, open-concept spaces, or apartments with high heat load, and buyers who want a single unit handling both cooling and heating. Below, you’ll find a quick product snapshot and a detailed look at who each model is best for, along with practical notes on usage and limitations.
| Product | BTU (Cooling) | Heat Capacity | Best For |
|---|---|---|---|
| Keystone 23,200 BTU Window AC with 16,000 BTU Supplemental Heat | 23,200 | 16,000 | Large rooms up to 1,500 sq ft |
| COSTWAY 24,000 BTU Mini Split | 22,000 | 23,000 | Open floor plans up to 1,500 sq ft |
| Albott Mini Split 24,000 BTU SEER2 18 | 24,000 | NA | Year-round comfort in big spaces |
| Whirlpool 14,000 BTU Through-the-Wall With Supplemental Heat | 14,000 | Not primary heat | Medium rooms up to 700 sq ft |
| Midea 12,000 BTU Window AC With Heat | 12,000 | Not primary heat | Medium to large rooms up to 550 sq ft |
Keystone 23,200 BTU Window AC With 16,000 BTU Supplemental Heat
Cooling capacity: 23,200 BTU; supplemental heating: 16,000 BTU. This all-in-one unit provides cooling, dehumidification, and fan circulation for large spaces up to 1,500 sq ft. The supplemental heat mode is designed for use when outdoor temperatures are between 23 and 76 degrees and should not substitute a primary heat source. The Smart Remote reads room temperature and updates the wall unit every 3 minutes for accurate climate control.
Best for: Large rooms needing strong cooling with occasional supplemental heat, such as living rooms or open-plan areas. This model is ideal for buyers who want a single unit handling both functions and value a smart remote experience.
Limitations: Supplemental heat is not a primary heat source. In very cold conditions, you’ll still rely on a dedicated heating system.
Midea Inverter Window AC With Heat, 12,000 BTU
Multi-season comfort combines cooling and reliable supplemental heat, suitable for large rooms up to 550 sq ft. Inverter technology supports energy efficiency with a CEER-friendly rating and Energy Star certification. Features include a digital LED display, 5 modes, 3 fan speeds, a 24-hr timer, and app/voice control via Midea SmartHome, Alexa, and Google Assistant.
Best for: Apartments or small-to-mid-size rooms where energy savings matter and smart control is a priority. Not ideal as a primary heat source in very cold weather.
Limitation: Heat pump function will not operate when outside temperatures fall below 41°F.
Albott 24,000 BTU Mini Split, SEER2 18
All-in-one comfort with cooling, heating, dehumidifying, and fan modes. The unit uses an inverter heat pump with SEER2 18, delivering strong airflow with energy savings for spaces up to 1,550 sq ft. Works year-round and is designed for reliable operation in extreme temperatures (roughly 5°F to 122°F).
Best for: Large homes or open-plan spaces where a powerful, energy-efficient multi-zone system is desired, offering substantial cooling and heating in one package.
Limitation: Requires installation and proper outdoor unit placement; not as portable as window units.
Whirlpool 14,000 BTU Through-the-Wall With Supplemental Heat
Through-the-wall design provides strong cooling up to 700 sq ft, with 10600/8600 BTU supplemental heat. The unit offers 8-way louvers, 3 fan speeds, and multiple operation modes for flexible customization. Fit is intended for standard sleeves and requires 230V/20A circuits.
Best for: Medium rooms in apartments or homes needing robust cooling with supplemental heat, where a wall sleeve installation is already planned.
Limitation: Supplemental heat is not meant to be a primary heat source in very cold conditions; setup requires wall sleeve compatibility.
Midea 8,000 BTU Smart Inverter Window AC With Heat
Compact window unit with heat suitable for smaller spaces up to 350 sq ft. Features include an LED display, 5 modes, remote and app/voice control, and Energy Star efficiency. Inverter technology helps reduce energy use while maintaining comfort.
Best for: Small to midsize rooms where budget and space are limited but heat assistance is still desired. Not ideal for very large rooms.
Limitation: Lower cooling/heating capacity compared to larger minisplits; best used where space constraints dictate placement.
Buying Guide: Choosing the Right 22000 BTU With Heat Model
- Room size and layout: For spaces up to 1,500 sq ft, consider high-BTU units or multi-zone mini splits. For rooms under 700 sq ft, 12,000–14,000 BTU models can suffice if heat needs are modest.
- Primary vs. supplemental heat: Window and through-the-wall units typically use supplemental heat. For reliable winter warmth, look for a unit labeled as supplement heat with clear temperature ranges.
- Energy efficiency: Inverter/variable-speed technology reduces energy use. Compare SEER and EER ratings where available.
- Installation: Mini splits require professional installation and outdoor unit placement. Window and wall units are generally easier to install but still require a suitable sleeve or window opening.
- Smart features: Remote controls, smartphone control, and voice assistant compatibility add convenience and can improve daily energy management.
FAQ
What does “supplemental heat” mean in these units?
Supplemental heat provides additional warmth when outdoor temperatures are moderate but is not meant to replace a dedicated heating system in very cold conditions.
Can a 22000 BTU unit heat a large open-concept space?
Yes, especially if paired with proper ducting or a multi-zone mini split. For very large open layouts, consider higher-capacity or multi-unit setups.
Are inverter mini splits more energy-efficient than standard units?
Yes. Inverter technology adjusts compressor speed to the cooling/heating load, typically reducing energy consumption over traditional fixed-speed units.
Is installation requiring professional help?
Window and through-the-wall units are often installable by homeowners with basic tools, while mini splits usually require professional installation for optimal performance and warranty compliance.
What should I avoid when using supplemental heat?
Avoid using supplemental heat as the primary heating source in very cold conditions. Check outdoor temperature guidelines in the product manual.
