When traditional window air conditioners aren’t an option due to building restrictions, window design limitations, or aesthetic preferences, several excellent alternatives exist. Non-window air conditioners offer versatile cooling solutions that can be equally effective and sometimes more energy-efficient. These units come in various types, sizes, and price points to accommodate different cooling needs without requiring window installation. This comprehensive guide explores the best non-window air conditioner options, their features, costs, and the key factors to consider before making your purchase.
Understanding the different types of non-window cooling systems is essential to finding the right solution for your space. Each type has unique advantages, installation requirements, and cooling capabilities.
- Portable air conditioners – Freestanding units that can be moved from room to room
- Ductless mini-split systems – Permanent installations with indoor and outdoor components
- Through-the-wall air conditioners – Permanent units installed directly through an exterior wall
- Central air conditioning – Whole-home systems that distribute cool air through ductwork
- Evaporative coolers – Alternative cooling devices that use water evaporation
Portable Air Conditioners: Versatile Cooling Solutions
Portable air conditioners offer the ultimate flexibility as they can be moved from room to room. These units require minimal installation – typically just a venting hose that needs to reach an exterior window, sliding door, or dedicated vent. They’re particularly suitable for renters or those who need temporary cooling solutions.
Top Portable Air Conditioner Models
The market offers numerous portable AC options with varying cooling capacities, features, and price points. Here are some of the best performers based on cooling efficiency, noise levels, and customer satisfaction:
| Model | BTU Rating | Room Size | Special Features | Average Price |
|---|---|---|---|---|
| Whynter ARC-14S | 14,000 BTU | Up to 500 sq ft | Dual hose, dehumidifier, carbon filter | $550-650 |
| Black+Decker BPACT14HWT | 14,000 BTU | Up to 350 sq ft | Heating function, remote control | $450-550 |
| SereneLife SLPAC10 | 10,000 BTU | Up to 300 sq ft | Built-in dehumidifier, automatic swing mode | $300-400 |
| Honeywell HL14CESWK | 14,000 BTU | Up to 550 sq ft | Thermal overload protection, thermal filter | $500-600 |
Pros and Cons of Portable Air Conditioners
Before investing in a portable air conditioner, consider these advantages and disadvantages:
Pros: No permanent installation required, mobility between rooms, no exterior alterations needed, often less expensive upfront than other non-window options, and multifunctionality (many include dehumidifying and fan modes).
Cons: Generally less efficient than other cooling options, takes up floor space, can be noisy, requires venting, and typically only effective for single rooms rather than whole-home cooling.
Ductless Mini-Split Systems: Efficient Permanent Solutions
Ductless mini-split systems represent a premium non-window cooling solution that offers high efficiency and minimal visual impact. These systems consist of an outdoor compressor/condenser unit connected to one or more indoor air-handling units through a small conduit.
Mini-splits allow for targeted zone cooling without the ductwork required for central air. They’re ideal for room additions, homes without existing ductwork, or areas where window units or through-wall installations aren’t feasible.
Leading Ductless Mini-Split Systems
| Brand/Model | BTU Rating | SEER Rating | Coverage Area | Price Range (including installation) |
|---|---|---|---|---|
| Mitsubishi MSZ-GL | 9,000-24,000 BTU | 20.5 SEER | 350-1,500 sq ft | $3,000-$5,000 |
| Daikin FTXS Series | 9,000-24,000 BTU | 23 SEER | 350-1,500 sq ft | $3,200-$5,500 |
| LG LS120HSV5 | 12,000 BTU | 21.5 SEER | 450-550 sq ft | $2,800-$4,000 |
| Pioneer WYS Series | 9,000-36,000 BTU | 19 SEER | 350-1,500 sq ft | $1,800-$3,500 |
Advantages and Disadvantages
Pros: Highly energy-efficient, quiet operation, flexible installation options, individual room temperature control (for multi-zone systems), sleek design, and long lifespans of approximately 15-20 years.
Cons: Higher upfront cost (including professional installation), permanent installation that requires exterior changes, more complex maintenance, and generally not suitable for DIY installation.
Through-the-Wall Air Conditioners: Permanent Window Alternatives
Through-the-wall air conditioners, also known as wall-mounted or wall-sleeve air conditioners, offer a permanent solution similar to window units but are installed directly through an exterior wall. They provide efficient cooling without taking up window space or floor space.
These units require creating a hole in the exterior wall but once installed, they provide a clean look and typically higher energy efficiency than portable units. They’re ideal for spaces where window units aren’t an option but a permanent installation is acceptable.
Top Through-the-Wall Air Conditioner Models
| Model | BTU Rating | Room Size | Energy Efficiency | Price Range |
|---|---|---|---|---|
| Frigidaire FFTA123WA1 | 12,000 BTU | Up to 550 sq ft | ENERGY STAR certified | $600-700 |
| LG LT1037HNR | 10,000 BTU | Up to 450 sq ft | 11.3 EER | $550-650 |
| Koldfront WTC12001W | 12,000 BTU | Up to 550 sq ft | 9.5 EER | $530-630 |
| Keystone KSTAT12-1C | 12,000 BTU | Up to 550 sq ft | 10.5 EER | $500-600 |
Pros and Cons of Through-the-Wall Units
Pros: No floor space required, more energy-efficient than portable units, permanent installation without sacrificing window space, substantial cooling capacity, and quieter indoor operation than window units.
Cons: Requires structural modifications to your home, professional installation recommended, cannot be moved easily once installed, and may affect resale value for rental properties or condos.
Central Air Conditioning Systems
For whole-home cooling solutions, central air conditioning systems provide the most comprehensive coverage. These systems distribute cooled air through a network of supply and return ducts, offering consistent temperature control throughout the entire home.
Central AC represents a significant investment but provides superior comfort and potentially better energy efficiency for cooling multiple rooms. These systems are typically integrated with your home’s heating system, using the same ductwork and thermostat controls.
Leading Central AC Systems
| Brand | Top Model | SEER Rating | Price Range (unit only) | Installation Cost |
|---|---|---|---|---|
| Carrier | Infinity 26 | 26 SEER | $3,500-5,500 | $4,000-7,000 |
| Lennox | SL28XCV | 28 SEER | $4,000-6,000 | $4,500-7,500 |
| Trane | XV20i | 22 SEER | $3,300-5,300 | $4,000-7,000 |
| Rheem | RA20 | 20.5 SEER | $2,500-4,500 | $3,500-6,500 |
Advantages and Limitations
Pros: Whole-home cooling, centralized control, hidden equipment (no visible indoor units), potentially best option for large spaces, improved indoor air quality with proper filtration, and increased property value.
Cons: Highest initial investment, requires professional installation, needs existing ductwork or significant renovation to install ducts, regular professional maintenance required, and not ideal for cooling individual rooms.
Evaporative Coolers: Alternative Cooling Option
Evaporative coolers (also known as swamp coolers) represent a cost-effective alternative for dry climates. Unlike traditional air conditioners that use refrigerants, these systems cool air by evaporating water, making them more environmentally friendly and energy-efficient in appropriate climates.
They work best in areas with low humidity levels (below 50%) and can use up to 75% less energy than conventional air conditioning systems. These aren’t technically air conditioners but provide comparable cooling in the right environment.
Notable Evaporative Cooler Models
| Model | Coverage Area | CFM Rating | Features | Price Range |
|---|---|---|---|---|
| Hessaire MC37M | Up to 950 sq ft | 3,100 CFM | Portable, 3 cooling speeds | $300-400 |
| Honeywell CO60PM | Up to 850 sq ft | 1,540 CFM | Indoor/outdoor, carbon dust filter | $450-550 |
| Champion Cooler MasterCool MCP44 | Up to 1,600 sq ft | 4,000 CFM | Window-mounted, energy-efficient | $600-700 |
| Portacool PAC2K36HPVS | Up to 1,100 sq ft | 3,600 CFM | Portable, variable speed | $1,800-2,200 |
Suitability Considerations
Pros: Low operating costs, environmentally friendly, improves air quality by bringing in fresh air, works well in dry climates, uses less electricity, and some models are portable.
Cons: Only effective in low-humidity regions, adds moisture to the air (potentially problematic in already humid climates), requires regular maintenance, not as powerful as traditional AC, and requires windows to be open for proper ventilation.
Factors to Consider When Choosing a Non-Window Air Conditioner
Selecting the right non-window air conditioner requires considering multiple factors beyond just cooling capacity. Here are the key considerations to guide your decision:
Cooling Capacity and Space Requirements
Matching the unit’s BTU rating to your space size is crucial for efficient cooling. As a general guideline:
- 150-350 sq ft: 5,000-8,000 BTU
- 350-550 sq ft: 8,000-12,000 BTU
- 550-1,050 sq ft: 12,000-18,000 BTU
- 1,050-1,600 sq ft: 18,000-25,000 BTU
Consider ceiling height, sun exposure, insulation quality, and local climate when calculating your needs. Oversized units can cycle too frequently and undersized units will run constantly without adequately cooling.
Installation Requirements
Different non-window AC types have varying installation needs:
- Portable units: Minimal installation; need access to drain water and vent hot air
- Ductless mini-splits: Professional installation required; need exterior wall access
- Through-the-wall units: Structural modification required; professional installation recommended
- Central air systems: Extensive professional installation; ductwork needed
- Evaporative coolers: Varies by model, but many need access to water supply and adequate ventilation
Energy Efficiency Considerations
Energy efficiency ratings help you understand long-term operating costs:
- SEER (Seasonal Energy Efficiency Ratio): Used for central and mini-split systems; higher is better (minimum 14 SEER for new installations)
- EER (Energy Efficiency Ratio): Used for room air conditioners; higher is better (10+ is good)
- ENERGY STAR certification: Indicates the unit meets efficiency guidelines set by the EPA
More efficient units typically cost more upfront but save money over time through reduced electricity consumption. Consider the climate where you live and how frequently you’ll use the system when evaluating potential energy savings.
Smart Features and Technologies
Modern non-window air conditioners often include advanced features that enhance convenience, efficiency, and performance. These technological improvements can significantly impact user experience.
Connectivity and Control Options
Many premium units now offer smart capabilities, including:
- Wi-Fi connectivity for remote control via smartphones
- Voice control compatibility with Amazon Alexa, Google Assistant, or Apple HomeKit
- Programmable timers and scheduling options
- Learning capabilities that adjust to your preferences over time
- Integration with smart home systems
These features allow for more precise temperature control, pre-cooling spaces before arriving home, and potential energy savings through more intelligent operation patterns.
Air Quality Enhancements
Beyond cooling, many non-window AC systems offer air quality improvements:
- HEPA and activated carbon filtration systems
- UV light sanitization to reduce germs and bacteria
- Dehumidification modes to reduce moisture levels
- Air purification technology
- Self-cleaning functions to prevent mold growth
These features are particularly valuable for allergy sufferers and those concerned about indoor air quality, especially in urban environments or areas with high pollution levels.
Maintenance Requirements
All air conditioning systems require some maintenance to operate efficiently and extend their lifespan. Understanding these requirements helps ensure optimal performance and longevity.
Regular Maintenance Tasks
Depending on the type of non-window air conditioner, common maintenance includes:
- Filter cleaning/replacement: Monthly during heavy use for all AC types
- Condensate drain cleaning: Seasonally for portable units and mini-splits to prevent clogs
- Coil cleaning: Annually for all systems to maintain efficiency
- Coolant level checks: Every few years by professionals for permanent installations
- Vent cleaning: Seasonally for portable units to ensure proper airflow
- Water panel replacement: Regularly for evaporative coolers (frequency varies by usage)
Professional maintenance service is recommended annually for most permanent installations, while portable units can often be maintained by owners with basic mechanical skills.