- By: Sergey Fedorov
- Solar PV panels
- Updated: Dec 16, 2025
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0Mini Split Air Conditioners
Limited stock
MRCOOL Advantage Series 9k BTU Wall Mounted - Air Handler (R454B Refrigerant, 230V)
- TypeMini-Splits
- BTU Capacity9000BTU
- Tonnage0.75
Free delivery on Jan 08–13
Limited stock
MRCOOL Advantage Series 9k BTU Wall Mounted - Air Handler (R454B Refrigerant, 115V)
- TypeMini-Splits
- BTU Capacity9000BTU
- Tonnage0.75
Free delivery on Jan 08–13
Limited stock
MRCOOL Advantage Series 12k BTU Wall Mounted - Air Handler (R454B Refrigerant, 230V)
- TypeMini-Splits
- BTU Capacity12000BTU
- Tonnage1
Free delivery on Jan 08–13
Limited stock
MRCOOL Advantage Series 12k BTU Wall Mounted - Air Handler (R454B Refrigerant, 115V)
- TypeMini-Splits
- BTU Capacity12000BTU
- Tonnage1
Free delivery on Jan 08–13
Limited stock
MRCOOL Advantage Series 18k BTU Wall Mounted - Air Handler (R454B Refrigerant, 230V)
- TypeMini-Splits
- BTU Capacity18000BTU
- Tonnage1.5
Free delivery on Jan 08–13
Limited stock
- TypeMini-Splits
- BTU Capacity6000BTU
- Max. Coverage Area200sqft
Free delivery on Jan 08–13
Limited stock
MRCOOL Advantage Series 24k BTU Wall Mounted - Air Handler (R454B Refrigerant, 230V)
- TypeMini-Splits
- BTU Capacity24000BTU
- Tonnage2
Free delivery on Jan 08–13
Limited stock
- TypeMini-Splits
- BTU Capacity9000BTU
- Max. Coverage Area400sqft
Free delivery on Jan 08–13
Limited stock
MRCOOL Advantage Series 9k BTU Heat Pump - Condenser (R454B Refrigerant, 230V)
- TypeMini-Splits
- BTU Capacity9000BTU
- Max. Coverage Area400sqft
- Tonnage0.75
Free delivery on Jan 08–13
Limited stock
MRCOOL Advantage Series 9k BTU Heat Pump - Condenser (R454B Refrigerant, 115V)
- TypeMini-Splits
- BTU Capacity9000BTU
- Max. Coverage Area400sqft
- Tonnage0.75
Free delivery on Jan 08–13
Limited stock
MRCOOL Advantage Series 12k BTU Heat Pump - Condenser (R454B Refrigerant, 230V)
- TypeMini-Splits
- BTU Capacity12000BTU
- Max. Coverage Area500sqft
- Tonnage1
Free delivery on Jan 08–13
Limited stock
MRCOOL Advantage Series 12k BTU Heat Pump - Condenser (R454B Refrigerant, 115V)
- TypeMini-Splits
- BTU Capacity12000BTU
- Max. Coverage Area550sqft
- Tonnage1
Free delivery on Jan 08–13
Limited stock
- TypeMini-Splits
- BTU Capacity12000BTU
- Max. Coverage Area550sqft
Free delivery on Jan 08–13
Limited stock
MRCOOL Advantage Series 18k BTU Heat Pump - Condenser (R454B Refrigerant, 230V)
- TypeMini-Splits
- BTU Capacity18000BTU
- Max. Coverage Area800sqft
- Tonnage1.5
Free delivery on Jan 08–13
Limited stock
MRCOOL DIY 5th Generation 18k BTU Wall Mounted - Air Handler (R454B Refrigerant, 230V)
- TypeMini-Splits
- BTU Capacity18000BTU
- Max. Coverage Area800sqft
- Tonnage1.5
Free delivery on Jan 08–13
Limited stock
MRCOOL DIY 5th Generation 24k BTU Wall Mounted - Air Handler (R454B Refrigerant, 230V)
- TypeMini-Splits
- BTU Capacity24000BTU
- Max. Coverage Area1050sqft
- Tonnage2
Free delivery on Jan 08–13
Limited stock
MRCOOL Advantage Series 24k BTU Heat Pump - Condenser (R454B Refrigerant, 230V)
- TypeMini-Splits
- BTU Capacity24000BTU
- Max. Coverage Area1050sqft
- Tonnage2
Free delivery on Jan 08–13
Limited stock
MRCOOL DIY 5th Generation 36k BTU Wall Mounted - Air Handler (R454B Refrigerant, 230V)
- TypeMini-Splits
- BTU Capacity36000BTU
- Max. Coverage Area1550sqft
- Tonnage3
Free delivery on Jan 08–13
Limited stock
MRCOOL DIY 5th Generation 6k BTU Ceiling Cassette - Air Handler (R454B Refrigerant, 208-230V)
- TypeMini-Splits
- BTU Capacity6000BTU
- Max. Coverage Area200sqft
Free delivery on Jan 08–13
Limited stock
MRCOOL DIY 5th Generation 9k BTU Ceiling Cassette - Air Handler (R454B Refrigerant, 208-230V)
- TypeMini-Splits
- BTU Capacity9000BTU
- Max. Coverage Area400sqft
Free delivery on Jan 08–13
Limited stock
MRCOOL DIY 5th Generation 12k BTU Ceiling Cassette - Air Handler (R454B Refrigerant, 208-230V)
- TypeMini-Splits
- BTU Capacity12000BTU
- Max. Coverage Area550sqft
Free delivery on Jan 08–13
Limited stock
- TypeMini-Splits
- BTU Capacity18000BTU
- Max. Coverage Area750sqft
- Tonnage1.5
Free delivery on Jan 08–13
Limited stock
Customer Choice
- TypeMini-Splits
- BTU Capacity9000BTU
- Max. Coverage Area400sqft
- Tonnage0.75
Free delivery on Jan 08–13
Limited stock
MRCOOL DIY 5th Generation 18k BTU Ceiling Cassette - Air Handler (R454B Refrigerant, 208-230V)
- TypeMini-Splits
- BTU Capacity18000BTU
- Max. Coverage Area800sqft
Free delivery on Jan 08–13
Limited stock
Customer Choice
- TypeMini-Splits
- BTU Capacity18000BTU
- Max. Coverage Area800sqft
- Tonnage1.5
Free delivery on Jan 08–13
Limited stock
- TypeMini-Splits
- BTU Capacity27000BTU
- Max. Coverage Area1200sqft
- Tonnage2.25
Free delivery on Jan 08–13
Limited stock
MRCOOL DIY 5th Generation 9k BTU Heat Pump Mini Split - Complete System (454B Refrigerant)
- TypeMini-Splits
- BTU Capacity9000BTU
- Max. Coverage Area400sqft
- Tonnage0.75
Free delivery on Jan 08–13
Limited stock
- TypeMini-Splits
- BTU Capacity24000BTU
- Max. Coverage Area1050sqft
- Tonnage2
Free delivery on Jan 08–13
Limited stock
MRCOOL DIY 5th Generation 12k BTU Heat Pump Mini Split - Complete System (454B Refrigerant)
- TypeMini-Splits
- BTU Capacity12000BTU
- Max. Coverage Area550sqft
- Tonnage1
Free delivery on Jan 08–13
Limited stock
- TypeMini-Splits
- BTU Capacity36000BTU
- Max. Coverage Area1500sqft
- Tonnage3
Free delivery on Jan 08–13
Limited stock
MRCOOL DIY 5th Generation 18k BTU Heat Pump Mini Split - Complete System (454B Refrigerant)
- TypeMini-Splits
- BTU Capacity18000BTU
- Max. Coverage Area800sqft
- Tonnage1.5
Free delivery on Jan 08–13
Limited stock
MRCOOL DIY 5th Generation 24k BTU Heat Pump Mini Split - Complete System (454B Refrigerant)
- TypeMini-Splits
- BTU Capacity24000BTU
- Max. Coverage Area1050sqft
- Tonnage2
Free delivery on Jan 08–13
Limited stock
- TypeMini-Splits
- BTU Capacity48000BTU
- Max. Coverage Area2000sqft
- Tonnage4
Free delivery on Jan 08–13
Limited stock
MRCOOL DIY 5th Generation 36k BTU Heat Pump Mini Split - Complete System (454B Refrigerant)
- TypeMini-Splits
- BTU Capacity36000BTU
- Max. Coverage Area1550sqft
- Tonnage3
Free delivery on Jan 08–13
Limited stock
- TypeMini-Splits
- BTU Capacity55000BTU
- Max. Coverage Area2290sqft
- Tonnage4.6
Free delivery on Jan 08–13
- Overview
- Articles
Mini Split Air Conditioner for U.S. Homeowners in 2025
❄️ Key Facts: Mini split air conditioners represent the fastest-growing segment in residential HVAC, with U.S. sales increasing 300% over the past decade. These ductless inverter heat pumps deliver targeted cooling and heating while consuming 40-60% less energy than traditional central systems.
📈 Sales Growth
300% increase in U.S. sales over the past decade
⚡ Energy Savings
40-60% less energy consumption vs traditional systems
🔧 SEER2 Rating
Premium models achieve 20 efficiency ratings
What Makes Mini Split Air Conditioners Different from Traditional HVAC?
Mini split systems fundamentally differ from central air by operating without ductwork, using refrigerant lines to connect outdoor condensers with indoor air handlers. This design eliminates the 20-30% energy loss typical in ducted systems while enabling precise temperature control in individual rooms.
"The inverter technology in modern mini splits continuously adjusts compressor speed rather than cycling on and off like conventional systems. This variable-speed operation maintains consistent temperatures within 1-2 degrees while reducing energy consumption."
How Do You Calculate the Right Mini Split Size for Your Space?
Proper sizing determines system efficiency, comfort, and longevity. The basic calculation starts with 20-25 BTUs per square foot for standard ceiling heights, but multiple factors influence the final requirement. Room orientation significantly impacts heat load—south-facing rooms need 10-15% more capacity due to solar gain.
💡 Expert Tip: Oversizing mini splits reduces efficiency and comfort. Systems running at less than 40% capacity cannot effectively dehumidify, creating clammy conditions in humid climates. Professional load calculations using Manual J methodology ensure optimal performance.
Mini Split Sizing Quick Reference
| Room Size | Standard Capacity | High-Heat Load Areas | Well-Insulated Spaces |
|---|---|---|---|
| 150-250 sq ft | 6,000 BTU | 9,000 BTU | 6,000 BTU |
| 250-400 sq ft | 9,000 BTU | 12,000 BTU | 9,000 BTU |
| 400-650 sq ft | 12,000 BTU | 15,000 BTU | 12,000 BTU |
| 650-1000 sq ft | 18,000 BTU | 24,000 BTU | 15,000 BTU |
| 1000 sq ft | Multiple units or multi-zone system | Multiple units | Single large unit possible |
Which Mini Split Brands Deliver the Best Performance and Reliability?
MRCOOL
Offers excellent value with reliable performance and DIY-friendly installation options. Their systems feature Wi-Fi connectivity, energy-efficient operation, and comprehensive warranty coverage for residential applications.
What Are the True Costs of Mini Split Installation and Operation?
Equipment costs vary dramatically based on capacity and features. Basic 9,000 BTU single-zone systems start around $800-1,200, while premium multi-zone installations can exceed $8,000. Professional installation adds $1,500-3,000 for single zones.
Operating costs typically run 30-50% below equivalent central air systems. A 12,000 BTU mini split in moderate climates costs $200-400 annually to operate, compared to $400-800 for traditional systems cooling similar space.
Total Cost of Ownership Comparison (5-Year Period)
| System Type | Equipment Cost | Installation | Annual Operating | 5-Year Total |
|---|---|---|---|---|
| Mini Split (12k BTU) | $1,800 | $2,200 | $300 | $5,500 |
| Central AC (3-ton) | $3,500 | $4,500 | $650 | $11,250 |
| Window Units (equivalent) | $800 | $200 | $550 | $3,750 |
How Do Mini Splits Perform in Extreme Weather Conditions?
Cold weather performance separates quality systems from budget alternatives. Standard mini splits lose heating capacity as outdoor temperatures drop, with many units becoming ineffective below 20°F. Hyper-heating models maintain 100% capacity at 5°F and continue operating to -13°F.
🌡️ Heat Pump Efficiency: Even at 0°F, quality heat pumps deliver 150-200% efficiency (COP 1.5-2.0), meaning they produce twice the heat energy they consume. This efficiency advantage persists until temperatures reach -5°F to -10°F.
Can You Install Mini Splits Yourself, and Should You?
DIY installation is legally permissible in most states for homeowners working on their own property, but complexity varies significantly between systems. Pre-charged line sets eliminate the need for refrigerant handling, the most technical aspect of installation.
⚠️ Professional vs DIY: Professional installation ensures warranty coverage, code compliance, and optimal performance. Certified technicians perform vacuum testing, leak detection, and system commissioning that DIY installations often skip.
What tools are needed for DIY mini split installation?
Basic mechanical skills, electrical knowledge, drill, hole saw, level, refrigerant line bender, vacuum pump (for advanced installations), and proper safety equipment are essential for DIY installation.
When should you hire a professional instead of DIY?
Consider professional installation for multi-zone systems, difficult line routing, electrical work exceeding basic 240V connections, or when manufacturer warranty coverage is critical.
What Smart Features and Controls Should You Prioritize?
Smart connectivity transforms mini splits from simple temperature control devices into integrated home automation components. WiFi-enabled models allow remote monitoring and adjustment through smartphone apps, enabling pre-cooling before arriving home.
📱 Smart Control
WiFi connectivity, smartphone apps, voice control integration
⏰ Scheduling
Different temperature settings for occupied and unoccupied periods
📊 Energy Monitoring
Real-time power consumption and cost calculations
Maintenance Requirements and Long-Term Reliability
Mini split maintenance demands exceed traditional central air systems due to accessible indoor components requiring regular attention. Monthly filter cleaning or replacement ensures optimal airflow and efficiency.
🔧 Annual Maintenance Cost: Professional maintenance typically costs $150-300 and includes refrigerant level verification, electrical connection inspection, and system performance testing. Quality systems operating in favorable conditions often run 10-15 years with minimal service requirements.
Ready to Choose Your Mini Split?
Consider your space requirements, climate conditions, and budget to select the ideal mini split system for your home. Professional sizing and installation ensure optimal performance and longevity.
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