Adding a mini split air conditioner to a home extension offers flexible, energy-efficient cooling without the complexity of ductwork. The DELLa Econo Series stands out as the overall best choice for its high efficiency and heat pump options, ideal for larger spaces. For budget-conscious buyers, the Garvee 11500 BTU Mini Split provides solid performance at a lower price, while the Senville AURA Series offers excellent energy savings with smart features. These units differ in capacity, features, and price, making it essential to weigh the size of your addition against your cooling expectations. Continue reading for a detailed review and help narrowing down your best fit.
Key Takeaways
- Capacity varies significantly; choosing the right BTU rating is key to efficient cooling of your addition.
- Energy efficiency ratings like SEER2 directly impact long-term operating costs and savings.
- WiFi and smart features are common in higher-end models but may add unnecessary complexity for some users.
- Installation ease can differ; some units are designed for DIY setup, others may require professional help.
- Price range is broad, but investing in a slightly higher capacity or efficiency rating can reduce future energy bills.
More Details on Our Top Picks
DELLA Econo Series 23000 BTU Mini Split Air Conditioner 17 SEER2, 230V, with Heat Pump and WiFi
This model stands out for its impressive 23,000 BTU capacity, making it ideal for sizable home additions up to 1500 sq. ft., especially when compared to smaller units like the Garvee 11500 BTU system. Its inverter technology not only boosts energy efficiency, saving up to 30% on power bills, but also ensures quieter operation—down to 41 dBa—which is beneficial for living spaces. The inclusion of WiFi and Alexa compatibility adds smart convenience, a feature less prominent in other models like the Albott unit. However, its need for professional installation and longer refrigerant lines (over 25 ft) introduces complexity and cost, making it less suitable for DIY installers or smaller projects. Overall, this pick is best for homeowners seeking a powerful, quiet, and smart climate control solution for large rooms or open-plan additions.
Pros:- High 23,000 BTU capacity effectively heats and cools up to 1500 sq. ft.
- Energy-efficient inverter technology reduces power consumption by up to 30%.
- Quiet operation with noise levels as low as 37 dBa.
- Smart features including WiFi and Alexa compatibility for remote control.
Cons:- Requires skilled professional installation, increasing upfront costs.
- Long refrigerant lines over 25 ft may need manual adjustment, complicating setup.
Best for: Homeowners adding large living spaces who prioritize high capacity, quiet operation, and smart features.
Not ideal for: DIY enthusiasts or those with small, simple spaces where a smaller, easier-to-install unit suffices.
- Cooling Power:22000 BTU
- SEER:17
- Voltage:230V
- Wattage:1294 watts
- Capacity:1.95 Tons
- Room Area:1500 sq. ft.
- Refrigerant:R-32
- Noise Level:41 dBa
Bottom line: This system is perfect for large, tech-savvy homeowners seeking powerful and quiet climate control with smart features.
Garvee 11500 BTU Mini Split AC/Heating System, WiFi Enabled, Energy Efficient, Wall-Mounted, Cools Up to 750 Sq.Ft
Compared with larger models like the DELLA Econo, the Garvee 11500 BTU system is well-suited for smaller rooms up to 750 sq. ft., offering reliable heating and cooling with a compact design. Its inverter technology ensures energy efficiency, and WiFi connectivity allows for remote monitoring, similar to the features on the Albott and Senville units. Its lower capacity makes it ideal for bedrooms, offices, or medium-sized living rooms, but it isn’t suitable for larger additions. The need for professional installation remains a consistent requirement, and its maximum distance limit of 15 meters might restrict placement flexibility. This model makes the most sense for users who want a dependable, energy-efficient solution for moderate spaces with smart control options.
Pros:- Reliable 11500 BTU cooling and heating capacity for spaces up to 750 sq. ft.
- Energy-efficient inverter technology reduces utility bills.
- WiFi connectivity enables remote control and monitoring.
- Quiet operation with sleep and mute modes.
Cons:- Requires professional HVAC installation, adding to initial costs.
- Limited to 750 sq. ft., making it unsuitable for larger spaces.
Best for: Owners of small to medium-sized rooms who want WiFi-enabled, efficient climate control.
Not ideal for: Large open-plan additions or spaces exceeding 750 sq. ft., where higher capacity units are necessary.
- Cooling Capacity:11500 BTU
- Voltage:115V
- Coverage Area:750 sq.ft
- Refrigerant:R32
- Temperature Range (Cooling):63-90°F
- Low Outdoor Temp Operation:Down to 5°F
- Maximum Installation Distance:15m/49ft
Bottom line: This system is ideal for small to medium rooms needing efficient, remote-controlled climate management.
DELLA Vario Series 12000 BTU Mini Split Air Conditioner with Alexa Compatibility, 23 SEER2, 1 Ton Heat Pump, Ductless Inverter System
Compared to the Garvee and Albott models, the DELLA Vario Series offers a higher SEER2 rating of 23, translating to greater energy savings and efficiency for spaces up to 550 sq. ft. Its quiet operation at just 28 dBa makes it ideal for bedrooms or home offices. The Alexa compatibility and sensor-based controls enhance convenience, similar to the Senville LETO, but with a slightly smaller coverage area. Its installation requires professional setup, including line-set vacuuming, which can add to costs. While it excels in efficiency and smart features, it’s less suited for larger additions due to its 12,000 BTU capacity. This system is best for those who prioritize energy savings, low noise, and smart home integration for mid-sized rooms.
Pros:- High 23 SEER2 rating for maximum energy efficiency.
- Very quiet operation at only 28 dBa.
- Smart features including Alexa compatibility and sensor control.
- Includes full installation kit for easier setup.
Cons:- Requires professional installation, increasing cost and complexity.
- Limited coverage area restricts use for larger additions.
Best for: Homeowners needing efficient, quiet, and smart climate control for smaller or medium rooms.
Not ideal for: Large spaces or additions exceeding 550 sq. ft., where higher capacity units are needed.
- BTU:12000 BTU
- SEER:23
- Voltage:208-230V
- HSPF:9.5
- Coverage:550 sq. ft
- Temperature Range:Down to -4°F
- Installation Kit Length:16.4 ft
- Sound Level:28 dBa
Bottom line: This pick suits users looking for a quiet, energy-efficient, and smart-controlled solution for modest spaces.
Albott Mini Split Air Conditioner and Heater, 12,000 BTU, SEER2 18, 115V Inverter Energy-Efficient AC with Self-Cleaning, Remote and APP Control, Easy Installation, Cools up to 750 Sq.Ft
Compared with the DELLA Vario, the Albott system offers a slightly lower SEER2 of 18 but emphasizes ease of use with self-cleaning features and app control, making it appealing for those who want low-maintenance operation. Its 12,000 BTU capacity matches the Senville LETO, suitable for spaces up to 750 sq. ft., but it doesn’t quite match the high smart integration of the DELLA or Senville units. The quiet operation below 29 dB is comparable, and the 5-year compressor warranty adds peace of mind. However, installation may require professional help, and its slightly lower efficiency rating means higher operational costs over time. This model fits best for users who prioritize simple operation, low maintenance, and reliable smart controls in moderate spaces.
Pros:- Energy-efficient SEER2 18 rating for moderate operational costs.
- Self-cleaning feature reduces maintenance effort.
- Remote and app control for easy operation.
- Quiet performance at below 29 dB.
Cons:- Installation still requires professional expertise.
- Limited coverage area makes it unsuitable for large additions.
Best for: Homeowners seeking an easy-to-maintain, energy-efficient unit with smart controls for medium-sized rooms.
Not ideal for: Larger additions or those wanting the highest SEER2 efficiency or smart features.
- BTU:12000
- SEER2:18
- Voltage:115V
- Coverage Area:750 sq.ft.
- Temperature Range:5°F to 122°F
- Warranty:5-year compressor, 7-year parts
Bottom line: This unit is ideal for users who want reliable, low-maintenance comfort control with smart features in medium-sized spaces.
Senville LETO Series Mini Split Air Conditioner Heat Pump, 12000 BTU, 110/120V, Inverter, Works with Alexa, SEER2 20.8, 1 Ton, White
The Senville LETO offers impressive efficiency with a SEER2 of 20.8, surpassing most others in this roundup, making it a strong choice for energy-conscious homeowners. Its 12,000 BTU capacity matches the Albott and DELLA models but with the added advantage of a high-efficiency inverter and smart Alexa integration, providing seamless remote operation. Its quiet operation at 28 dBa ensures minimal disruption, especially in bedrooms or quiet zones. The comprehensive installation kit simplifies setup, though professional installation remains recommended, especially for optimal refrigerant line-length adjustments. Compared with the DELLA Vario, the Senville offers higher efficiency and smart features but at a higher cost. It’s best suited for those seeking maximum energy savings and smart home compatibility in moderate-sized spaces.
Pros:- High SEER2 rating of 20.8 for maximum energy savings.
- Smart Alexa compatibility for remote voice control.
- Quiet operation at 28 dBa.
- Includes a full installation kit for easier setup.
Cons:- Higher upfront cost compared to less efficient units.
- Requires professional installation, adding to expense.
Best for: Tech-savvy homeowners who prioritize energy efficiency and smart home integration in medium-sized rooms.
Not ideal for: Larger spaces needing higher BTU capacity or users on a tight budget due to the higher price point.
- Cooling Power:12000 BTU
- SEER:20.8
- Capacity:1 Tons
- Voltage:110V
- Refrigerant:R-454B
- Sound:28 dBa
Bottom line: This model excels for users who want maximum efficiency and smart control in a moderate space, accepting a higher initial investment.
COSTWAY 12000 BTU Mini Split Air Conditioner & Heater, 20 SEER2, Wall-Mounted Ductless AC Unit with Heat Pump
This unit stands out for its impressive 20 SEER2 rating, making it one of the most energy-efficient options for small to medium rooms up to 750 sq. ft. It offers a well-rounded package with inverter technology, multiple modes, and quiet operation, making it a strong choice for both comfort and cost savings. While installation requires a licensed professional and it’s somewhat heavy at 68 pounds, its self-cleaning and auto-defrost features reduce maintenance worries. Compared with alternatives like the Senville AURA Series with higher BTU capacity, this model offers better energy efficiency for typical home additions. Its tradeoff is that larger spaces or multi-room setups will need a different system.
Pros:- Energy-efficient inverter technology reduces power consumption
- Multiple modes including auto, dry, fan, and heat for versatile comfort
- Quiet operation ideal for bedrooms and living rooms
- Self-cleaning and auto-defrost for low maintenance
Cons:- Installation must be performed by a licensed HVAC technician
- Heavy weight may complicate installation process
- Limited to smaller rooms, not suitable for larger additions
Best for: Homeowners seeking a highly efficient, quiet system for a single room or small addition up to 750 sq. ft.
Not ideal for: Larger spaces or multi-zone needs, since it’s limited to 750 sq. ft. and requires professional installation.
- Cooling Power:12000 BTU
- Heating Power:12000 BTU
- SEER:20
- Voltage:115V
- Noise Level:23 Decibels
- Refrigerant:R-32
- Control Method:Remote
- Warranty:5 Years Parts, 8 Years Compressor
Bottom line: This model makes the most sense for budget-conscious homeowners wanting reliable, efficient climate control in small to medium spaces.
Senville AURA Series Mini Split Air Conditioner Inverter Heat Pump, 24000 BTU, Works with Alexa, Energy Star, White
The Senville AURA Series offers a robust 24,000 BTU capacity, making it suitable for larger home additions or open-plan spaces. Its Energy Star certification ensures energy efficiency, while Alexa compatibility introduces convenient voice control, a feature that sets it apart from many competitors like the Mini Split AC/Heating System – 12000 BTU. However, it requires professional installation and is bulkier, which might be a challenge for tight spaces. Its noise level at 36 decibels is reasonable, though less quiet than smaller units. Compared to smaller models, this unit suits users prioritizing high capacity and smart home integration over compact size.
Pros:- High 24,000 BTU capacity for large spaces
- Works with Alexa for voice and app control
- Energy Star certified for efficiency
- Reliable performance in extreme temperatures
Cons:- Requires professional installation, increasing upfront cost
- Larger size may limit placement options
- Less emphasis on quiet operation compared to smaller units
Best for: Homeowners needing powerful heating and cooling for larger rooms or open-plan additions with smart home integration.
Not ideal for: Small spaces or users seeking a DIY-friendly or budget-friendly mini split system.
- Cooling Power:24000 BTU
- Color:White
- Noise:36 Decibels
- Refrigerant:R-454B
- Inverter Type:Has Inverter
- Outdoor Unit Required:Yes
Bottom line: This pick is best for households that need significant heating and cooling power combined with smart home features, accepting the higher installation complexity.
Mini Split AC/Heating System – 12000 BTU Ductless Mini Split Air Conditioner with Heat Pump, 19 SEER2, 115V, Energy Efficient for Up to 750 Sq.Ft
This model balances affordability with good energy efficiency, boasting a 19 SEER2 rating and suitable for spaces up to 750 sq. ft. It’s similar in capacity to the COSTWAY 12000 BTU but offers additional eco-friendly features like ECO mode and dehumidification. Its inverter technology ensures lower energy costs and quieter operation, although it requires professional installation due to its split system setup. Compared to premium options like the Senville AURA, it provides a more budget-friendly choice with decent efficiency, though it might fall short in extreme temperature performance. Its wattage at 1100 watts is on the higher side for some energy-conscious users, and effectiveness drops in very cold outdoor conditions.
Pros:- Energy-efficient with 19 SEER2 rating reduces costs
- Provides both cooling and heating for year-round use
- Multiple operating modes including ECO and dehumidification
- Suitable for spaces up to 750 sq. ft.
Cons:- Requires professional installation, adding to costs
- Less effective in outdoor temperatures below 19.4°F
- Higher wattage may impact energy bills for some users
Best for: Homeowners seeking an affordable, energy-efficient climate control system for small to medium rooms, willing to invest in professional installation.
Not ideal for: Very cold climates or DIY enthusiasts who prefer simpler window units or portable systems.
- Cooling Power:12000 BTU
- Heating Power:12500 BTU
- SEER2:19
- Wattage:1100 watts
- Refrigerant:R-32
- Room Capacity:750 Sq.Ft
Bottom line: This system offers an excellent balance of price and efficiency for small to medium additions, provided you are prepared for professional setup.
Senville 28000 BTU Dual Zone Mini Split Air Conditioner Heat Pump, 2 Ton, Works with Alexa
The Senville 28000 BTU Dual Zone offers flexible climate control across two separate zones, making it ideal for larger home additions or multi-room setups. Its 2-ton capacity provides ample cooling and heating, surpassing single-zone options like the Mini Split AC/Heating System – 12000 BTU. Its compatibility with Alexa adds convenience, and the 10-year warranty boosts confidence in its durability. However, the higher cost and complex installation process mean it’s better suited for those with multiple rooms or commercial projects. While its dual-zone setup reduces the need for separate units, it’s a bulkier system that demands significant space and professional installation expertise.
Pros:- Allows independent temperature control for two zones
- Works with Alexa for voice and remote app control
- Energy Star certified for efficiency
- Long 10-year warranty for peace of mind
Cons:- Requires professional installation, adding upfront costs
- Higher initial investment than single-zone units
- Bulkier system footprint may limit placement options
Best for: Homeowners needing comprehensive multi-room control in larger or multi-zone additions, valuing voice control and long-term reliability.
Not ideal for: Small or single-room spaces, or users seeking a simple, DIY-friendly system with minimal setup.
- BTU:28000
- Zones:Dual
- Capacity:2 Ton
- Voltage:208-230V
- Heat Pump Operating Temp:Up to -22°F
- Warranty:10 years
Bottom line: This dual-zone system is ideal for larger additions or multi-room control, especially when smart features and durability matter most.
How We Picked
The products in this roundup were evaluated based on their cooling capacity, energy efficiency, ease of installation, and smart features. We prioritized models that are specifically suitable for home additions, typically between 750 and 1,500 square feet, ensuring they deliver adequate cooling power. Durability, maintenance requirements, and user control options also influenced our rankings. To compare value, we balanced upfront costs against long-term operational savings, emphasizing units that offer the best combination of performance and affordability for home extension projects.Factors to Consider When Choosing Best Mini Split Air Conditioners For Home Additions
Choosing the best mini split for a home addition requires careful consideration of several factors. Beyond just capacity, you should evaluate energy efficiency, installation requirements, and smart features to ensure the unit fits your specific needs and budget. Making the right choice can result in lower energy bills, easier setup, and reliable performance over many years.Cooling Capacity and Size
Matching the mini split’s BTU rating to your space is vital. An undersized unit will struggle to cool the area effectively, leading to higher energy use and frustration. Conversely, an oversized unit may cool too quickly, leading to short cycling and inefficiency. Accurately measuring your addition and considering ceiling height and insulation levels helps determine the right capacity, typically between 9,000 and 18,000 BTU for most small to medium additions.
Energy Efficiency and Operating Costs
High SEER2 ratings translate into lower electricity bills over time, especially if the unit runs frequently. While higher efficiency models often cost more upfront, they tend to pay off through reduced energy consumption. When selecting a unit, compare the SEER2 ratings carefully, and consider the local climate — in warmer areas, investing in the most efficient model might be worth the extra initial expense.
Ease of Installation and Maintenance
Some mini splits are designed for straightforward DIY installation, which can save money and time, but may require technical confidence. Others, especially larger or more complex units, might need professional installation to ensure proper operation. Maintenance features like self-cleaning and remote diagnostics can simplify ongoing care, extending system lifespan and reducing service costs.
Smart Features and Connectivity
Smart controls, including WiFi and app compatibility, add convenience and allow remote management, which can be especially helpful for busy households. However, these features can increase initial costs and potential points of failure. Consider whether you want a fully connected system or prefer a simpler, manual control interface based on your comfort with technology.
Price, Capacity, and Long-term Value
While budget options can work well in smaller or less-used spaces, investing in a higher-capacity or more efficient unit can yield savings and comfort benefits over time. Balance your upfront investment against the expected energy savings and the longevity of the unit. It’s often worth paying a bit more for a system that provides reliable, quiet, and efficient operation for years to come.
Frequently Asked Questions
Can I install a mini split myself in a home addition?
Many mini split systems are marketed as DIY-friendly, especially smaller models with straightforward mounting and minimal refrigerant handling. However, proper installation is critical to ensure efficiency, safety, and warranty validity. If you lack experience with electrical wiring and refrigerant systems, hiring a professional may be the better choice. Even with DIY models, consulting the installation manual carefully can prevent common mistakes and ensure optimal operation.
How do I select the right BTU capacity for my addition?
Calculating the proper BTU rating involves measuring your space, accounting for insulation, window size, and climate. As a general rule, 9,000 to 12,000 BTU units suit smaller rooms, while larger additions up to 1,500 square feet may need 18,000 BTU or more. Overestimating capacity can lead to inefficient cycling, while underestimating results in poor cooling. Consulting a professional or using online calculators can help you choose the most appropriate size for your specific situation.
Are energy-efficient mini splits worth the higher upfront cost?
Higher SEER2 rated units typically cost more initially but offer significant savings through lower energy bills over their lifespan. For a home addition that will be used regularly, investing in a more efficient model can reduce operating costs considerably. Additionally, energy-efficient systems tend to run more quietly and last longer due to less strain on components. If budget permits, choosing a high-SEER unit generally provides better long-term value.
What maintenance does a mini split require?
Mini splits require minimal maintenance but benefit from regular filter cleaning or replacement, typically every few months. Some models feature self-cleaning functions that reduce mold and dust buildup, extending the system’s lifespan. Periodic checks of refrigerant levels and electrical components can prevent issues, but most maintenance tasks are straightforward. Proper upkeep ensures consistent performance and helps avoid costly repairs down the line.
Should I prioritize smart features or simplicity in my mini split?
Deciding between smart features and a simple control interface depends on your preferences and tech comfort level. Smart features like WiFi and app control offer convenience, especially if you want to adjust settings remotely. However, they can add complexity and cost. For users who prefer straightforward operation, models with manual remote controls may be better, providing effective cooling without unnecessary bells and whistles. Think about your comfort with technology and how often you plan to adjust settings when making your choice.
