5 Best Alternatives to the Keystone 12 (2026)
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If you are looking for keystone 12 alternatives, this guide compares six mini splits that share similar specifications. The original unit delivers 12,000 BTU of cooling with a 23 SEER2 efficiency rating. It covers up to 550 square feet and operates on 230V power. The system includes a heat pump that functions down to -4°F and offers smart control via Alexa. Its indoor unit measures 31.9 inches wide and weighs 61 pounds. You might seek other options if you need a different voltage, a smaller footprint, or a distinct efficiency level.
We selected these alternatives because their core specs overlap with the original. All listed models provide 12,000 BTU cooling capacity and cover similar room sizes. They all run on 230V power and include Alexa integration. The list highlights variations in SEER2 ratings, which range from 17 to 24. Some units weigh significantly less, while others offer specialized airflow features. This approach helps you find a unit that matches your specific electrical setup and comfort needs without guessing.
Our top pick: DELLA Vario 12K BTU 23 SEER2.
How these models differ
DELLA Serena 12000 BTU 230V Mini Split
The Della Serena 22 SEER2 trades one SEER2 point for a lighter build. It weighs just 16.5 pounds compared to the original’s 61 pounds, making installation handling easier. The indoor unit is slightly narrower at 30.2 inches wide. You get the same 550 square foot coverage and Alexa integration. This model suits buyers who prioritize energy savings and easy mounting over the heaviest-duty chassis. The 22 SEER2 rating remains highly efficient for medium rooms.
DELLA Motto 12000 BTU 19 SEER2
The Della Motto 19 SEER2 offers a lower efficiency rating but includes Wi-Fi connectivity in addition to Alexa support. This allows for app-based control, which the original unit does not explicitly list. The physical dimensions are nearly identical, with a similar width and height. You sacrifice three SEER2 points for the added flexibility of remote app management. This option fits users who want smart home integration beyond voice commands and do not need the peak efficiency of the higher-rated models.
DELLA Econo 11,500 BTU 230V
The Della Econo 11,500 BTU unit reduces cooling capacity by 500 BTU while maintaining Wi-Fi and Alexa controls. It is the heaviest unit on this list at 67.2 pounds, indicating a more robust internal component build. The indoor unit is slightly shorter in height at 9.84 inches. You accept lower efficiency at 17 SEER2 in exchange for smart app features and a compact vertical profile. This model is best for rooms where maximum cooling power is less critical than smart connectivity.
DELLA Vita 12000 BTU 20 SEER2
The Della Vita 12,000 BTU 20 SEER2 matches the original’s cooling capacity but includes Wi-Fi connectivity alongside Alexa. It weighs significantly less at 18.7 pounds, offering easier handling during installation. The unit is slightly taller at 12 inches high. You give up three SEER2 points for the convenience of app-based control and a lighter chassis. This choice suits users who want full smart home integration and do not require the absolute highest efficiency rating available.
DELLA Optima 12k BTU Soft Airflow
The Della Optima 24 SEER2 provides the highest efficiency on this list and includes Wi-Fi control. It is the heaviest unit at 82.2 pounds and the widest at 36.2 inches. The cooling capacity remains at 12,000 BTU with the same 550 square foot coverage. You trade a heavier, larger footprint for superior energy efficiency and draft-free airflow technology. This model is ideal for users who prioritize peak performance and smart app access over compact dimensions and lighter weight.
Quick picks
| # | Product | Best for | Price |
|---|---|---|---|
| 1 | DELLA Vario 12K BTU 23 SEER2 Best premium | high-efficiency cooling in medium rooms | Check price of DELLA Vario 12K BTU 23 SEER2 on Amazon |
| 2 | DELLA Serena 12000 BTU 230V Mini Split Best budget | energy-efficient cooling with smart home integration | Check price of DELLA Serena 12000 BTU 230V Mini Split on Amazon |
| 3 | DELLA Motto 12000 BTU 19 SEER2 Best 19 seer2 | Medium rooms needing quiet smart cooling | Check price of DELLA Motto 12000 BTU 19 SEER2 on Amazon |
| 4 | DELLA Econo 11,500 BTU 230V Best 17 seer2 | Smart control and 230V efficiency | Check price of DELLA Econo 11,500 BTU 230V on Amazon |
| 5 | DELLA Vita 12000 BTU 20 SEER2 Best 20 seer2 | Medium rooms needing quiet, smart climate control | Check price of DELLA Vita 12000 BTU 20 SEER2 on Amazon |
| 6 | DELLA Optima 12k BTU Soft Airflow Also great | Draft-sensitive spaces and cold climates | Check price of DELLA Optima 12k BTU Soft Airflow on Amazon |
Our 6 picks
DELLA Vario 12K BTU 23 SEER2
Best for: high-efficiency cooling in medium rooms
- Cooling Capacity
- 12,000 BTU
- Efficiency Rating
- 23 SEER2
- Voltage
- 208-230V
- Coverage Area
- Up to 550 sq ft
- Heat Pump
- Heat Pump
- Smart Connectivity
- Alexa
This Della Vario mini split delivers 12,000 BTU of cooling and heating for spaces up to 550 square feet. It features a high 23 SEER2 efficiency rating and operates on 230V power. The unit includes a heat pump capable of working in temperatures down to -4°F. You get smart control via Alexa and a remote sensor for precise temperature adjustment. It runs quietly at 28 dBA, making it suitable for bedrooms or living areas.
Pros
- High 23 SEER2 energy efficiency rating
- Remote sensor tracks temperature at the controller
- Quiet operation at 28 dBA
- Heat pump works down to -4°F
Cons
- Requires professional installation and line-set vacuuming
- Limited to Alexa smart control only
- Maximum fuse size is 15A
Good fit if
- You need high efficiency for a 550 sq ft room
- You want quiet operation for a bedroom
- You have a 230V electrical circuit available
Skip if
- You require DIY installation without a professional
- You need smart home integration beyond Alexa
- Your space exceeds 550 square feet
Verdict: Della Vario 12k BTU 23 SEER2 offers top-tier efficiency and precise remote sensing for users with 230V power who value quiet, smart climate control.
DELLA Serena 12000 BTU 230V Mini Split
Best for: energy-efficient cooling with smart home integration
- Cooling Capacity
- 12000 BTU/h (1 ton)
- Efficiency Rating
- 22 SEER2
- Voltage
- 208V-230V
- Coverage Area
- up to 550 Sq.Ft
- Heat Pump
- heat pump
- Smart Connectivity
- Alexa, Google Home, DELLA app WIFI
The DELLA Serena is a 12,000 BTU heat pump with a 22 SEER2 efficiency rating. It covers up to 550 square feet and operates on 230V power. You get smart control via Alexa, Google Home, and the DELLA app. The unit runs quietly at 22 dBa in mute mode. It includes a 16.4ft installation kit and uses R32 refrigerant. This model suits you if you want high efficiency and voice control.
Pros
- High 22 SEER2 efficiency rating for energy savings
- Smart control via Alexa, Google Home, and DELLA app
- Ultra-quiet operation at 22 dBa in mute mode
- Includes 16.4ft installation kit with copper pipes
Cons
- Requires professional installation and line-set vacuuming
- Heavier build at 16.5 pounds compared to some competitors
- Indoor unit is 30.2 inches wide, which is bulkier
Good fit if
- You want high energy efficiency with a 22 SEER2 rating
- You need smart home integration with Alexa or Google Home
- You are installing in a room up to 550 square feet
Skip if
- You prefer a DIY installation without professional help
- You need a unit for spaces larger than 550 square feet
- You want a more compact indoor unit under 30 inches wide
Verdict: DELLA Serena 22 SEER2 12,000 BTU Mini Split offers top-tier efficiency and smart features for medium-sized rooms. It fits you well if you prioritize energy savings and voice control over a smaller footprint.
DELLA Motto 12000 BTU 19 SEER2
Best for: Medium rooms needing quiet smart cooling
- Cooling Capacity
- 12,000 BTU (1 Ton)
- Efficiency Rating
- 19 SEER2
- Voltage
- 208-230V
- Coverage Area
- Up to 550 sq ft
- Heat Pump
- Heat Pump
- Smart Connectivity
- Wi-Fi, Alexa, App control
The DELLA Motto Series is a 12,000 BTU ductless mini split heat pump rated at 19 SEER2. It cools and heats spaces up to 550 square feet. The unit operates at 27 dBA and uses R32 refrigerant. Smart features include Wi-Fi connectivity, Alexa support, and an I Feel sensor on the remote. It requires professional installation and a 230V circuit.
Pros
- 19 SEER2 efficiency rating for energy savings
- Ultra-quiet 27 dBA operation level
- Smart I Feel sensor tracks temperature at the remote
- 4D airflow with up-down and left-right control
- Works with Alexa and smartphone app
Cons
- Requires professional installation and line-set vacuuming
- Limited to 550 square feet coverage area
- No mention of Bluetooth connectivity in specs
Good fit if
- You need a quiet unit for a bedroom
- You want smart home integration via Alexa
- You have a 230V electrical circuit available
Skip if
- You require a DIY-friendly plug-in unit
- You need to cool a space larger than 550 sq ft
- You prefer 115V standard household outlets
Verdict: DELLA Motto 12k BTU 19 SEER2 is a solid mid-efficiency option for medium-sized rooms where quiet operation and smart controls matter. It fits users who already have 230V wiring and want Alexa integration.
DELLA Econo 11,500 BTU 230V
Best for: Smart control and 230V efficiency
- Cooling Capacity
- 11,500 BTU/h
- Efficiency Rating
- 17 SEER2
- Voltage
- 208-230V
- Coverage Area
- Up to 550 Sq. Ft
- Heat Pump
- Heat Pump
- Smart Connectivity
- DELLA app, Alexa
This Della unit offers 11,500 BTU cooling and heat pump functionality with a 17 SEER2 efficiency rating. It covers up to 550 square feet and operates on 230V power. The system includes smart control via the Della app and Alexa compatibility. You get four-way airflow and a smart sensor in the remote for precise temperature adjustments. It is designed for professional installation with a full kit included.
Pros
- 17 SEER2 efficiency rating for energy savings
- Smart control via Della app and Alexa
- Smart sensor in remote for accurate temperature reading
- Four-way airflow for even distribution
- Includes full 16.4ft installation kit
Cons
- Lower 17 SEER2 rating compared to 19 or 22 SEER2 alternatives
- Requires professional installation and line-set vacuuming
- Heating operation limited to 5 degrees Fahrenheit
Good fit if
- You want smart home integration with Alexa
- You need a 230V system for better efficiency
- You prefer remote-based temperature sensing
Skip if
- You require a 115V standard outlet connection
- You want DIY-friendly installation without vacuuming
- You need heating performance below 5 degrees Fahrenheit
Verdict: DELLA 11500 BTU 17 SEER2 Mini Split suits buyers who prioritize smart features and 230V efficiency over maximum SEER2 ratings. It is ideal for rooms up to 550 square feet where app control and remote sensing are valued.
DELLA Vita 12000 BTU 20 SEER2
Best for: Medium rooms needing quiet, smart climate control
- Cooling Capacity
- 12,000 BTU (1 Ton)
- Efficiency Rating
- 20 SEER2
- Voltage
- 230V
- Coverage Area
- Up to 550 sq ft
- Heat Pump
- Heat Pump
- Smart Connectivity
- Wi-Fi, Alexa, Google Assistant, App
The Della Vita Series delivers 12,000 BTU of cooling for spaces up to 550 square feet. It operates on 230V power with a 20 SEER2 efficiency rating. The unit includes Wi-Fi connectivity for app and voice control. It features an I Feel sensor for targeted temperature reading. This heat pump handles heating down to -4°F. It is a solid option for users seeking efficient climate control.
Pros
- 20 SEER2 efficiency rating for reduced energy use
- 12,000 BTU capacity covers up to 550 sq ft
- Ultra-quiet operation at 28 dB
- I Feel sensor reads temperature at the remote
- Heating performance down to -4°F
Cons
- Lower 20 SEER2 rating compared to 22 or 23 SEER2 competitors
- Requires professional installation for proper vacuuming
- 15A maximum fuse size limits circuit options
Good fit if
- You need a 230V system for a dedicated circuit
- You want smart control via Alexa or Google Assistant
- You prioritize quiet operation in bedrooms or offices
Skip if
- You require a 115V plug-in unit
- You need the highest possible efficiency rating available
- You are cooling a space larger than 550 square feet
Verdict: DELLA Vita 12k BTU 20 SEER2 is a well-rounded mini split for medium rooms. It suits buyers who value smart features and quiet performance over peak efficiency numbers. The 230V design ensures stable operation for year-round comfort.
DELLA Optima 12k BTU Soft Airflow
Best for: Draft-sensitive spaces and cold climates
- Cooling Capacity
- 12000 BTU
- Efficiency Rating
- 24 SEER2
- Voltage
- 230V
- Coverage Area
- up to 550 sq.ft
- Heat Pump
- 1 Ton Heat Pump
- Smart Connectivity
- Alexa or the Della+ app
The DELLA Optima Series is a 12,000 BTU heat pump designed for spaces up to 550 square feet. It achieves a high 24 SEER2 efficiency rating and operates on 230V power. This unit features a soft airflow design to prevent direct drafts and includes a "I Feel" sensor for precise temperature tracking. It supports Alexa and the Della+ app for smart control, making it a practical option for year-round comfort.
Pros
- 24 SEER2 efficiency rating for energy savings
- Soft airflow design prevents direct drafts
- "I Feel" sensor tracks temperature at the remote
- Heating operation down to -13°F
- Operates at 30dB in Mute Mode
Cons
- Heavier at 82.2 pounds compared to lighter competitors
- Larger indoor unit dimensions (36.2 inches wide)
- Requires vacuuming and a 15A fuse for installation
Good fit if
- You need quiet operation for a bedroom or nursery
- You want to avoid direct cold drafts
- You require heating in temperatures down to -13°F
Skip if
- You need a unit for spaces larger than 550 sq ft
- You prefer a lighter indoor unit for easy mounting
- You want a 115V plug-in model without hardwiring
Verdict: DELLA Optima 12k BTU Soft Airflow fits users who prioritize quiet, draft-free cooling and high efficiency in moderate-sized rooms. Its heavy build and specific installation requirements suit those willing to trade ease of handling for superior comfort features.
Specifications side by side
| Spec | DELLA Vario 12K BTU 23 SEER2 | DELLA Serena 12000 BTU 230V Mini Split | DELLA Motto 12000 BTU 19 SEER2 | DELLA Econo 11,500 BTU 230V | DELLA Vita 12000 BTU 20 SEER2 | DELLA Optima 12k BTU Soft Airflow |
|---|---|---|---|---|---|---|
| Cooling Capacity | 12,000 BTU | 12000 BTU/h (1 ton) | 12,000 BTU (1 Ton) | 11,500 BTU/h | 12,000 BTU (1 Ton) | 12000 BTU |
| Efficiency Rating | 23 SEER2 | 22 SEER2 | 19 SEER2 | 17 SEER2 | 20 SEER2 | 24 SEER2 |
| Voltage | 208-230V | 208V-230V | 208-230V | 208-230V | 230V | 230V |
| Coverage Area | Up to 550 sq ft | up to 550 Sq.Ft | Up to 550 sq ft | Up to 550 Sq. Ft | Up to 550 sq ft | up to 550 sq.ft |
| Heat Pump | Heat Pump | heat pump | Heat Pump | Heat Pump | Heat Pump | 1 Ton Heat Pump |
| Smart Connectivity | Alexa | Alexa, Google Home, DELLA app WIFI | Wi-Fi, Alexa, App control | DELLA app, Alexa | Wi-Fi, Alexa, Google Assistant, App | Alexa or the Della+ app |
| Smart Control | Alexa | Alexa | Wi-Fi, Alexa | Wi-Fi, Alexa | Wi-Fi, Alexa | Wi-Fi, Alexa |
| Dimensions | 8.07 × 31.9 × 11.5 inches | 7.87 × 30.2 × 11.8 inches | 7.91 × 31.2 × 11.5 inches | 7.91 × 30.6 × 9.84 inches | 7.48 × 31.9 × 12 inches | 7.68 × 36.2 × 12.1 inches |
| Weight | 61 pounds | 16.5 pounds | not specified | 67.2 pounds | 18.7 pounds | 82.2 pounds |
| Size | 12,000 BTU - 230V / 23 SEER2 | 12,000 BTU 230V - 22 SEER2 | 12000 BTU - 230V / 19 SEER2 | 11,500 BTU 230V - 17 SEER2 | 12,000 BTU - 230V / 20 SEER2 | CloudAir - 12,000 BTU - 230V - 24 SEER2 |
| Color | White | White | White | White | White | White |
| Model | TL-12K2VB-23S-I+O | 12K2VR-22S-M-I+O | 192928065794 | IF-11K2VR-17S-I+O | TC-12K2VR-20S-I+O | TPX-12K2V-24S-I+O |
If you want to compare similar cooling capacities, review the zafro 12 alternatives for matching specifications.
Frequently asked questions
Which Della mini split has the highest SEER2 rating?
The Della Optima CloudAir leads with a 24 SEER2 efficiency rating. It offers strong performance for medium-sized rooms up to 550 square feet. This model operates on 230V power and includes Wi-Fi and Alexa smart controls. Its heavy build at 82.2 pounds suggests a robust internal construction compared to lighter alternatives.
Do these alternatives require a 220V or 230V electrical connection?
All listed Della models require a 230V electrical connection. You cannot use standard 110V outlets with these units. This voltage requirement is consistent across the entire list, from the budget Serena to the premium Vario. Ensure your installation site has the correct 230V wiring before purchasing.
Which model is the lightest to install?
The Della Serena 12000 BTU is the lightest unit at 16.5 pounds. This makes it significantly easier to handle during installation compared to heavier competitors. The Della Vita follows closely at 18.7 pounds. Heavier models like the Optima weigh over 80 pounds, requiring more effort to mount.
Can I control these mini splits using voice commands?
Yes, all listed models support Alexa voice control. The Della Motto, Econo, Vita, and Optima also include built-in Wi-Fi for app management. The Vario and Serena specify Alexa integration, implying smart connectivity. This allows you to adjust settings remotely or via voice assistants in your home.
What is the maximum room size these units can cool?
Each model in this list covers up to 550 square feet. This capacity aligns with the 12,000 BTU output found in most units. The Della Econo covers a slightly smaller area at 11,500 BTU but still targets the same 550 square foot range. These sizes suit medium-sized rooms.
Which option is best for draft-sensitive spaces?
The Della Optima features Soft Airflow technology, also known as CloudAir. This design minimizes direct drafts, making it ideal for sensitive users. It combines this comfort feature with a high 24 SEER2 rating. The unit is heavier and wider, prioritizing airflow quality over compact dimensions.
How wide are the indoor wall units?
Indoor unit widths range from 30.2 to 36.2 inches. The Della Serena is the narrowest at 30.2 inches. The Della Optima is the widest at 36.2 inches due to its Soft Airflow design. Most other models fall between 31 and 32 inches wide. Check your wall space before mounting.