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The Verdict

The DELLA Vario Series 12000 BTU Mini Split is a high-efficiency climate solution for spaces up to 550 square feet, offering a premium feature set at a budget-friendly price point.

The Value
Its 20.5 SEER2 rating ensures significant energy savings, while the DC Inverter technology provides consistent cooling and heating even in temperatures as low as -4°F. The "I Feel" mode is a standout feature, using the remote control as a localized thermostat to eliminate hot spots. Operating at just 28 dBa, the indoor unit is whisper-quiet, making it ideal for bedrooms. The inclusion of Alexa and Wi-Fi compatibility provides modern smart-home control that is often an expensive add-on with other brands.

The Trade-offs
The primary hurdle is that this is not a DIY-friendly "Quick-Connect" system. It mandates professional installation, specifically requiring a vacuum pump to clear the line sets before releasing the refrigerant. Additionally, the included 78.7" drain pipe may be too short for certain high-wall installations, potentially requiring a minor hardware store run for an extension.

The Bottom Line
While you trade away the "plug-and-play" convenience of more expensive DIY brands, the DELLA Vario compensates with superior energy efficiency and advanced smart features that typically command a much higher premium. For those coordinating a professional install, the drastic reduction in noise and electricity costs makes this unit an unbeatable value for the price.

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Voltage110V - 120V208V - 240V110V - 120V208V - 240V208V - 240V110V - 120V208V - 240V
FeaturesWiFi Enabled / Smart Control, Dehumidifier Mode, Follow Me / Remote Thermostat, Quiet/Sleep Mode, Self-Cleaning FunctionWiFi Enabled / Smart Control, Dehumidifier Mode, Follow Me / Remote Thermostat, Quiet/Sleep Mode, Self-Cleaning FunctionWiFi Enabled / Smart Control, Dehumidifier Mode, Follow Me / Remote Thermostat, Quiet/Sleep ModeWiFi Enabled / Smart Control, Dehumidifier Mode, Follow Me / Remote Thermostat, Quiet/Sleep ModeWiFi Enabled / Smart Control, Follow Me / Remote Thermostat, Quiet/Sleep Mode, Dehumidifier ModeWiFi Enabled / Smart Control, Quiet/Sleep Mode, Dehumidifier Mode, Follow Me / Remote Thermostat, Self-Cleaning FunctionWiFi Enabled / Smart Control, Dehumidifier Mode, Follow Me / Remote Thermostat, Quiet/Sleep Mode
Installation TypeProfessional InstallationDIY (Pre-charged lines)Professional InstallationProfessional InstallationProfessional InstallationProfessional InstallationProfessional Installation
Heating PerformanceLow-Temperature Heating (Hyper Heat)Low-Temperature Heating (Hyper Heat)Low-Temperature Heating (Hyper Heat)Low-Temperature Heating (Hyper Heat)Low-Temperature Heating (Hyper Heat)Standard HeatingStandard Heating
Voice AssistantAlexaAlexaAlexaAlexaAlexaAlexa, Google AssistantAlexa
CertificationsEnergy Star, AHRI CertifiedAHRI CertifiedEnergy Star, AHRI CertifiedEnergy Star, AHRI CertifiedAHRI CertifiedEnergy Star, AHRI CertifiedAHRI Certified
Zones1 Zone1 Zone1 Zone1 Zone1 Zone1 Zone1 Zone
BrandDellaDellaDellaDellaDellaDellaDella
Unit TypeWall MountedWall Mounted—Wall MountedWall Mounted—Wall Mounted
Line Set Length16 ft16 ft16 ft16 ft16 ft16 ft16 ft

About this product

  • [ENERGY EFFICIENT COOLING] This 12000 BTU/h, 20.5 SEER2, 110-120V, ETL Listed, AHRI Certified pre-charged air conditioner unit features a ductless mini split inverter plus system with a heat pump (up to -4℉/-20℃) and DC Inverter technology provides up to 30% power savings.
  • [STRONG SYSTEM] This air conditioner is designed with several smart functions that make it easy to use: 4D air flow(up-down left-right), I feel mode, 24 hour timer, sleep mode, eco energy saving mode, multiple fan speeds, turbo function, heating, cooling and dry modes for dehumidifying. Maximum Fuse Size is 25A.
  • [AMPLE COVERAGE] This unit provides cooling and heating for up to 550 Sq. Ft and able to work in environments as low as -4 degrees Fahrenheit. Full installation kit included (Standard size 1/4" & 3/8" outer dimension copper pipes). The length for drain pipe is 78.7".
  • [SMART SENSOR & INSTALLATION] The unit will sense room temperature at the remote control, instead of at the indoor unit during cooling mode. It then adjusts airflow and temperature accordingly, resulting in the ultimate in personal comfort control and energy savings.Line-set vacuuming is required during installation. Any alteration of line-set length requires adjusting freon levels.This system mandates professional installation - it's not a DIY mini split AC.
  • [QUIET OPERATION] This air conditioner is ultra silent at only 28 dBa. The unit provides equal airflow in every part of your room and can adjust to 60-90 degrees Fahrenheit to suit your comforts in just a few minutes.

Specifications

Brand
Della
Model
TL-12K1VB-21S-I+O
BTU
12000 BTU
Zones
1 Zone
SEER2 Rating
21 SEER2
Voltage
110V - 120V
Features
WiFi Enabled / Smart Control, Dehumidifier Mode, Follow Me / Remote Thermostat, Quiet/Sleep Mode, Self-Cleaning Function
Installation
Professional Installation
Heating
Low-Temperature Heating (Hyper Heat)
Brand
Della
Voice Assistant
Alexa
Certifications
Energy Star, AHRI Certified
Unit Type
Wall Mounted
Line Set Length
16 ft
Width
31.94 inches
Height
11.5 inches
Depth
8 inches
Weight
61 pounds
Colour
White
Part number
048-TL-12K1V-19S-I+O
Manufacturer
DELLA
GTIN
00192928041385