Della 36K BTU 3-Zone Mini Split - Energy Efficient Multi Zone AC

In this review of the Della 36K BTU 3-Zone mini split, the bottom line is straightforward: this system is for homeowners or small commercial spaces that need targeted climate control across multiple rooms with strong energy savings. The system delivers a combined 36,000 BTU capacity with three indoor handlers (9K, 18K, 18K) and a 19 SEER2 rating, making the largest selling point its energy efficient cooling and multi-zone flexibility. Installation requires a professional, but once in place the unit provides quiet, controllable comfort and integrates with smart home setups.

Key Features

• Three-zone design: Separate indoor handlers for individual rooms give precise temperature control in each zone so occupants can set different comfort levels without wasting energy.
• High efficiency: The 19 SEER2 rating and DC inverter technology deliver lower operating costs and up to about 30% power savings compared with older non-inverter systems.
• Wide coverage: Rated to cool and heat up to 2,400 sq.ft, the combination of 9K, 18K and 18K indoor units suits mixed room sizes such as bedrooms, a living room, and a kitchen.
• Smart controls: Works with WiFi and Alexa, and uses the Della+ app for schedules, timers and remote operation so users can manage zones from a phone or voice assistant.
• All-season heat pump: The pre-charged heat pump provides heating down to extremely low temperatures (operational near -4F / -20C) for reliable winter use.
• Quiet operation: The outdoor and indoor units are engineered for low noise (around 50 dBa), making them suitable for bedrooms and living areas.

Who It's For

This multi-zone set is best for homeowners, small offices, or multi-room renovations where independent temperature control matters and a single central system is impractical. Users who value smart home integration and lower energy costs will appreciate the 19 SEER2 inverter performance and voice control support.

It is not for DIY installers or customers who need a plug-and-play window solution; professional installation is required and line-set vacuuming and correct refrigerant charge are essential. Those with only one small room to cool might find a single-zone unit a simpler option.

Pros & Cons

Pros

• Multiple indoor handlers allow targeted comfort and potential energy savings in multi-room setups.
• High efficiency inverter technology reduces run-time and lowers utility use compared with older systems.
• Smart features and Alexa support make scheduling and remote control straightforward.
• Pre-charged heat pump extends use into cold climates with reliable heating.

Cons

• Requires professional installation and proper refrigerant adjustment when line-sets are altered, so initial cost and setup are greater than portable units.
• The model does not actually perform the self-cleaning function despite showing the option on the display.

Specifications

Our Verdict

The Della 36K 3-zone mini split is a practical value for multi-room installations where zoning, energy efficiency and smart control matter. It requires professional installation but rewards owners with quiet operation, flexible zoning and lower ongoing energy use, making it a sensible investment for larger homes or small businesses that need reliable heating and cooling across several rooms.

Frequently Asked Questions

Does this system work with voice assistants?
Yes, the unit works with Alexa and connects via 2.4 GHz WiFi for voice and app control.

Is installation included?
The system ships with line sets and installation kits but professional installation is recommended and required for correct refrigerant charging.

Will it heat in very cold weather?
Yes, the pre-charged heat pump is rated to operate in very cold conditions (down to about -4F / -20C).