Della 17K BTU 2 Zone Review: Specs, Pros and Cons

What stands out

• 21 SEER2 efficiency rating for reduced energy consumption
• Two 12,000 BTU concealed ducted indoor air handlers
• Smart control via Della App and Alexa integration
• Built-in condensate pump for reliable drainage
• Operates as a heat pump down to -13°F

Who it fits

Key specs explained for this unit

Cooling Capacity: 17,000 BTU

This value indicates the total cooling power the outdoor unit provides. The system splits this capacity between two indoor handlers, each delivering 12,000 BTU. This configuration suits spaces up to 900 square feet. You get balanced cooling in two separate areas. Compare this to single-zone units if you need to control multiple rooms independently without running both at full power simultaneously.

Efficiency Rating: 21 SEER2

SEER2 measures seasonal energy efficiency under updated testing standards. A rating of 21 SEER2 suggests lower energy consumption compared to older or less efficient models. This spec helps you estimate operating costs over time. Higher numbers generally mean better value for long-term use. Look for this metric when comparing mini splits to ensure you select a model that minimizes electricity usage during peak seasons.

Number of Zones: 2 Zone

This indicates the system connects one outdoor unit to two indoor air handlers. You can control the temperature in each zone separately. This setup is ideal for homes with two distinct areas requiring different climate settings. It offers flexibility that single-zone units lack. Consider this feature if you need independent comfort control for separate rooms or floors without installing multiple outdoor condensers.

Voltage: 208-230V

This spec defines the electrical requirement for the outdoor compressor. It operates on standard residential split-phase power. You must ensure your home’s electrical panel supports this voltage range. This is common for most US households but differs from 115V plug-in units. Check your breaker capacity before installation. Proper voltage compatibility ensures stable performance and prevents tripping issues during high-load operation.

Design and Build Details

According to the listing, the indoor unit measures 27.5 inches in width, 19.3 inches in length, and 7.87 inches in height. It weighs 33.1 pounds. These dimensions allow the concealed ducted design to fit into standard ceiling cavities or attics without dominating the room. The white finish blends with most interior decor, while the low profile ensures a clean, seamless look when installed.

The system supports 0.4 inches of water column static pressure, which helps push air through complex ductwork in multi-story homes. Two return air positions offer flexible layout options for different room structures. The compact size means you can hide the unit out of sight, keeping your walls clear of bulky equipment. This design choice prioritizes aesthetics without sacrificing airflow capacity.

Control options include the DELLA App and Alexa integration for remote temperature management. Geolocation features allow the system to start before you arrive home. The unit operates quietly, with noise levels as low as 32 dB, making it suitable for bedrooms or living areas. Professional installation is required, as this is not a DIY system. The pre-charged refrigerant and included line sets simplify the setup, but you must adjust refrigerant for line sets over 25 feet. The durable build supports long-term operation with a built-in condensate pump.

Setup and Everyday Use Guide

This system requires professional installation and is not a DIY project. The outdoor unit operates on 208-230V power with a maximum fuse rating of 25A. It comes pre-charged with R454B refrigerant and includes two 25-foot copper line sets. If your installation needs longer lines, you must adjust the refrigerant charge accordingly. The indoor handlers are designed for concealed mounting in ceilings or attics. They feature two return air positions to support various layout needs. A built-in condensate pump ensures reliable water removal during operation.

For daily use, the system offers remote control via the Della App and Alexa integration. You can set temperatures between 60℉ and 90℉. The unit supports geolocation, allowing it to start cooling or heating before you arrive home. The inverter technology adjusts compressor speed automatically to maintain stable performance. This helps achieve up to 40% power savings compared to non-inverter models. The fan operates at seven speeds, moving 360 CFM of air. It also includes smart defrost and high-temperature self-cleaning modes.

Heating remains effective down to -13℉. Note that this is a dual-zone system. If all zones run at full capacity simultaneously, performance may slow because the total indoor capacity exceeds the outdoor unit’s output. For spaces with consistent high demand across both zones, consider a larger setup. The unit operates as low as 32 dB, keeping noise levels minimal during everyday use.

Before You Buy This Dual Zone Unit

Before you install this unit, verify your electrical panel can handle the 25-amp maximum fuse rating. The system runs on 208-230V, so confirm your home’s wiring matches these specifications. You must also check if your desired locations fit the 27.5-inch width and 7.87-inch height of the concealed indoor handlers. This model includes two 25-foot line sets, but you will need additional copper tubing if your ductwork extends beyond that distance. Refrigerant adjustment is required for any line set over 25 feet. Keep in mind that the total indoor capacity exceeds the outdoor unit’s output. This means cooling performance may slow if both zones run at full power simultaneously. For consistent high demand, consider a larger setup. Regular maintenance involves cleaning the filters and ensuring the built-in condensate pump functions correctly. This dual-zone option offers a clean aesthetic for multi-story homes, fitting well among other concealed units in the 1 options reviewed here.

Check before you buy

• Confirm your electrical panel supports 208-230V and 25A fuses.
• Check if ceiling cavities fit the 27.5 by 7.87 inch handlers.
• Measure line set distances to determine if extra refrigerant is needed.
• Verify if both zones will run at full power at the same time.

The product at a glance

1

Della 17K BTU 2-Zone Concealed Mini Split

Best for: Quiet, efficient concealed cooling for two zones

Cooling Capacity

17,000 BTU

Efficiency Rating

21 SEER2

Voltage

208-230V

Coverage Area

up to 900 Sq. Ft

Number of Zones

2 Zone

Heat Pump

Heat Pump

View on Amazon: Della 17K BTU 2-Zone Concealed Mini Split Affiliate link

This concealed ducted mini split delivers 17,000 BTU of cooling across two 12,000 BTU zones. It achieves 21 SEER2 efficiency with inverter technology. The system supports up to 900 square feet of coverage. It includes a built-in condensate pump and operates quietly at 32 dB. You get smart control via the Della App and Alexa. Professional installation is required for this 208-230V unit.

Pros

• 21 SEER2 efficiency rating with inverter technology
• Quiet operation at 32 dB noise level
• Built-in condensate pump for flexible drainage
• Smart control via Della App and Alexa

Cons

• Requires professional installation, not DIY
• Outdoor unit weighs 33.1 pounds
• Refrigerant adjustment needed for lines over 25 ft

Good fit if

• You want a concealed unit for ceilings or attics
• You need smart control via the Della App
• You require quiet operation at 32 dB

Skip if

• You prefer a DIY installation process
• You need to cool more than 900 sq ft
• You want a single-zone configuration

Verdict: Della 17K BTU 2 Zone Ducted Mini Split suits homeowners seeking a quiet, efficient concealed system with smart app control. It fits well in spaces where aesthetics and energy savings matter more than easy self-installation.

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See also

• della 17k btu 2 zone alternatives
• best della mini splits under 2500
• della 18k btu 2 zone review
• traeger wasatch 2 zone griddle review