Della Mini Split Reviews 2025

The ductless mini split air conditioners produced by Della have attracted attention due to their low cost without compromising performance. The units provide a good balance of price and performance, which makes them an attractive option for cost-conscious customers.

Here we are going to review the entire Della mini split product line and compare it to other leading brands such as MrCool, Pioneer, and Senville. We will consider actual user and professional reviews to evaluate Della mini splits in terms of cooling/heating efficiency, energy consumption, noise level, ease of installation, design/features, warranty, customer support, and overall value.

Brand	Price Range (12,000 BTU Class)	Efficiency (SEER)	Installation	Notable Features	Warranty
Della	Low ($600–$800)	~17–21 SEER2	DIY possible (vacuum pump needed); Pro install recommended	Wi‑Fi/Alexa on many models; Includes line set kit	5‑yr parts, 10‑yr compressor (lifetime with registration)
MrCool	Mid‑High ($1,200+)	~20–22 SEER	DIY friendly (pre‑charged quick‑connect)	Pre‑charged lines, DIY install kit, smart app	5‑yr parts, 7‑yr compressor (limited lifetime compressor with registration)
Pioneer	Low‑Mid ($700–$900)	~16–22 SEER	DIY or Pro (pro install required for warranty)	Established support, some models Wi‑Fi capable	5‑yr parts & compressor (with registration)
Senville	Mid ($800–$1,100)	~19–25 SEER	Pro install recommended	Ultra‑quiet models, Energy Star options, Alexa integration	5‑10 yr compressor, 2‑5 yr parts (varies by series)

Della Mini Split Product Line and Features

Capacity Options: Della single-zone mini split heat pump systems are available in several sizes: 9,000 BTU, 12,000 BTU (1 ton), 18,000 BTU (1.5 ton), and 24,000 BTU (2 ton). These cover rooms approximately 300-400 sq. ft. (9k BTU) to roughly 1,400-1,500 sq. ft. on the largest 24k unit.

As an example, the 24,000 BTU model is a comfortable cooling or heating option for a large area (~1,500 sq. ft.) and remains a relatively inexpensive choice. Della also offers multi-zone systems (dual and tri-zone) to cool multiple rooms using a single outdoor compressor.

Inverter Heat Pump Technology: Della mini splits are all inverter-driven ductless heat pumps, which means they both cool and heat. They feature effective variable-speed compressors that utilize environmentally friendly R32 refrigerant.

The units come pre-charged with refrigerant and include the necessary line set and wiring kits for installation. This means copper lines, control cable, and mounting hardware are included in the box, providing additional value to buyers. The outdoor units are factory filled with sufficient refrigerant to cover the length of line included (usually ~10-16 feet).

Smart Features: Della has adopted smart home integration in most of its products. The Della+ mobile app (iOS/Android) enables remote control and programming of the AC via Wi-Fi, and the units are compatible with voice control through Amazon Alexa or Google Assistant on WiFi Enabled models.

The 12,000 BTU models, in particular, boast a vast array of smart capabilities: the remote has built‑in temperature sensors (I Feel mode), 24‑hour programmable timer, and operating modes such as Sleep, Eco (energy-saving), Auto, and Dry (dehumidification). Higher series (the Motto or Umbra/Vita series) offer 4-way airflow control (swing louvers up-down and left-right) and a Turbo mode for rapid cooling. Essentially, Della packs all the standard modern mini split features—auto-restart, self-diagnosis, multiple fan speeds, LED display—into a low-cost package.

Design and Build: The indoor air handler units feature a clean, streamlined design. Expert reviews have pointed out that the Della unit has the sleekest appearance among their choices, with a thin profile and plain white finish that fits most interiors.

The outdoor condenser units are compact and can be placed on the ground or mounted on wall brackets. Components like the fan and coil are comparable to other brands (Della is an import brand manufactured in Asia). The build quality is generally good for the price but may not be as heavy-duty as top brands. Remarkably, Della offers some units in both 115V and 230V models; the smaller 9k and 12k BTU units can operate on standard 110-115V circuits, making installation easier in older homes without 230V lines.

Performance and Efficiency

Cooling & Heating Performance: Della mini splits deliver on their promise, effectively cooling or heating the target area. Users frequently report that the units are powerful coolers, maintaining comfortable temperatures even during hot summer days.

Della heat pumps provide very warm heat in winter: one customer in a cold climate noted that the heat mode was much warmer than expected compared to their central heat pump. Most Della heat pumps are designed to operate in outdoor temperatures as low as about ‑4°F (‑20°C), suitable for mild to moderate winters. Newer “Hyper Heat” models operate down to 13°F below zero with over 22 SEER2 efficiency.

Energy Efficiency: Della’s efficiency ratings are comparable to other mid-tier mini splits. Most single-zone models have Seasonal Energy Efficiency Ratio (SEER) ratings in the high teens to low 20s (approximately 17-20 SEER2, or 19-22 SEER in older scales).

A popular 12k BTU Della model rates at 20 SEER2, making it energy-efficient comparable to many Pioneer and Senville models. Certain Della products are Energy Star rated—an Alexa-enabled 12k unit at 20 SEER2 and a Vita series unit at 21 SEER2. Practically, these models reduce cooling expenses compared to conventional window AC units, encouraging most users to upgrade. Despite not reaching the ultra-high 25-30 SEER of the most costly brands, Della remains highly efficient, promising low operating costs for homeowners.

Coverage and Sizing: Proper sizing is essential for optimal performance. Della recommends rough room sizes per capacity (e.g., 9k BTU for ~350-400 sq. ft., 12k for up to ~550-600 sq. ft., 18k for ~800-1,000 sq. ft., 24k for ~1,300-1,500 sq. ft.), based on average ceiling heights and insulation.

Customers report that when properly sized or moderately oversized, Della mini splits cool quickly and maintain set temperatures effectively. Undersized units may struggle on very hot days, a common issue across brands. Fortunately, Della offers a broad size range for small bedrooms to open living spaces and multi-zone options to cover larger homes flexibly.

Noise Level and Indoor Comfort

Della mini splits are praised for their quiet operation, especially the indoor air handlers. According to manufacturer data, indoor noise levels are approximately 27 dB on low fan speed—comparable to rustling leaves. Many users confirm that the indoor unit is almost unnoticeable when running on low.

Reviewer comments frequently describe the units as incredibly quiet; one reviewer even needed to check up close to determine if the unit was on. Noise increases at full fan speed, with the largest 24k BTU models producing around 51 dB, similar to a standard fan. The outdoor condenser emits a low humming sound, often described as whisper-quiet or resembling white noise. Buyers report that this noise is much less disruptive than typical window or portable AC units. One user noted that their outdoor unit was so quiet it seemed off during operation.

Minor noise instances include occasional faint gurgling or clicking as refrigerant flows or the plastic cabinet expands and contracts. These are rare and not cause for concern. Overall, Della rates highly in noise comfort, especially for bedrooms and living rooms.

While high-end brands may report lower decibel levels on paper, the real-life noise difference is minimal. Della provides a quiet environment satisfactory for most users.

Installation and Ease of Setup

DIY Installation: Many homeowners consider Della because of the potential for DIY installation. Although not as straightforward as MrCool’s DIY kits with pre-connected lines, Della systems are designed to be fairly manageable.

Units include a pre-flared copper line set, control cables, drain hose, and wall mounting bracket. The installation manual is detailed, with many parts labeled. Some users have installed Della units with little or no professional help. For example, one Reddit user managed a largely DIY install of an 18k unit and only required a local HVAC technician to test connections and vacuum lines at an approximate cost of $75. This semi-DIY approach can be satisfying and cost-effective.

Professional Installation: Similar to most mini splits, Della’s warranty is valid only if the system is installed per proper procedures, usually by a licensed HVAC professional. Improper installation may void the warranty.

Many buyers self-install but are advised to have a professional handle final steps—vacuuming, charging with refrigerant, and leak-testing. Even after paying for professional labor, the total cost remains significantly lower than higher-priced DIY brands. While hiring a contractor might slightly increase install costs, most pros find installing Della straightforward due to the complete kits and clear instructions.

Installation: Della mini splits follow standard ductless system installation: wall-mounting the indoor unit, drilling a ~3-inch hole for lines and wiring, placing the outdoor condenser on a pad or bracket, running refrigerant lines, wiring electrical connections, and evacuating lines before charging.

Smaller 9k and 12k BTU units operating on 115 V can plug into dedicated outlets or hard-wire into a 15-20 A circuit. Larger 230 V units require dedicated 220-240 V circuits with disconnects. Buyers should provide extra supplies not included, such as PVC line covers and electrical disconnect boxes as needed.

The overall installation complexity is moderate. Many DIY enthusiasts have completed installs, though novices may prefer professional help. Della’s strategy balances between expensive turnkey DIY systems and low-end imports, reinforcing its value proposition.

Value for Money

Della units are affordable, priced below most competitors. Often, a Della mini split costs 30-50% less than similarly sized units from established brands. For example, a 12,000 BTU Della model with Wi-Fi runs about $650-700 compared to $1,200-1,500 for a MrCool DIY kit and over $1,000 for comparable Senville or Mitsubishi units. This significant price difference is widely praised.

Despite the low price, Della does not compromise basic features, leaving most customers feeling they receive excellent value. Many buyers replacing window ACs with Della mini splits report excellent comfort and efficiency without increased energy bills. Accessories such as installation kits and remotes come included at no extra cost, unlike some other brands. While installer costs may factor in, Della’s pricing remains very competitive for those willing to invest effort.

Value extends beyond initial cost to long-term reliability and maintenance, which will be addressed later. Overall, Della scores high on features per dollar, delivering effective cooling/heating and modern functions at a fraction of high-end prices. This combination has driven growing popularity among budget-conscious homeowners.

Warranty and Customer Service

Warranty Coverage: Della’s warranty policy is strong on paper. New units come with a 5-year parts warranty and a 10-year compressor warranty. Additionally, owners registering products bought in 2024 or later receive a free lifetime warranty on parts and compressor.

This industry-leading offer promises indefinite part replacements for failures, providing confidence in product longevity. However, this applies only to parts, not labor, and likely requires professional installation and maintenance to be honored. Nevertheless, a lifetime parts warranty at this price point is impressive.

Customer Support Experience: Della’s relatively short market presence means customer service is not as highly rated as established brands. Some customers report positive experiences such as useful troubleshooting and warranty part shipments.

Support may take 12-18 hours due to time zone differences, as Della lacks extensive local centers but provides email and phone contacts. Contrarily, some users report difficulties obtaining replacement parts or experiencing delays. Owners with multiple units have mentioned challenges in securing parts after failures. These mixed experiences highlight occasional slower or more complicated warranty service typical for low-cost imports compared to domestic brands with large U.S.-based support.

Reliability: Overall reliability seems solid with some exceptions. Many owners enjoy trouble-free operation for years. For example, an HVAC technician using two Della units for 2+ years reported dependable heating and cooling across New England seasons.

Few wear-and-tear issues are common; most users only clean filters routinely. Some report early defects such as faulty control boards or refrigerant leaks on new units. While not widespread, these occur and are generally covered under warranty if reported promptly. Expert analysis shows most customers are satisfied with the units’ value and performance in cooling large spaces. The most common complaint involves remote controls with battery-consuming backlights.

Though parts warranty can cover major failures, obtaining replacements may require patience. For many, initial cost savings outweigh potential warranty inconveniences.

Regarding customer service rating, Della may lag behind brands like Pioneer and Senville, which maintain U.S. offices and support lines. However, Della promotes 24/7 support and a robust online help center. While support wait times may exist, most users ultimately resolve issues through retailers, Della, or technicians.

It is also notable that many common troubleshooting tasks can be handled by skilled HVAC technicians since Della shares parts with other brands.

Della vs Other Mini Split Brands

What are the comparisons of Della with popular competitors? Below, we examine key points comparing Della with MrCool, Pioneer, and Senville, which are leading mini split brands.

Della vs. MrCool

Installation Method: MrCool is renowned for its DIY installation method—their DIY line comes pre-charged with quick-connect fittings, enabling homeowners to assemble without a vacuum pump or professional tools. This appeals to those uncomfortable with technical HVAC tasks.

Della, by contrast, uses conventional installation requiring flaring lines and vacuuming, typically needing professional equipment or expertise. Therefore, if hands-off DIY is a priority, MrCool is a better choice.

Price: Despite its DIY features, MrCool units are significantly more expensive. A 1-ton (12k BTU) MrCool DIY kit may cost over $1,200, whereas a comparable Della 12k usually costs about half. Della saves considerable money for budget consumers willing to perform some installation work.

One reviewer noted Della as a great value compared to the overpriced MrCool systems. When labor costs for HVAC pros are factored in, Della generally remains more affordable.

Performance & Features: Both brands use inverter technology delivering efficient cooling and heating. New MrCool models are rated near 20-22 SEER, comparable to Della’s real-world efficiency. Both feature quiet indoor units and moderate outdoor noise levels.

MrCool includes built-in Wi-Fi smart control and Alexa/Google Assistant compatibility, similar to Della’s Wi-Fi models. Functionally, MrCool and Della operate similarly—efficient and quiet—the key differentiation lies in installation ease and brand support. MrCool’s advantage is polished DIY installation, while Della emphasizes strong value.

Support & Warranty: MrCool offers a standard 5-year parts and 7-year compressor warranty on DIY models, with some compressor warranties upgradeable to limited lifetime upon registration. Della provides 5/10-year warranties and lifetime parts warranties for registered 2024+ purchases.

Della’s warranties are equally strong or stronger on paper, but MrCool benefits from a more developed U.S. customer service network, easing warranty claims. Customers seeking U.S.-based support may prefer MrCool. Yet, many handy homeowners succeed with MrCool DIY installs, though warranty and parts replacement remain DIY challenges.

Ultimately, the choice between MrCool and Della centers on whether additional cost for streamlined DIY installation is worth it. Otherwise, Della offers a competitively priced alternative functioning similarly after proper installation.

Della vs. Pioneer

Brand Background: Pioneer is a longstanding budget mini split brand in the U.S., manufactured by Parker Davis HVAC for over a decade. It benefits from brand recognition, established reliability, and stateside inventory and support—including a warehouse in Florida ensuring faster shipping.

Della is a newer entrant without the same market presence or long-term track record, though early reliability signals are positive.

Cost & Efficiency: Della and Pioneer target the low-end market, often pricing similarly. The Pioneer 12k BTU mini split typically costs $750-900, slightly higher than Della.

Pioneer’s Diamante series rates SEER at about 20-23, somewhat higher than Della’s ~17-20 SEER offerings, though Della has introduced new models rated near 21 SEER2. Practically, Pioneer and Della perform similarly within the same capacity classes, both much more efficient than older units.

Features: Della has recently added Wi-Fi control, whereas many Pioneer units previously lacked it or offered it as an optional USB adapter. Pioneer units use simple remotes and modes similar to Della’s.

Pioneer offers a broader product range including ceiling cassette and floor-ceiling indoor units and multi-zone packages. Della focuses on wall-mounted splits. Both brands’ indoor units share a standard white-box design, with little differentiation unless design aesthetics are a priority.

Warranty & Support: Pioneer provides up to 5 years limited warranty (parts and compressor) with professional installation registration, which is needed for coverage. Customers can contact a U.S. support number and access certified technicians in some regions.

Della’s customer service is reportedly slower or less direct. Hence, for after-sale service and peace of mind, Pioneer may be preferable. However, many DIY users find both brands comparable in ease of installation and value, sometimes treating units as semi-disposable over 10 years.

In summary, Pioneer is the older, more recognized budget leader, while Della is a promising newcomer offering similar features at lower prices. Choices may hinge on experience, cost at purchase, or service reliability.

Della vs. Senville

Market Position: Senville, a Canadian brand, positions slightly above budget level. Their prices remain competitive but generally higher than Della’s, yet lower than Pioneer’s or some premium brands.

Senville emphasizes build quality and cold-climate performance, such as in their Aura series. Their budget Leto series matches Della’s specs, while Aura and higher-end lines offer features like hyper-heating down to 22°F and Energy Star certification. Della has recently introduced hyper-heat models but Senville has longer experience in this niche.

Efficiency and Performance: Senville units generally achieve higher SEER ratings (21-25 in Aura series) slightly surpassing most Della models. Both brands provide efficient, quiet operation, though Senville premium models can reach indoor noise levels as low as 19 dB on quiet mode. Della units are also quiet (mid-20s dB low fan), generally unnoticeable.

Senville models tend to maintain heating at lower outdoor temperatures, facilitated by features like base pan heaters. This makes Senville a safer choice for extremely cold climates, while Della suits moderate winters well.

Features & Options: Both brands offer Wi-Fi connectivity and smart controls on most models. Senville supports multi-zone systems up to 4 or 5 zones and offers higher capacity units (36k+ BTU) for whole-house cooling.

Della also provides multi-zone options, such as 27k BTU 3-zone systems, but Senville’s lineup is more extensive. Senville’s indoor units, especially Aura series, have more premium designs including sleek hidden displays and robust construction. Both have multi-speed fans, similar mode options, and installation kits. Senville is credited for superior installation instructions, vacuum port adapters, and technician-friendly features.

Warranty & Support: Senville offers a 7-year compressor and 2-year parts warranty on base models, extending to 10-year compressor and 5-year parts coverage on registered Aura models. They notably provide free technical support for 10 years to assist with troubleshooting and installation, indicating strong customer service.Customers frequently report positive experiences with Senville’s support and warranty claim handling, provided installation meets requirements. Della’s warranty, while