6 Best 4-Zone Mini-Split Air Conditioners of 2026
We compared six four-zone ductless mini split heat pumps on head sizes, coverage, efficiency, cold-weather heating and warranty.
By Daniel Brooks
Updated October 20, 2026
A four-zone mini split connects four indoor heads to one outdoor condenser and can cover most of a small or mid-size house: three bedrooms and a living room, or a full upstairs. It is a common way to add central-style air to a home with no ducts. Our list of the best 4-zone mini-split air conditioners compares six quad-zone systems on head sizes, coverage, efficiency, cold-weather heating and warranty. To browse every model we cover, visit our Multi-Zone Mini-Split Air Conditioners page.
Four-zone kits vary from four equal 9,000 BTU heads to mixed layouts with larger heads for living areas, so plan each room before you compare.
All Products Compared
| Product | Best For | Zones | Capacity | Efficiency | Heating |
|---|---|---|---|---|---|
| TOSOT Cosmo 36,000 BTU 4 Zone Mini Split | Overall | 4 (9,000 BTU each) | 36,000 BTU | 21 SEER2, 10 HSPF2 | -22F to 118F range |
| Della 35K BTU 4 Zone Mini Split AC | Mixed rooms | 4 (9,000 x 2 + 12,000 x 2 BTU) | 35,000 BTU | 19 SEER2 | -13F listed |
| TURBRO Greenland 36,000 BTU 4 Zone Mini Split | Value | 4 (9K x 3 + 12K) | 36,000 BTU | 22.5 SEER2 | Down to -13F |
| ROVSUN 38,000 BTU Quad Zone WiFi Mini Split | App control | 4 (9K x 3 + 12K) | 38,000 BTU | 20 SEER2 | -4F to 122F range |
| Pioneer Quantum Ultra 36,000 BTU Quad Zone Mini Split | Cold climates | 4 (9,000 BTU each) | 36,000 BTU (3-Ton) | 22.5 SEER2, 12.0 EER2 | High heat at -13F |
| Daikin 36,000 BTU 4-Zone Mini Split | Premium brand | 4 (9K BTU each) | 36,000 BTU | 20 SEER2, 9.5 HSPF2 | 5F to 59.9F heating |
| Award | Product | WikiCooling Score About WikiCooling ScoreThe WikiCooling Score is our own rating from 0 to 10, based on the criteria described on our How We Review page. It reflects research, not laboratory measurement, and is never influenced by manufacturers, retailers, or affiliate commissions. Learn more › | |
|---|---|---|---|
TOSOT Cosmo 36,000 BTU 4 Zone Mini Split
|
8.6/10 | Buy | |
| Best Value |
Della 35K BTU 4 Zone Mini Split AC
|
8.8/10 | Buy |
| Best Overall |
TURBRO Greenland 36,000 BTU 4 Zone Mini Split
|
9.4/10 | Buy |
| Best Budget |
ROVSUN 38,000 BTU Quad Zone WiFi Mini Split
|
7.0/10 | Buy |
| Best Premium |
Pioneer Quantum Ultra 36,000 BTU Quad Zone Mini
|
Buy | |
Daikin 36,000 BTU 4-Zone Mini Split
|
Buy |
TOSOT Cosmo 36,000 BTU 4 Zone Mini Split
Individual Temp. Control: Manage temperatures in four spaces using one 36,000 BTU outdoor unit with four 9,000 BTU indoor units; customize temperatures from 61-86℉ and select different modes for each room to meet varying needs Cost Saving: With a rating of 21 SEER2 and 10 HSPF2, the TOSOT Cosmo series multizone system saves up to 24% on energy costs compared to conventional units rated at 16 SEER2; Energy Star-certified and eligible for federal tax rebate Extreme Weather Resilience: Features an advanced compressor; operates in ambient temperatures from -22℉ to 118℉; performs well year-round in hot states like Arizona or cold regions like Michigan; intelligent defrost function enhances heating efficiency
Della 35K BTU 4 Zone Mini Split AC
[ENERGY EFFICIENT COOLING] Della 4 Zone 35000 BTU/h, 19 SEER2, 208-230V, ETL Listed, AHRI Certified pre-charged air conditioner unit features a mini split inverter plus system with a heat pump (up to -13℉/-25℃) and DC Inverter technology provides up to 30% power savings. (This model does not support the Self-Cleaning Function. The option will still show on the display after pressing the self-cleaning button, the self-cleaning operation will not be performed.) [MULTIPLE ROOMS] Comes with 4 indoor air handlers 9000 BTU + 9000 BTU + 12000 BTU + 12000 BTU with separate controller for individual rooms and 1 outdoor condenser. Enjoy individual temperature controls in each room for ideal climate control. Maximum Fuse Size is 35A. 4 pcs 16ft copper pipes lineset (Standard size 1/4" & 3/8" outer dimension), 4 pcs 6.56ft outlet drain pipe (inner/outer diameter size: 15.5mm/16.9mm) and 4 installation kits included. [AMPLE COVERAGE] This unit provides cooling and heating for up to 1900 Sq. Ft (2 indoor unit recommended area 400 Sq. Ft,2 indoor unit recommended area 550 Sq. Ft) and able to work in environments as low as 5 degrees Fahrenheit. Full installation kit included. It Works with Alexa.
TURBRO Greenland 36,000 BTU 4 Zone Mini Split
Kindly Note: Every set may arrive in up to 9 separate boxes and may be delivered at Different Times.Please ensure All Packages have arrived before scheduling installation. Powerful Heating and Cooling: The TURBRO Greenland mini split uses advanced inverter technology for efficient operation at temperatures as high as 131°F during cooling and as low as -13°F during heating. Achieve rapid cooling in 30 seconds and efficient heating in 60 seconds. Lower Electricity Bill: The TURBRO Greenland mini split AC has a SEER2 rating (DOE New Efficiency Standard of 2023) of 22.5, a measure of energy efficiency. This high rating means the unit can cool your home using less energy, resulting in an estimated cooling season electricity bill of just $215.84. Additionally, the high SEER2 rating means that the unit qualifies for federal tax credits, which could further reduce your tax bill.
ROVSUN 38,000 BTU Quad Zone WiFi Mini Split
All-in-one for Multiple Rooms: Equipped with 1 outdoor 38,000BTU condenser and 4 indoor (9,000BTU + 9,000BTU + 9,000BTU + 12,000BTU) air handlers with individual controllers for each room. Our mini split air conditioning and heating system offers an all-season solution with air conditioning, powerful heat pump, dehumidifier, fan, and speed-up turbo function. Each room has individual temperature control for ideal climate control Powerful Cooling and Heating: This ductless air conditioner comes with an inverter and heat pump system (up to -4℉~122℉ Ambicient temperature) for use in a variety of environments, this mini split air conditioner offers amazing performance without compromising on aesthetics. Auto defrost, self-diagnosis/cleaning, iFEEL mode, 24-hour timer, 4-way air swing, sleep mode, silent mode, etc. Advanced Energy-saving Air Conditioning Unit: The split air conditioner is equipped with innovative inverter technology at 20 SEER grade ensures optimal performance with 30% energy savings in every season; And it is ETL and AHRI certified, guaranteeing reliability of electrical bill saving. Perfect for home & business use like bedroom, living room, kitchen, rv, commercial spaces like stores, eateries, garage & warehouses
Pioneer Quantum Ultra 36,000 BTU Quad Zone Mini
Pioneer brand multi split heat pump system, complete set. System components include: 1 multi zone outdoor unit, matching multiple wall mount indoor units, piping and accessory kits and remote controllers. Pioneer Quantum Ultra multi split systems are available in 5 versions; for 2, 3, 4, and 5 zones.
Daikin 36,000 BTU 4-Zone Mini Split
Daikin, a global leader in HVAC innovation for over 90 years, offers some of the most advanced and aesthetically designed air conditioning and heating systems on the market. The Daikin Multi-Split Heat Pump Air Conditioner features the 4MXM-A Series R32 pre-charged outdoor condenser and (4) FTXV Series wall-mounted indoor fan coils, delivering exceptional energy efficiency with a 20 SEER2 rating, making it ideal for multi-zone applications. This Wi-Fi-enabled system works exclusively with the Daikin One Home app, allowing for convenient remote control and monitoring. It offers multiple modes such as Auto, Cool, Dry, Heat, and Fan Only, along with timer settings and adjustable airflow for personalized comfort. The eco-friendly R32 refrigerant reduces power consumption and minimizes environmental impact, while ECONO Operation, Powerful Operation Mode, and quiet operation ensure optimal efficiency and comfort. The package includes all necessary components for installation, Maxwell installation kit, communication cables, and an outdoor wall bracket, ensuring a hassle-free setup. 12-Year warranty is included, must be installed by an HVAC-certified technician.
Top 3 4-Zone Mini-Split Air Conditioners Reviewed
#1 TOSOT Cosmo 36,000 BTU 4 Zone Mini Split: Best Overall
Why We Picked It
The TOSOT Cosmo 36,000 BTU 4 Zone is our top quad-zone system. It is ENERGY STAR certified with 21 SEER2 and 10 HSPF2, works down to -22F and comes from the Gree family of brands, with a 4.5 average from 9 ratings.
TOSOT’s Cosmo four-zone kit runs four 9,000 BTU indoor units from one 36,000 BTU outdoor unit, with each room set to its own mode and temperature from 61 to 86F. It is rated 21 SEER2 and 10 HSPF2 with ENERGY STAR certification and is eligible for federal tax rebates. The compressor works in ambient temperatures from -22F to 118F, and intelligent defrost keeps heating efficient in cold weather. The Gree+ app and voice control are supported, a 16.4-foot copper pipe set is included, and it has a 4.5 average from 9 ratings.
Key Specifications
- Total Capacity: 36,000 BTU
- Indoor Units: 4 x 9,000 BTU
- Efficiency: 21 SEER2, 10 HSPF2
- Operating Range: -22F to 118F
- Controls: Gree+ app, voice
- Certification: ENERGY STAR
| Pros | Cons |
|---|---|
|
|
Things to Consider
All four heads are 9000 BTU class, so a large living room may need more. The power cord is not included, and TOSOT recommends a professional install.
Best For
This system is best for four bedrooms or offices in a cold climate.
Check the current price and availability of the TOSOT Cosmo 36,000 BTU 4 Zone Mini Split on Amazon.
#2 Della 35K BTU 4 Zone Mini Split AC: Best for Mixed Room Sizes
Why We Picked It
Della’s 35K BTU 4 Zone has the best ratings record among four-zone kits, a 4.6 average from 16 ratings, and its two 9000 BTU plus two 12000 BTU heads fit a typical mix of bedrooms and living space up to 1900 Sq. Ft.
Della’s four-zone kit drives two 9000 BTU heads and two 12000 BTU heads from a 35000 BTU/h condenser, each with a separate controller. It covers up to 1900 Sq. Ft, with two heads recommended for 400 Sq. Ft rooms and two for 550 Sq. Ft rooms, and it works with Alexa and Wi-Fi. Efficiency is 19 SEER2, the system is ETL listed and AHRI certified, and four 16ft copper line sets, four drain pipes and four installation kits are in the box. The indoor units are rated at 28 dB, and it has a 4.6 average from 16 ratings.
Key Specifications
- Total Capacity: 35000 BTU/h
- Indoor Units: 9000 x 2 + 12000 x 2 BTU
- Efficiency: 19 SEER2
- Coverage: Up to 1900 sq ft
- Noise Level: 28 dB
- Line Sets: Four 16ft kits
| Pros | Cons |
|---|---|
|
|
Things to Consider
Efficiency trails the newer four-zone systems, and the listing gives both -13F and 5 degrees Fahrenheit as low limits. The maximum fuse size is 35A.
Best For
This system is best for a four-room home that wants a proven four-zone kit.
Check the current price and availability of the Della 35K BTU 4 Zone Mini Split AC on Amazon.
#3 TURBRO Greenland 36,000 BTU 4 Zone Mini Split: Best Value
Why We Picked It
TURBRO’s Greenland 36,000 BTU 4 Zone is the lowest-priced system in this guide, yet it still offers 22.5 SEER2, heating down to -13F and a five-year limited warranty.
TURBRO’s Greenland four-zone system runs three 9K heads and one 12K head from a 36,000 BTU outdoor unit rated 22.5 SEER2, and it is priced well below most four-zone kits. The inverter heat pump keeps heating down to -13F and cools at outdoor temperatures up to 131F, with cooling in about 30 seconds and heating in about 60 seconds. App and remote control are included, R454B is the refrigerant, and the warranty is listed as 5 years limited. It has a 5.0 average from 1 rating.
Key Specifications
- Total Capacity: 36,000 BTU
- Indoor Units: 9K x 3 + 12K
- Efficiency: 22.5 SEER2
- Heating: Down to -13F
- Cooling: Up to 131F outdoors
- Warranty: 5 years limited
| Pros | Cons |
|---|---|
|
|
Things to Consider
Each set may arrive in up to 9 separate boxes on different days. Wait until all of them arrive before you schedule the installer.
Best For
This system is best for four rooms on a budget in a mixed or cold climate.
Check the current price and availability of the TURBRO Greenland 36,000 BTU 4 Zone Mini Split on Amazon.
Other Models Worth Considering
ROVSUN 38,000 BTU Quad Zone WiFi Mini Split. Three 9,000BTU heads plus one 12,000BTU head on a 38,000BTU condenser, 20 SEER2, WiFi app and voice control, and a -4F to 122F range. It has a 3.5 average from 11 ratings.
Pioneer Quantum Ultra 36,000 BTU Quad Zone Mini Split. Four 9,000 BTU heads on a 3-Ton Quantum Ultra condenser, 22.5 SEER2, 36,000 BTU nominal heating and high-capacity heat at -13F.
Daikin 36,000 BTU 4-Zone Mini Split. Four 9K BTU heads on a Daikin 4MXM36 condenser, 20 SEER2, 22 dB indoor sound and a 12-year warranty.
What to Expect from 4-Zone Mini-Split Air Conditioners
A quad-zone system runs four heads from one inverter outdoor unit. Each room has its own control, and the compressor slows down when only one or two zones call. Expect four wall penetrations, four line sets, a large outdoor pad and a dedicated 230 volt circuit.
Installation labor is a big share of the cost for four zones, so get a quote before you choose equipment.
For more options, see our guides to 3-ton multi-zone mini-split systems and multi-zone mini-splits for whole house. The product cards show the current price for each system.
How to Choose a 4-Zone Mini-Split Air Conditioner
Size Each Indoor Unit to Its Room
ENERGY STAR publishes this general guide for sizing a room air conditioner by floor area. Use it for each room, then pick the indoor head closest to that room’s need:
| Room Size (sq ft) | Cooling Capacity (BTU/hr) |
|---|---|
| 100 to 150 | 5,000 |
| 150 to 250 | 6,000 |
| 250 to 300 | 7,000 |
| 300 to 350 | 8,000 |
| 350 to 400 | 9,000 |
| 400 to 450 | 10,000 |
| 450 to 550 | 12,000 |
| 550 to 700 | 14,000 |
| 700 to 1,000 | 18,000 |
Reduce capacity by 10 percent for a heavily shaded room, increase it by 10 percent for a very sunny room, add 600 BTU for each regular occupant beyond two, and add 4,000 BTU if the unit cools a kitchen. Source: ENERGY STAR.
Avoid Four Identical Heads for Mixed Rooms
Four 9,000 BTU heads suit four bedrooms. If one zone is an open living room, choose a kit with one or two 12,000 BTU heads, like the Della 35K BTU 4 Zone.
Match the Heat Pump to Your Winters
Check the lowest outdoor temperature each system is rated to heat at. Standard models stop around -4F or 5F, while cold-climate systems keep running to -13F or even -22F. If the mini split will be your main heat source in a northern state, pay for the better rating.
Plan for Professional Installation
Almost every multi-zone system needs a licensed technician to mount the heads, run each line set, pull a vacuum and open the valves, and several brands tie the warranty to a professional install. Get an installation quote before you buy, because labor for several zones can rival the price of the equipment.
Confirm the Electrical Circuit
Multi-zone condensers run on 208 to 230 volts and need a dedicated circuit and breaker sized to the listing’s fuse rating. Ask an electrician to check your panel before the equipment arrives.
How We Evaluate 4-Zone Mini-Split Air Conditioners
We rank multi-zone mini splits on manufacturer specifications, listing details and aggregated buyer ratings. For this list we kept only complete systems sold with one outdoor condenser and all indoor heads, and excluded bundles of separate single-zone units, condenser-only and indoor-only listings, open-box units and listings with too little data. We weighed track record, efficiency, heating range and how well the head sizes match real rooms first, then compared noise, controls, included line sets, installation needs and warranty.
Frequently Asked Questions
How big a house can a four-zone mini split cover?
Della lists its 35K BTU four-zone kit for up to 1900 Sq. Ft, which covers many small and mid-size homes.
Which four-zone system handles cold winters best?
The TOSOT Cosmo four-zone kit is listed down to -22F, and the Pioneer Quantum Ultra heats at high capacity at -13F.
Can I add a fifth zone later?
Only if the outdoor unit supports five heads. Most four-zone condensers do not.
Which has the longest warranty?
Daikin lists a 12-year manufacturer warranty on its four-zone system.
Final Verdict
The TOSOT Cosmo 36,000 BTU 4 Zone Mini Split is the best 4-zone mini-split air conditioner for most homes, with ENERGY STAR efficiency and an operating range down to -22F. For rooms of different sizes, choose the Della 35K BTU 4 Zone Mini Split AC. For the best value, the TURBRO Greenland 36,000 BTU 4 Zone Mini Split is the pick.
About the author
Daniel Brooks is a home cooling editor at WikiCooling, covering window, portable, through-the-wall and mini-split air conditioners, fans, and dehumidifiers. He researches cooling capacity, energy efficiency, noise levels, installation requirements, and buyer feedback to help homeowners choose the right unit for their room size, climate, and budget.