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| PRODUCT DESCRIPTION
MRCOOL® DIY® 5th Gen 18,000 BTU 23.9 SEER2 Dual-Zone Ductless Mini Split Heat Pump System – 6K + 6K- Wall mount Air Handlers 16ft + 16ft Pre Charged line sets DIYM218HPW00D00
Experience year-round comfort and big installation savings with the MRCOOL® DIY® 5th Generation Multi-Zone 18,000 BTU 1.5 Ton 23.9 SEER2 Ductless Heat Pump System. This dual-zone package includes two 6,000 BTU wall air handlers, each ideal for rooms up to ~200 sq. ft., powered by the reliable 18,000 BTU 1.5 Ton outdoor condenser. Two 16ft DIY® Quick Pre-Charged Line sets. Perfect for bedrooms, offices, or smaller living areas, this system delivers quiet, efficient heating and cooling in two separate zones. (Smart Phone not included)
Why Choose MRCOOL DIY?
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True DIY Installation – No special tools, training, or HVAC license required. The included pre-charged Quick Connect® line sets come filled with eco-friendly R-454B refrigerant, making installation fast and hassle-free.
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Save Thousands on Installation – Skip the high labor costs of traditional systems by doing it yourself with easy step-by-step video instructions.
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Year-Round Comfort – This heat pump design provides cooling in summer, heating in winter, and dehumidification during wet seasons.
Advanced Features
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23.9 SEER2 Efficiency – Energy-saving inverter technology keeps comfort high and utility bills low.
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Smart Controls – Operate your system with the MRCOOL Smart Controller app, Amazon Alexa, or Google Home. Each air handler also comes with a wireless remote.
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Gold Fin® Condenser – Built for long-lasting durability, corrosion resistance, and reliable performance.
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Follow Me® Function – Sensors in the remote adjust the temperature based on where you are in the room.
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Low Ambient Cooling – Keeps working even in cold outdoor conditions.
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Alerts & Self-Diagnostics – Easy-to-read digital display shows error codes, filter reminders, and refrigerant alerts for simple maintenance.
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Quiet Comfort – Sleep mode saves energy overnight, while mute mode eliminates lights and alerts for undisturbed rest.
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Auto Restart – System remembers your last settings and resumes automatically after a power outage.
Air Handler Compatibility
This condenser supports up to three indoor air handlers with a maximum combined capacity of 24,000 BTU. Available air handler sizes: 6K, 9K, and 12K BTU.
Examples of Compatible Combinations:
- 6K + 6K + 12K (24,000 BTU)
- 6K + 9K + 9K (24,000 BTU)
- 6K + 6K + 9K (21,000 BTU)
- 6K + 9K + 6K (21,000 BTU)
- 9K + 9K (18,000 BTU – one port unused)
- 6K + 12K (18,000 BTU – one port unused)
Recommended Wire Sizing
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Recommended: 12 AWG copper wire – safe for 18A minimum circuit ampacity
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One Size Smaller (14 AWG): Not recommended – may overheat under full load and violate electrical code
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One Size Larger (10 AWG): Offers lower voltage drop and extra safety margin
Warranty & Support
Your investment is protected with a 7-Year Compressor Warranty (with optional Lifetime Compressor Warranty upgrade), 5-Year Parts Warranty, and lifetime technical support from MRCOOL® . Limited Lifetime Replacement Warranty with registration in the MRCOOL® Care Program
Key Specs
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System Capacity: 18,000 BTU
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Air Handlers Included: 2 × 6,000 BTU
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Efficiency: 23.9 SEER2
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Refrigerant: R-454B, pre-charged Quick Connect® line sets
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Coverage: ~200 sq. ft. per air handler (400 sq. ft. total)
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Power: 208/230V
Perfect For:
✔ Two small bedrooms
✔ Home office + guest room
✔ Studio or small apartment zones
The MRCOOL® DIY 5th Gen Multi-Zone 18k Dual Zone Mini Split (6K + 6K) is the easiest, most cost-effective way to enjoy professional-grade HVAC comfort without professional installation costs.
Specification Below
DIY-MULTI3-18HP230D-O
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BRAND NAME
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MRCOOL
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SERIES
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DIY 5th gen Multi-Zone Mini-splits
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MODEL
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DIY-MULTI3-18HP230D-O
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GTIN
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00840255587617
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UPC
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840255587617
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SHORT DESCRIPTION
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MRCOOL® 18k DIY 5th Generation 3 Zone Multi-Zone Mini-Split Condenser 230v
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LONG DESCRIPTION
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We are thrilled to announce our new 5th Generation MRCOOL® DIY® 18k BTU Multi-Zone Ductless Mini Split Condenser, which is the best and most convenient way to get comfortable. You won’t need the services of an HVAC professional to install this unit, because it’s do-it-yourself! Achieving a SEER2 rating of 23.9 and an HSPF2-4 rating of 10, you can rest easy knowing this unit will help you save money as you chill. This condenser can also support up to three air handlers, meaning it can heat and cool three rooms that are a combined 750 square feet in size, making it a perfect option if you have spare bedrooms in need of heating and cooling. What makes this system different is our patented pre-charged Quick Connect® line sets filled with R-454B, an incredibly efficient and eco-friendly refrigerant. This switch from the previous refrigerant makes the system even more efficient and sustainable than before. The design of these innovative line sets allow you to install the system yourself, saving you time and money. These line sets are sold separately. This condenser is more than just a heating and cooling unit. When operating as a system, you will be able to experience total customization with the unit’s wealth of features. For example, you can integrate your system with Amazon Alexa or Google Home through the Smart HVAC app, allowing you to control your system with your voice and monitor its operation with the touch of a button. You can also set schedules, temperature ranges, and mode of operation through the app. The power of comfort is in your hands with this system. In the unlikely event that something happens to the system, we’ve got you covered. The DIY® series comes with one of the best warranties in the industry - a 7 year compressor warranty, a 5 year parts warranty, and a Limited Lifetime Replacement warranty with enrollment in the MRCOOL® Care Program. Give yourself the best comfort with the DIY®.
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FEATURE LIST
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- Intertek listed 5031495
- Easy DIY installation
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- Future-proof your investment with the included DIYPro® cable, eliminating the need for electrical conduit.
- Keep the included remote close by, and MRCOOL DIY®'s Follow Me® function will track the air temperature around you to ensure maximum comfort.
- The MRCOOL® Smart HVAC Controller® Module and App fully support Google Assistant & Amazon Alexa out of the box.
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SEER2
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23.9
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EER2
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13
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HSPF2-4
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10
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HSPF2-5
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7.8
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TONNAGE
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1.5
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COOLING CAPACITY (BTU)
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18000
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HEATING CAPACITY (BTU)
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18000
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VOLTAGE (V)
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208/230
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PHASE
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1
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CYCLE
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60
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MAX FUSE BREAKER (A)
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20
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MIN CIRCUIT AMPACITY (A)
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16
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COLOR
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White
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ZONE CAPACITY
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3
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REFRIGERANT TYPE
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R-454B
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REFRIGERANT VOLUME (OZ)
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61.73
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DECIBEL RATING (DBA)
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60
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INVERTER
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DC
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LINE SET LENGTH
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25
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MAX LINESET LENGTH (FT)
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172.2
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LIQUID LINE SIZE
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1/4
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SUCTION LINE SIZE
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3/8
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COMPRESSOR MOTOR TYPE
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Rotary
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AUXILIARY HEATER INCLUDED
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No
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AUXILIARY HEATER AVAILABLE
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No
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FAN ONLY OPTION
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Yes
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QUIET MODE
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Yes
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AUTO COOL
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Yes
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WIFI COMPATIBILITY
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Yes
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APP COMPATIBILITY
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Yes
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WORKS WITH IOS
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Yes
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WORKS WITH ANDROID
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Yes
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UL LISTED
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Yes
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ETL LISTED
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Yes
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ENERGY STAR CERTIFIED
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Yes
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AHRI CERTIFIED
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Yes
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REGISTERED WARRANTY
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Extended Limited Lifetime*
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BASE PARTS WARRANTY
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5
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BASE COMPRESSOR WARRANTY
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7
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HAS BATTERIES
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Yes
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CONTAINS ELECTRONICS
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Yes
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CONTAINS CHEMICALS
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Yes
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CONTAINS AEROSOL
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Yes
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CONTAINS COMPRESSED GAS
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Yes
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PROPOSITION 65 WARNING
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Yes
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NET DEPTH (IN)
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13.46
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NET HEIGHT (IN)
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26.5
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NET WIDTH (IN)
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35.04
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NET WEIGHT (LBS)
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101.63
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GROSS DEPTH (IN)
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17.24
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GROSS HEIGHT (IN)
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29.53
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GROSS WIDTH (IN)
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40.55
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GROSS WEIGHT (LBS)
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109.57
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BRAND NAME
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MRCOOL
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SERIES
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DIY 5th gen Multi-Zone Mini-splits
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MODEL
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DIY-06-HP-WMAH-230D25-O
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GTIN
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00840255587013
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UPC
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840255587013
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SHORT DESCRIPTION
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MRCOOL® 6k DIY 5th Generation Mini-Split Air Handler 230v
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LONG DESCRIPTION
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Check out the new 5th Generation MRCOOL® DIY® 6K BTU Ductless Heat Pump Mini-Split Air Handler! Designed for an easy and hassle-free installation, this system requires no special tools or prior experience and effectively heats or cools spaces up to 200 sq. ft. The pre-charged 25-foot DIY® QuickConnect® line set, which is pre-charged with R-454B refrigerant, eliminates the need for vacuuming, making installation faster, easier, and more cost-effective. This line set is sold separately. The included DIYPRO® cable removes the need for electrical conduit, offering added durability against the outdoor elements and wildlife. Control is effortless with multiple options, including the wireless remote, the SmartHVAC app for Apple and Android devices, and hands-free voice commands via Amazon Alexa and Google Assistant. The Gold Fin® Condenser provides superior corrosion resistance for coastal homes, ensuring long-lasting performance in harsh conditions. Designed for both comfort and efficiency, the system's wireless remote features the innovative Follow Me function, which allows the air handler to adjust airflow temperature based on the remote's location, maintaining consistent comfort throughout the room. Additionally, Dry Mode helps reduce humidity by acting as a dehumidifier, removing excess condensation. Backed by an industry-leading warranty—including a limited lifetime warranty, a 7-year compressor warranty, and a 5-year parts warranty—the 5th Generation MRCOOL® DIY® 6K BTU Ductless Heat Pump Mini-Split Air Handler is built for lasting reliability. Enjoy advanced technology, simple installation, and year-round comfort with confidence.
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FEATURE LIST
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- Intertek listed 5031495
- Easy DIY installation
-
- Future-proof your investment with the included DIYPro® cable, eliminating the need for electrical conduit.
- Keep the included remote close by, and MRCOOL DIY®'s Follow Me® function will track the air temperature around you to ensure maximum comfort.
- The MRCOOL® Smart HVAC Controller® Module and App fully support Google Assistant & Amazon Alexa out of the box.
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VOLTAGE (V)
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208/230
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PHASE
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1
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CYCLE
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60
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MOUNT TYPE
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Wall
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COLOR
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White
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MAX COVERAGE AREA
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200 sqft
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OSCILLATION
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Yes
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FILTER TYPE
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Reusable
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AUXILIARY HEATER INCLUDED
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No
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AUXILIARY HEATER AVAILABLE
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No
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FAN ONLY OPTION
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Yes
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QUIET MODE
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Yes
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AUTO COOL
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Yes
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WIFI COMPATIBILITY
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Yes
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APP COMPATIBILITY
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Yes
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WORKS WITH IOS
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Yes
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WORKS WITH ANDROID
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Yes
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REMOTE CONTROL INCLUDED
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Yes
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UL LISTED
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Yes
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ETL LISTED
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Yes
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AHRI CERTIFIED
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Yes
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REGISTERED WARRANTY
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Extended Limited Lifetime*
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BASE PARTS WARRANTY
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5
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BASE COMPRESSOR WARRANTY
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7
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HAS BATTERIES
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Yes
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CONTAINS ELECTRONICS
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Yes
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CONTAINS CHEMICALS
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Yes
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CONTAINS AEROSOL
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Yes
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CONTAINS COMPRESSED GAS
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Yes
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PROPOSITION 65 WARNING
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Yes
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NET DEPTH (IN)
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7.44
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NET HEIGHT (IN)
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11.69
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NET WIDTH (IN)
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31.57
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NET WEIGHT (LBS)
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24.47
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GROSS DEPTH (IN)
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16.34
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GROSS HEIGHT (IN)
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14.37
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GROSS WIDTH (IN)
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36.02
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GROSS WEIGHT (LBS)
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35.05
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What's the difference between the 5th Gen and 4th Gen?
The 5th Gen MRCOOL DIY® Mini Split offers several key upgrades over the 4th Gen, focusing on efficiency, advanced technology, and eco-friendliness.
Here’s what’s new with the 5th Gen:
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Next-Gen R-454B Refrigerant: A more environmentally friendly refrigerant with lower global warming potential (GWP), compliant with the latest HVAC regulations.
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Higher Energy Efficiency: Improved SEER2 ratings for greater energy savings and optimized performance.
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Enhanced System Reliability: Upgraded components for better heating and cooling performance.
Can I install it myself, or do I need a professional?
The MRCOOL DIY system is designed for homeowners and doesn’t require HVAC tools. You can install the indoor and outdoor units yourself using the pre-charged Quick Connect® lines. However, a licensed electrician is required for the electrical hookup to ensure safety and code compliance.
Does it work in cold weather?
Yes. MRCOOL 5th Gen systems feature low-ambient heating and can provide reliable heat even when outdoor temperatures drop to around 5°F.
How do I know what BTU size I need for my rooms?
A general rule of thumb is 20 BTU per square foot of space. Here's a rough guide:
- 6,000 BTU = 100 - 200sq ft
- 9,000 BTU = 150 - 400sq ft
- 12,000 BTU = 351- 550 sq ft
- 18,000 BTU = 501 – 800 sq ft
- 24,000 BTU = 751 – 1,050 sq ft
- 36,000 BTU = 1,001 - 1,550 sq ft
Some additional factors may impact performance such as insulation, ceiling height, sun exposure and the number of appliances in the room. For assistance, contact our Product Experts.
Does it heat as well as cool?
Yes. All 5th Gen models are heat pumps, providing both heating and cooling for year-round comfort.
Is it Wi-Fi compatible?
Yes. The MRCOOL SmartHVAC app allows smartphone control and works with Amazon Alexa and Google Assistant.
What is the warranty?
The MRCOOL 5th Generation DIY Mini-Split systems offer the following warranty coverage:
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7-Year Compressor Replacement Warranty: This warranty ensures that if the compressor fails within the first seven years, MRCOOL will provide a replacement.
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5-Year Parts Warranty: This warranty covers all parts of the system for five years from the date of purchase.
- Limited Lifetime Compressor Warranty (online registration required)
🥇 Order today from MRCOOL Direct and enjoy saving money, free shipping, nationwide delivery, home of the extended offer of Refrigerant, parts, Labor warranty and expert support! #1 Most Trusted MRCOOL Authorized Dealer.
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| Regular price
$2,923.00
Sale price
$2,923.00
Regular price
$3,594.99
| MRCOOL® | 18k | |
