MRCOOL DIY 5th Gen 4-Zone 42,000 BTU Ductless Mini Split Air Conditioner & Heat Pump (6K+6K+6K+24K), DIY4-B-55HP06060624

MRCOOL DIY 5th Gen 4-Zone 42,000 BTU Ductless Mini Split Air Conditioner & Heat Pump (6K+6K+6K+24K), DIY4-B-55HP06060624 No Vac Quick connect

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MRCOOL DIY 5th Gen 4-Zone 42,000 BTU Ductless Mini Split Air Conditioner & Heat Pump (6K+6K+6K+24K), DIY4-B-55HP06060624

Name: MRCOOL DIY 5th Gen 4-Zone 42,000 BTU Ductless Mini Split Air Conditioner & Heat Pump (6K+6K+6K+24K), DIY4-B-55HP06060624
Brand: MRCOOL
SKU: DIY4-B-55HP06060624
Price: 7985.00 USD
Availability: InStock

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SKU: DIY4-B-55HP06060624

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Estimated delivery: 2–13 business days Order before 2:00 PM ET. Handling takes 1–3 business days and transit 1–10 business days. Tracking is emailed when it ships.

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42,000 BTU Connected Capacity • Compact Plus Graduated Zoning • 6-Zone Capable Condenser

MRCOOL® DIY® 5th Gen 4-Zone Wall Mount Mini Split (6K+6K+6K+24K)

The MRCOOL® DIY® 5th Generation 42,000 BTU 4-Zone Wall Mount Mini Split pairs a 6-zone capable 55K BTU condenser with three matched 6K and one 24K wall mount air handler. Three small rooms are covered alongside a large open-concept living area, with headroom to add two more zones later. The 24K zone uses a heavier-gauge 3/8" × 5/8" line set to match its higher refrigerant flow. Ships with 25 ft pre-charged line sets on every zone; longer runs available on request.

System Highlights

Compact Plus Graduated Zoning: Three matched 6K air handlers at 200 sq. ft. each, plus a 24K unit for large open spaces.
Maximum Expansion Headroom: The 55K condenser supports up to six zones, leaving two ports open for future handlers.
True DIY Installation: Patented pre-charged Quick Connect® line sets eliminate vacuuming, charging, and professional trade labor. Every line set in this kit includes the DIYPro® cable.
Smart Control: Wireless remotes, the SmartHVAC app for iOS and Android, plus Amazon Alexa and Google Assistant support out of the box.

What's Included

1 × DIY-MULTI6-55HP230D-O — 55K BTU Multi-Zone Condenser, 230V (6-zone capable)
3 × DIY-06-HP-WMAH-230D25-O — 6K BTU Wall Mount Air Handler, 230V
1 × DIY-24-HP-WMAH-230D25-O — 24K BTU Wall Mount Air Handler, 230V
3 × Pre-charged 25 ft 1/4" × 3/8" Quick Connect® line sets with DIYPro® cable (Zones 1–3)
1 × Pre-charged 25 ft 3/8" × 5/8" Quick Connect® line set with DIYPro® cable (Zone 4)
Wireless remotes, mounting hardware, and installation documentation

Condenser Specifications — DIY-MULTI6-55HP230D-O

Cooling / Heating Capacity	52,000 BTU / 55,000 BTU
Tonnage	4.6
Zone Capacity	6 (4 used in this kit)
Electrical	208–230V, 1 Phase, 60 Hz
Refrigerant	R-454B (pre-charged)
Compressor / Inverter	Rotary / DC
Max Total Line Set Length	221.4 ft

Zone Configuration

Zone	Model	Capacity & Coverage
Zone 1	DIY-06-HP-WMAH-230D25-O	6,000 BTU — up to 200 sq. ft.
Zone 2	DIY-06-HP-WMAH-230D25-O	6,000 BTU — up to 200 sq. ft.
Zone 3	DIY-06-HP-WMAH-230D25-O	6,000 BTU — up to 200 sq. ft.
Zone 4	DIY-24-HP-WMAH-230D25-O	24,000 BTU — large open-concept areas

Zones 1–3 use 1/4" liquid × 3/8" suction line sets. Zone 4 uses 3/8" liquid × 5/8" suction.

Engineering & Warranty

Gold Fin® Corrosion Protection against humidity and coastal salt exposure.
DC Inverter Drive scales output to match thermal load.
R-454B Refrigerant — more efficient and eco-friendly than R-410A.
Certifications: Intertek listed, UL Listed, ETL Listed, ENERGY STAR® certified, AHRI certified.
Warranty: 5-year parts and 7-year compressor coverage, eligible for the MRCOOL® Care Program.

Proposition 65 Warning: This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Key Information

Order Cutoff Time: 2:00 PM EST
Order Handling Time: 1–3 business days (Monday–Friday)
Transit Time: 1–7 business days (Monday–Friday)
Total Estimated Delivery Time: 3–11 business days (Monday–Friday)
Shipping Availability: Free Shipping On some Items In The Contiguous United States only

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Frequently Asked Questions for MRCOOL

Yes — this kit's pre-charged 25 ft Quick Connect line sets ship already filled with R-454B refrigerant, so no separate refrigerant purchase or professional charging is needed to complete the install.

The product page lists the DIY-MULTI6-55HP230D-O condenser's electrical requirement as 208-230V single-phase, 60Hz, but does not give a specific breaker amperage for this model — verify the exact figure from the unit's nameplate before sizing the circuit.

The three matched 6,000 BTU handlers (up to 200 sq ft each) handle the smaller rooms while the 24,000 BTU handler, on its own heavier-gauge 3/8" x 5/8" line set, is sized for large open-concept areas, letting the DC inverter condenser balance very different loads across zones at the same time.

Backed by MRCOOL's 5-year parts and 7-year compressor warranty, this DIY 5th Gen system is generally expected to deliver 15-20 years of service life with routine filter maintenance.

Yes — the kit includes all four wall-mount air handlers (three 6,000 BTU units and one 24,000 BTU unit) along with the condenser and pre-charged line sets, so the indoor heads ship with the system rather than being purchased separately.

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MRCOOL DIY 5th Gen 4-Zone 42,000 BTU Ductless Mini Split Air Conditioner & Heat Pump (6K+6K+6K+24K), DIY4-B-55HP06060624

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