MRCOOL DIY 5th Gen 4-Zone 51,000 BTU Ductless Mini Split Air Conditioner & Heat Pump (9K+9K+9K+24K), DIY4-B-55HP09090924

MRCOOL DIY 5th Gen 4-Zone 51,000 BTU Ductless Mini Split Air Conditioner & Heat Pump (9K+9K+9K+24K), DIY4-B-55HP09090924 No Vac Quick Connect

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MRCOOL DIY 5th Gen 4-Zone 51,000 BTU Ductless Mini Split Air Conditioner & Heat Pump (9K+9K+9K+24K), DIY4-B-55HP09090924

Name: MRCOOL DIY 5th Gen 4-Zone 51,000 BTU Ductless Mini Split Air Conditioner & Heat Pump (9K+9K+9K+24K), DIY4-B-55HP09090924
Brand: MRCOOL
SKU: DIY4-B-55HP09090924
Price: 8210.00 USD
Availability: InStock

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SKU: DIY4-B-55HP09090924

Price:

$8,210.00

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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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51,000 BTU Connected Capacity • Balanced Bedroom Zoning • 6-Zone Capable Condenser

MRCOOL® DIY® 5th Gen 4-Zone Wall Mount Mini Split (9K+9K+9K+24K)

The MRCOOL® DIY® 5th Generation 51,000 BTU 4-Zone Wall Mount Mini Split pairs a 6-zone capable 55K BTU condenser with three matched 9K and one 24K wall mount air handler. Three bedrooms round out this system alongside a large open living area, with headroom to add two more zones later. Ships with 25 ft pre-charged line sets on every zone; longer runs available on request.

System Highlights

Balanced Bedroom Zoning: Three matched 9K air handlers at 400 sq. ft. each, plus a 24K unit for a large open living area.
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-09-HP-WMAH-230D25-O — 9K 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-09-HP-WMAH-230D25-O	9,000 BTU — up to 400 sq. ft.
Zone 2	DIY-09-HP-WMAH-230D25-O	9,000 BTU — up to 400 sq. ft.
Zone 3	DIY-09-HP-WMAH-230D25-O	9,000 BTU — up to 400 sq. ft.
Zone 4	DIY-24-HP-WMAH-230D25-O	24,000 BTU — up to 1,200 sq. ft.

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.

Download the MRCOOL Brochure

Get the full official MRCOOL DIY 5th Generation Brochure PDF — specs, lineup, and details.

Download Brochure (PDF)

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 — the DIY4-B-55HP09090924 kit uses pre-charged Quick Connect line sets that eliminate vacuuming, refrigerant charging, and professional trade labor for true DIY installation.

Zones 1 through 3 are matched 9,000 BTU units each covering up to 400 sq ft, and Zone 4 is a 24,000 BTU unit covering up to 1,200 sq ft.

Yes — it is a heat pump system that provides both air conditioning and heating from the single condenser, in this case rated at 52,000 BTU cooling / 55,000 BTU heating.

The DIY-MULTI6-55HP230D-O condenser operates on a 208–230V, single-phase, 60 Hz supply; breaker sizing should be verified against the unit's nameplate rating and local code.

It uses R-454B refrigerant and is ENERGY STAR certified, along with AHRI, UL, ETL, and Intertek listings.

It includes wireless remotes, the SmartHVAC app for iOS and Android, and built-in Amazon Alexa and Google Assistant support.

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MRCOOL DIY 5th Gen 4-Zone 51,000 BTU Ductless Mini Split Air Conditioner & Heat Pump (9K+9K+9K+24K), DIY4-B-55HP09090924

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