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6 Zone Bundle (New for 2025)

MRCOOL DIY 5th Gen Multi-Zone 6-Zone 55,000 BTU 22 SEER2 (12K + 12K + 12K + 12K + 12K + 12K) Ductless Mini-Split Air Conditioner and Heat Pump with Ceiling Cassettes

MRCOOL DIY 5th Gen Multi-Zone 6-Zone 55,000 BTU 22 SEER2 (12K + 12K + 12K + 12K + 12K + 12K) Ductless Mini-Split Air Conditioner and Heat Pump with Ceiling Cassettes

Regular price $12,335.00 USD
Regular price $17,022.30 USD Sale price $12,335.00 USD
Save $4,687.30 Sold out
Shipping calculated at checkout.

SKUDIYM655121212121212-CC

Type55K

Refrigerant Type: R-454B

✅ This item is in stock!

More than 30 available

Estimated Delivery: November 24 – November 26

Based on order date & typical delivery times.
• Orders Typically ship within 2 business days

Don't forget your pre-charged line sets.
Each zone/air handler will need its own length — click here to select.
16'25'35'41'50'60'66'75'
MRCOOL Pre-Charged Line Set
View full details

Have questions or need help selecting the perfect Mini Split system?

Talk with our expert HVAC team members now for assistance!!

PRODUCT DESCRIPTION

MRCOOL DIY 5th Gen 55,000 BTU 6-Zone Ceiling Cassette Mini-Split System | DIY-MULTI6-55HP230D-O

The MRCOOL DIY 5th Gen 55,000 BTU 6-Zone Ceiling Cassette Mini-Split is the largest-capacity DIY multi-zone system available. Pair the high-output condenser with your choice of low-profile ceiling cassette air handlers to heat and cool up to six individual zones with whisper-quiet performance, premium efficiency, and true DIY installation.

Mix and match 6K, 9K, 12K, and 18K cassette sizes for bedrooms, living areas, offices, shops, garages, or large open spaces. With up to 22 SEER2 cooling efficiency and HSPF2-4 10.6, this system delivers serious comfort while helping lower utility bills — even in extremes (heats to -13°F, cools to 122°F).

Key Features & Benefits

  • 6 zones from a single 55K condenser for whole-home or multi-room comfort.
  • ✔ Compatible with 6K / 9K / 12K / 18K ceiling cassette air handlers (flush-mount, low-profile).
  • Up to 22 SEER2, HSPF2-4 10.6, HSPF2-5 8.5 for excellent efficiency.
  • Quick-Connect® pre-charged line sets: no vacuum pump, no charging required (sold separately).
  • DIYPro® cable included — eliminates electrical conduit for easier installs.
  • Smart control with app, Alexa, and Google Assistant; Energy usage stats & scheduling.
  • Gold Fin® anti-corrosion coating on the condenser for long life.
  • Follow Me® remote tracks temp around you for pinpoint comfort.
  • Energy Star, AHRI, ETL/UL listed for verified performance.
  • ✔ Strong warranty: 5-yr parts, 7-yr compressor, and extended Limited Lifetime with MRCOOL® Care enrollment.
💡 Pro Tip: MRCOOL DIY ceiling cassettes include the WMK-19 Smart HVAC Wi-Fi Controller (plug-and-play). Connect it to your air handler, pair to Wi-Fi, and control the system via the MRCOOL or SmartHVAC apps — with built-in Alexa and Google voice support.

Technical Specifications

  • Brand / Series: MRCOOL — DIY 5th Gen Multi-Zone Mini-Splits
  • Model (Condenser): DIY-MULTI6-55HP230D-O
  • Cooling / Heating Capacity: 47,000 BTU / 55,000 BTU
  • Zones: Up to 6
  • Efficiency: SEER2 22; EER2 12; HSPF2-4 10.6; HSPF2-5 8.5
  • Refrigerant: R-454B (151.68 oz)
  • Electrical: 208/230V, 1-Phase, 60 Hz; Min. Circuit Ampacity 43A; Max Fuse/Breaker 45A
  • Sound Rating: 64 dBA
  • Line Set Compatibility: 25 ft standard; max combined length 221.4 ft
  • Line Sizes: Liquid 1/4"; Suction: (3/8" × 4) and (1/2" × 2)
  • Inverter Compressor: DC Rotary
  • Operating Range: Heat to −13°F; Cool to 122°F
  • Certifications: Energy Star, AHRI, ETL/UL, Intertek Listed 5031495
  • Smart Control: Wi-Fi, App, Alexa, Google Assistant (WMK-19)
  • Color: White
  • Condenser Dimensions (WxHxD): 37.48" × 52.48" × 16.34" (Net)
  • Condenser Weight: 245.81 lbs (Net)
  • Shipping Dimensions (WxHxD): 43.11" × 58.27" × 19.49" (Gross)
  • Shipping Weight: 267.46 lbs (Gross)
  • Warranty: 5-yr parts / 7-yr compressor; Extended Limited Lifetime with MRCOOL® Care (registration required)
  • SKU / UPC / GTIN: DIY-MULTI6-55HP230D-O / 840255587488 / 840255587488

Note: Quick-Connect® pre-charged line sets and ceiling cassette air handlers are sold separately to build your ideal 6-zone package.

Why buy from MRCOOL DIY Direct? Genuine MRCOOL equipment, expert support, and nationwide delivery — perfect for DIYers who want pro-level results without pro-level labor costs.

 

Rated 4.7 / 5 Stars
4700+ Verified Reviews

Comfort That Speaks for Itself

See why homeowners and pros alike trust MRCOOL DIY systems to deliver comfort, savings, and easy installation.

Each of our three MRCOOL air handlers runs perfectly quiet, and it’s awesome being able to control them separately. Installation videos made the whole process doable

Cindy M., Texas

I installed my MRCOOL Universal nearly two years ago. It’s been maintenance-free, super efficient, and I love how consistent the airflow is through my existing ducts

Dave K., Georgia

Our double-wide doesn’t have room for a big air handler, so the MRCOOL wall unit was perfect. Easy install, clean look, and it cools like a champ

Amy R., Florida

The quotes for replacing our old packaged unit were crazy. Installed a MRCOOL 18K system instead — now the living room and bedrooms stay cool all summer without breaking the bank.

Dean L., Alabama

You’d never know it’s running — it’s that quiet. The unit heats our entire single-wide better than the old furnace ever did.

Brenda C., Oklahoma

The MRCOOL mini-split doesn’t take up much space, which is perfect for our tight hallway. It cools faster than I expected and doesn’t trip the breaker like our old window unit.

Lori B., Mississippi

Each of our three MRCOOL air handlers runs perfectly quiet, and it’s awesome being able to control them separately. Installation videos made the whole process doable

Cindy M., Texas

I installed my MRCOOL Universal nearly two years ago. It’s been maintenance-free, super efficient, and I love how consistent the airflow is through my existing ducts

Dave K., Georgia

Our double-wide doesn’t have room for a big air handler, so the MRCOOL wall unit was perfect. Easy install, clean look, and it cools like a champ

Amy R., Florida

The quotes for replacing our old packaged unit were crazy. Installed a MRCOOL 18K system instead — now the living room and bedrooms stay cool all summer without breaking the bank.

Dean L., Alabama

You’d never know it’s running — it’s that quiet. The unit heats our entire single-wide better than the old furnace ever did.

Brenda C., Oklahoma

The MRCOOL mini-split doesn’t take up much space, which is perfect for our tight hallway. It cools faster than I expected and doesn’t trip the breaker like our old window unit.

Lori B., Mississippi

Each of our three MRCOOL air handlers runs perfectly quiet, and it’s awesome being able to control them separately. Installation videos made the whole process doable

Cindy M., Texas

I installed my MRCOOL Universal nearly two years ago. It’s been maintenance-free, super efficient, and I love how consistent the airflow is through my existing ducts

Dave K., Georgia

Our double-wide doesn’t have room for a big air handler, so the MRCOOL wall unit was perfect. Easy install, clean look, and it cools like a champ

Amy R., Florida

The quotes for replacing our old packaged unit were crazy. Installed a MRCOOL 18K system instead — now the living room and bedrooms stay cool all summer without breaking the bank.

Dean L., Alabama

You’d never know it’s running — it’s that quiet. The unit heats our entire single-wide better than the old furnace ever did.

Brenda C., Oklahoma

The MRCOOL mini-split doesn’t take up much space, which is perfect for our tight hallway. It cools faster than I expected and doesn’t trip the breaker like our old window unit.

Lori B., Mississippi

Each of our three MRCOOL air handlers runs perfectly quiet, and it’s awesome being able to control them separately. Installation videos made the whole process doable

Cindy M., Texas

I installed my MRCOOL Universal nearly two years ago. It’s been maintenance-free, super efficient, and I love how consistent the airflow is through my existing ducts

Dave K., Georgia

Our double-wide doesn’t have room for a big air handler, so the MRCOOL wall unit was perfect. Easy install, clean look, and it cools like a champ

Amy R., Florida

The quotes for replacing our old packaged unit were crazy. Installed a MRCOOL 18K system instead — now the living room and bedrooms stay cool all summer without breaking the bank.

Dean L., Alabama

You’d never know it’s running — it’s that quiet. The unit heats our entire single-wide better than the old furnace ever did.

Brenda C., Oklahoma

The MRCOOL mini-split doesn’t take up much space, which is perfect for our tight hallway. It cools faster than I expected and doesn’t trip the breaker like our old window unit.

Lori B., Mississippi

Each of our three MRCOOL air handlers runs perfectly quiet, and it’s awesome being able to control them separately. Installation videos made the whole process doable

Cindy M., Texas

I installed my MRCOOL Universal nearly two years ago. It’s been maintenance-free, super efficient, and I love how consistent the airflow is through my existing ducts

Dave K., Georgia

Our double-wide doesn’t have room for a big air handler, so the MRCOOL wall unit was perfect. Easy install, clean look, and it cools like a champ

Amy R., Florida

The quotes for replacing our old packaged unit were crazy. Installed a MRCOOL 18K system instead — now the living room and bedrooms stay cool all summer without breaking the bank.

Dean L., Alabama

You’d never know it’s running — it’s that quiet. The unit heats our entire single-wide better than the old furnace ever did.

Brenda C., Oklahoma

The MRCOOL mini-split doesn’t take up much space, which is perfect for our tight hallway. It cools faster than I expected and doesn’t trip the breaker like our old window unit.

Lori B., Mississippi

Each of our three MRCOOL air handlers runs perfectly quiet, and it’s awesome being able to control them separately. Installation videos made the whole process doable

Cindy M., Texas

I installed my MRCOOL Universal nearly two years ago. It’s been maintenance-free, super efficient, and I love how consistent the airflow is through my existing ducts

Dave K., Georgia

Our double-wide doesn’t have room for a big air handler, so the MRCOOL wall unit was perfect. Easy install, clean look, and it cools like a champ

Amy R., Florida

The quotes for replacing our old packaged unit were crazy. Installed a MRCOOL 18K system instead — now the living room and bedrooms stay cool all summer without breaking the bank.

Dean L., Alabama

You’d never know it’s running — it’s that quiet. The unit heats our entire single-wide better than the old furnace ever did.

Brenda C., Oklahoma

The MRCOOL mini-split doesn’t take up much space, which is perfect for our tight hallway. It cools faster than I expected and doesn’t trip the breaker like our old window unit.

Lori B., Mississippi

Each of our three MRCOOL air handlers runs perfectly quiet, and it’s awesome being able to control them separately. Installation videos made the whole process doable

Cindy M., Texas

I installed my MRCOOL Universal nearly two years ago. It’s been maintenance-free, super efficient, and I love how consistent the airflow is through my existing ducts

Dave K., Georgia

Our double-wide doesn’t have room for a big air handler, so the MRCOOL wall unit was perfect. Easy install, clean look, and it cools like a champ

Amy R., Florida

The quotes for replacing our old packaged unit were crazy. Installed a MRCOOL 18K system instead — now the living room and bedrooms stay cool all summer without breaking the bank.

Dean L., Alabama

You’d never know it’s running — it’s that quiet. The unit heats our entire single-wide better than the old furnace ever did.

Brenda C., Oklahoma

The MRCOOL mini-split doesn’t take up much space, which is perfect for our tight hallway. It cools faster than I expected and doesn’t trip the breaker like our old window unit.

Lori B., Mississippi

Each of our three MRCOOL air handlers runs perfectly quiet, and it’s awesome being able to control them separately. Installation videos made the whole process doable

Cindy M., Texas

I installed my MRCOOL Universal nearly two years ago. It’s been maintenance-free, super efficient, and I love how consistent the airflow is through my existing ducts

Dave K., Georgia

Our double-wide doesn’t have room for a big air handler, so the MRCOOL wall unit was perfect. Easy install, clean look, and it cools like a champ

Amy R., Florida

The quotes for replacing our old packaged unit were crazy. Installed a MRCOOL 18K system instead — now the living room and bedrooms stay cool all summer without breaking the bank.

Dean L., Alabama

You’d never know it’s running — it’s that quiet. The unit heats our entire single-wide better than the old furnace ever did.

Brenda C., Oklahoma

The MRCOOL mini-split doesn’t take up much space, which is perfect for our tight hallway. It cools faster than I expected and doesn’t trip the breaker like our old window unit.

Lori B., Mississippi

Each of our three MRCOOL air handlers runs perfectly quiet, and it’s awesome being able to control them separately. Installation videos made the whole process doable

Cindy M., Texas

I installed my MRCOOL Universal nearly two years ago. It’s been maintenance-free, super efficient, and I love how consistent the airflow is through my existing ducts

Dave K., Georgia

Our double-wide doesn’t have room for a big air handler, so the MRCOOL wall unit was perfect. Easy install, clean look, and it cools like a champ

Amy R., Florida

The quotes for replacing our old packaged unit were crazy. Installed a MRCOOL 18K system instead — now the living room and bedrooms stay cool all summer without breaking the bank.

Dean L., Alabama

You’d never know it’s running — it’s that quiet. The unit heats our entire single-wide better than the old furnace ever did.

Brenda C., Oklahoma

The MRCOOL mini-split doesn’t take up much space, which is perfect for our tight hallway. It cools faster than I expected and doesn’t trip the breaker like our old window unit.

Lori B., Mississippi

Each of our three MRCOOL air handlers runs perfectly quiet, and it’s awesome being able to control them separately. Installation videos made the whole process doable

Cindy M., Texas

I installed my MRCOOL Universal nearly two years ago. It’s been maintenance-free, super efficient, and I love how consistent the airflow is through my existing ducts

Dave K., Georgia

Our double-wide doesn’t have room for a big air handler, so the MRCOOL wall unit was perfect. Easy install, clean look, and it cools like a champ

Amy R., Florida

The quotes for replacing our old packaged unit were crazy. Installed a MRCOOL 18K system instead — now the living room and bedrooms stay cool all summer without breaking the bank.

Dean L., Alabama

You’d never know it’s running — it’s that quiet. The unit heats our entire single-wide better than the old furnace ever did.

Brenda C., Oklahoma

The MRCOOL mini-split doesn’t take up much space, which is perfect for our tight hallway. It cools faster than I expected and doesn’t trip the breaker like our old window unit.

Lori B., Mississippi