MRCOOL® 27K 2-Zone DIY® Multi-Zone Mini Split (9K + 18K) – DIY-MULTI4-27HP230D-O, Pre-Charged 16ft Line Sets, R-454B — DIYM227HPW03D00

Product Description 

Model: DIYM227HPW03D00

Get true zoned comfort in two different rooms without paying for a traditional HVAC install with the MRCOOL® DIYM227HPW03D00 27K 2-Zone Multi-Zone Mini Split System. This factory-configured bundle pairs the DIY-MULTI4-27HP230D-O 27,000 BTU 4-zone condenser with one 9K wall-mount air handler, one 18K wall-mount air handler, and two pre-charged 16 ft QuickConnect® line sets—all designed to be installed by a homeowner using basic tools.

Instead of hiring an HVAC crew, this MRCOOL® DIY system uses patented DIY® QuickConnect® R-454B line sets and DIYPRO® cable so you never handle refrigerant and never pull a vacuum. You get professional-grade performance with true DIY installation.

The 9K head is perfect for a small room up to ~400 sq ft (bedroom, office, nursery), and the 18K head is sized for a larger space up to ~800 sq ft (living room, master bedroom, open loft). Both zones have completely independent temperature control, fan speeds, and operating modes.

At the heart of the system is the DIY-MULTI4-27HP230D-O condenser, delivering up to 23 SEER2 cooling and 9.5 HSPF2-4 heating with an ultra-efficient DC inverter rotary compressor and eco-forward R-454B refrigerant. It supports up to four indoor units, so this 2-zone bundle leaves room to add heads later if you ever want to expand.

Control everything your way—use the included remotes, the SmartHVAC™ app on iOS or Android, or hands-free voice control with Amazon Alexa or Google Assistant. Features like Dry Mode, Follow Me, Quiet Mode, and programmable scheduling help you dial in comfort while keeping your energy bills low all year long.

Backed by MRCOOL’s industry-leading DIY warranty (5-year parts, 7-year compressor, and Extended Limited Lifetime replacement with MRCOOL® Care registration), this MRCOOL DIY multi-zone bundle gives you serious performance, long-term reliability, and real DIY savings.

 

Ideal Use & Room Applications

 

 

This 27K 2-zone DIY system is ideal when you need two rooms with different loads and comfort needs:

9K Zone – up to ~400 sq ft (DIY-09-HP-WMAH-230D25-O)

Great for:

• Small bedrooms and nurseries
• Home offices or studios
• Gaming rooms, hobby rooms
• Small retail offices or salon suites

 

18K Zone – up to ~800 sq ft (DIY-18-HP-WMAH-230D25-O)

Great for:

• Living rooms and open-concept spaces
• Large master bedrooms
• Finished basements
• Bonus rooms over garages

 

Perfect use cases:

• Bedroom + living room combo
• Office + main family room
• Rental/Airbnb split zones (small bedroom + main area)
• Small business office + customer area

 

Because the condenser supports 4 zones total, you can add extra heads later without replacing the outdoor unit.

 

System Components & Key Specs

 

 

 

Outdoor Condenser – DIY-MULTI4-27HP230D-O

• Capacity: 26,000 BTU cooling / 26,000 BTU heating (27K class)
• Zones Supported: Up to 4 indoor units (2 used in this bundle)
• Efficiency: 23 SEER2, 12 EER2, 9.5 HSPF2-4, 7 HSPF2-5
• Tonnage: 2.25 ton
• Refrigerant: R-454B (84.66 oz, pre-charged at factory)
• Voltage: 208/230V, 1-Phase, 60 Hz
• Inverter: DC inverter rotary compressor
• Max Fuse Breaker (MOP): 25A
• Minimum Circuit Ampacity (MCA): 23A
• Line Sizes: 1/4” liquid, 3/8” suction
• Max Total Line Length: 221.4 ft
• Sound Level: 61 dBA
• Color: White
• Certifications: UL, ETL, Energy Star, AHRI
• Net Dimensions (W × H × D): 37.24” × 31.89” × 16.14”
• Net Weight: 140.21 lbs

 

 

 

 Indoor Air Handlers

 

9K Wall-Mount Air Handler – DIY-09-HP-WMAH-230D25-O

• Coverage: Up to 400 sq ft
• Mount Type: Wall mount
• Voltage: 208/230V, 1-Phase, 60 Hz
• Modes: Cool, Heat, Auto, Dry (dehumidify), Fan, Sleep, Quiet
• Smart Control: Remote, SmartHVAC app, Alexa, Google Assistant
• Filter: Reusable washable filter
• Oscillation: Yes
• WiFi: Yes
• Net Dimensions (W × H × D): 31.57” × 11.69” × 7.44”
• Net Weight: 24.47 lbs

 

18K Wall-Mount Air Handler – DIY-18-HP-WMAH-230D25-O

• Coverage: Up to 800 sq ft
• Tonnage: 1.5 ton
• Voltage: 208/230V, 1-Phase, 60 Hz
• Max Fuse Breaker (indoor circuit): 15A (shared system circuit)
• Min Circuit Ampacity: 3A (unit)
• Sound: 19–54.5 dBA (low to high)
• Fan Speeds: 5
• Line Sizes: 1/4” liquid, 1/2” suction
• Smart Modes: Follow Me, Dry Mode, Sleep, Quiet
• Net Dimensions (W × H × D): 42.52” × 13.19” × 8.9”
• Net Weight: 35.49 lbs

 

⚠ Both indoor units are powered and controlled from the outdoor unit via DIYPRO® cable—no separate high-voltage feed to the heads.

 

Included Line Sets

DIY16-1438-O – 16 ft 1/4” x 3/8” Pre-Charged Line Set

• Compatible Indoors: DIY 6K / 9K / 12K
• Length: 16 ft
• Sizes: 1/4” liquid, 3/8” suction
• Refrigerant: R-454B, 2.12 oz (pre-charged)
• Connection: Quick-Connection DIY® QuickConnect®

 

DIY16-1412-O – 16 ft 1/4” x 1/2” Pre-Charged Line Set

• Compatible Indoors: DIY 9K / 12K / 18K
• Length: 16 ft
• Sizes: 1/4” liquid, 1/2” suction
• Refrigerant: R-454B, 2.12 oz (pre-charged)
• Connection: Quick-Connection DIY® QuickConnect®

 

 What’s Included – DIYM227HPW03D00

 

 

 

• 1 × 27K 5th Gen DIY Multi-Zone Condenser
  – Model: DIY-MULTI4-27HP230D-O
• 1 × 9K DIY Wall-Mount Air Handler
  – Model: DIY-09-HP-WMAH-230D25-O
• 1 × 18K DIY Wall-Mount Air Handler
  – Model: DIY-18-HP-WMAH-230D25-O
• 1 × 16 ft DIY® QuickConnect® Line Set (1/4” x 3/8”)
  – Model: DIY16-1438-O
• 1 × 16 ft DIY® QuickConnect® Line Set (1/4” x 1/2”)
  – Model: DIY16-1412-O
• DIYPRO® communication/power cable
• Wireless remotes for each indoor unit
• SmartHVAC WiFi/app capability
• Mounting hardware and manuals

 

 

 Frequently Asked Questions

Q: Is DIYM227HPW03D00 really DIY, or do I need a pro?

This system is part of the MRCOOL® DIY® lineup, designed specifically for homeowners. The line sets are factory pre-charged, and no vacuum pump or refrigerant tools are needed.

 

Q: What size spaces is this bundle best for?

• The 9K head works best in 150–400 sq ft rooms (small bedroom, office, nursery).
• The 18K head is ideal for 400–800 sq ft spaces (living room, big bedroom, open bonus room).

 

 

 

Q: Can I expand to more zones later?

Yes. The condenser supports up to 4 zones. This bundle uses 2 zones now, leaving capacity for 2 more indoor units.

 

Q: Are the line sets actually pre-charged?

Yes. Both line sets (DIY16-1438-O and DIY16-1412-O) come factory pre-charged with R-454B and sealed with QuickConnect® fittings.

 

Q: Can I control each room separately?

Yes. Each indoor unit has its own remote and independent temperature control. You can also control both via the app.

 

Q: Does this system work with Alexa and Google?

Yes. The SmartHVAC app integrates with Amazon Alexa and Google Assistant for voice control.

 

Why Buy from MRCOOL DIRECT (Not Random Resellers)

 

 

We are USA’s #1 most trusted MRCOOL dealer, focusing on MRCOOL systems every day.

 

• Dedicated MRCOOL-only expertise
• Sizing help for multi-zone layouts
• Authorized, warranty-safe equipment
• Fast, nationwide shipping
• Real human support before & after your install

📞 Call 615-553-8118 if you want to confirm room sizes, breaker requirements, or future zone expansion before you order.

BUY DIRECT!