MRCOOL® 36k 5th Gen DIY® Multi-Zone Bundle with (12K + 18K) Air Handlers (16ft + 16ft) Pre-Charged R-464B Line Sets (230V)- DIYM236HPW05D00

Product Description 

Model: DIYM236HPW05D00

MRCOOL DIYM236HPW05D00 – 36k 5th Gen DIY Multi-Zone Bundle with 12K & 18K + 16ft Line Sets

The MRCOOL DIYM236HPW05D00 bundle is built for homeowners who want two different room sizes on one DIY-friendly 5th Gen multi-zone system. This package combines the 36,000 BTU DIY-MULTI5-36HP230D-O condenser with one 12,000 BTU (DIY-12-HP-WMAH-230D25-O) and one 18,000 BTU (DIY-18-HP-WMAH-230D25-O) wall-mount air handler, plus the correct pre-charged 16 ft R-454B Quick-Connect® line sets for each zone.

Use the 12K indoor unit for a bedroom, office, or smaller living area up to about 550 sq. ft., and the 18K indoor unit for a larger room up to about 800 sq. ft. Together, they can comfortably handle around 1,300–1,350 sq. ft. depending on insulation and climate.

Like all MRCOOL DIY systems, this bundle is designed for true DIY installation. The line sets are factory pre-charged with R-454B, sealed, and ready to connect—no vacuum pump, no gauges, and no refrigerant handling required when installed per MRCOOL’s instructions.

What’s Included in the MRCOOL DIYM236HPW05D00 Bundle

✔ 1 × 36,000 BTU 5-Zone DIY Condenser — 

DIY-MULTI5-36HP230D-O

• 36,000 BTU 5th Gen DIY multi-zone condenser, 208/230V, 1-phase
• Supports up to 5 indoor units from one outdoor unit
• High efficiency: 23 SEER2, 12 EER2, 9.9 HSPF2-4, 7.5 HSPF2-5
• Factory-charged with R-454B (more efficient, lower GWP than R-410A)
• Compatible with MRCOOL 5th Gen DIY indoor units from 6K–36K BTU
• Quick-Connect® ports for pre-charged DIY line sets (no vacuuming)
• SmartHVAC® app ready plus Amazon Alexa and Google Assistant support
• DC inverter rotary compressor for quiet, modulating operation
• Gold Fin® corrosion-resistant outdoor coil
• Ideal for total coverage up to about 1,500 sq. ft. depending on layout and climate

Electrical (Condenser):

• Voltage: 208/230V, 1-Phase, 60 Hz
• Minimum Circuit Ampacity (MCA): 30.5A
• Maximum Fuse / Breaker: 35A

✔ 1 × 12,000 BTU DIY Wall-Mount Air Handler — 

DIY-12-HP-WMAH-230D25-O

• 12,000 BTU 5th Gen DIY ductless mini-split heat pump air handler
• Designed for rooms up to about 550 sq. ft.
• Perfect for bedrooms, offices, and smaller living areas
• Works with pre-charged R-454B Quick-Connect® line sets (in this bundle: DIY16-1438-O)
• Includes DIYPRO® cable to eliminate separate conduit and improve durability

Comfort & Control Features:

• Wireless remote control included
• SmartHVAC® app for iOS & Android
• Works with Amazon Alexa & Google Assistant
• Follow Me® function uses the remote as a temperature sensor
• Dry Mode for better humidity control
• Quiet Mode plus multiple fan speeds

Key Specs (12K air handler):

• Voltage: 208/230V, 1-phase, 60 Hz
• Mount type: Wall
• Max coverage: ~550 sq. ft.
• Filter type: Reusable
• Oscillation: Yes
• Fan only option: Yes
• WiFi compatibility: Yes
• UL & ETL listed, AHRI certified
• Warranty (when registered): 5-year parts, 7-year compressor, Extended Limited Lifetime via MRCOOL® Care (per MRCOOL terms)

✔ 1 × 18,000 BTU DIY Wall-Mount Air Handler — 

DIY-18-HP-WMAH-230D25-O

• 18,000 BTU 5th Gen DIY ductless heat pump air handler
• Designed for spaces up to about 800 sq. ft.
• Great for large living rooms, open basements, big master bedrooms, or combined living/dining areas
• Uses the larger 1/4” × 1/2” line size (matched in this bundle with DIY16-1412-O)
• Includes DIYPRO® cable for simplified electrical and better protection

Comfort & Control Features:

• Wireless remote plus SmartHVAC® app
• Alexa & Google Assistant compatible
• Follow Me® function for more accurate comfort where you are
• Dry Mode for humidity removal
• Quiet Mode and 5 fan speeds for flexible noise and comfort

Key Specs (18K air handler):

• Tonnage: 1.5 Ton
• Voltage: 208/230V, 1-phase, 60 Hz
• Max Fuse Breaker (air handler): 15A
• Min Circuit Ampacity: 3A
• Max coverage: ~800 sq. ft.
• Liquid line: 1/4”
• Suction line: 1/2”
• UL & ETL listed, Energy Star & AHRI certified
• Same MRCOOL DIY warranty structure (5-year parts, 7-year compressor, Extended Lifetime when eligible)

The air handlers are powered by the communication wire from condenser. 

✔ 1 × 16 ft R-454B Quick-Connect® Line Set (1/4” × 3/8”) — 

DIY16-1438-O

• 16 ft pre-charged line set for 6K, 9K & 12K MRCOOL DIY indoor units
• Size: 1/4” liquid × 3/8” suction
• Pre-charged with 2.12 oz of R-454B refrigerant
• Quick-Connect® fittings — no vacuum pump required when used as directed
• Designed to pair with the 12K DIY air handler in this bundle

✔ 1 × 16 ft R-454B Quick-Connect® Line Set (1/4” × 1/2”) — 

DIY16-1412-O

• 16 ft pre-charged line set for 9K, 12K & 18K MRCOOL DIY indoor units
• Size: 1/4” liquid × 1/2” suction
• Pre-charged with 2.12 oz of R-454B
• Quick-Connect® design for simple DIY installation
• Sized correctly for the 18K DIY air handler in this bundle

This configuration is ideal when:

• One room is medium (~12K) and the other is larger (~18K)
• You want properly sized capacity for each room instead of oversizing or undersizing
• You’re conditioning a bedroom + living room, office + great room, or two different-sized spaces on the same level

Highlights:

• True DIY install — pre-charged line sets, Quick-Connect® fittings
• Balanced comfort — 12K for the smaller room, 18K for the larger room
• Future-ready R-454B refrigerant
• Smart controls: app, WiFi, Alexa, Google
• Expandable platform — 36k condenser can still be expanded up to 5 total indoor units
• Strong MRCOOL warranty protection when installed and registered correctly

FAQ – MRCOOL DIYM236HPW05D00 36k 5th Gen DIY Multi-Zone Bundle (12K + 18K, 16ft)

1. Is this system really DIY-friendly?

Yes. The MRCOOL DIY line is built around pre-charged Quick-Connect® line sets, so you don’t have to handle refrigerant or pull a vacuum when you follow MRCOOL’s instructions.

2. How many zones can the 36k condenser handle?

The DIY-MULTI5-36HP230D-O can support up to 5 indoor units. This bundle uses two (12K + 18K), so you can still add up to three more zones later.

3. What room sizes are the 12K and 18K air handlers best for?

• 12K: Up to about 550 sq. ft.
• 18K: Up to about 800 sq. ft.

Actual sizing depends on insulation, windows, and climate.

4. What breaker size does the outdoor unit need?

• Minimum Circuit Ampacity (MCA): 30.5A
• Maximum Fuse / Breaker: 35A

Always follow MRCOOL’s installation manual and local electrical code.

5. How long are the included line sets and what sizes are they?

• DIY16-1438-O: 16 ft, 1/4” × 3/8”, pre-charged R-454B — typically used for the 12K
• DIY16-1412-O: 16 ft, 1/4” × 1/2”, pre-charged R-454B — sized for the 18K

6. Can I extend the 16 ft line sets if needed?

Yes. MRCOOL offers DIY coupler kits and additional pre-charged line sets, as long as you stay within the condenser’s total line length and configuration limits.

7. What refrigerant does this system use?

All components in this bundle use R-454B, MRCOOL’s new-generation refrigerant with higher efficiency and lower global warming potential than R-410A.

8. Is the system quiet enough for bedrooms?

Yes. Both indoor units have Quiet Mode, multiple fan speeds, and low sound levels that make them suitable for bedrooms and home offices.

9. Will this system dehumidify my space?

Yes. DRY MODE focuses on removing humidity while still providing cooling, which is especially useful in humid climates.

10. Can I control the 12K and 18K zones separately?

Absolutely. Each indoor unit has its own remote and WiFi controls, so you can set different temperatures and schedules in each room.

11. Does it work with smart home systems?

Yes. The included SmartHVAC® technology works with the SmartHVAC app, Amazon Alexa, and Google Assistant.

12. Is my warranty valid if I buy from MRCOOL Direct?

Yes. MRCOOL Direct is an authorized MRCOOL dealer, so your warranty is fully supported when installed and registered correctly.

13. What warranties are included?

• 5-year parts warranty
• 7-year compressor warranty
• Extended Limited Lifetime Replacement Warranty when registered and enrolled in MRCOOL® Care (per MRCOOL terms).

14. Is this bundle good for a bedroom plus a living room?

Yes. The 12K + 18K combo is ideal for a medium bedroom plus a larger living room or open area on the same system.

15. Should I hire an electrician?

If you’re not 100% comfortable working with 208/230V electrical circuits, you should use a licensed electrician to install the breaker, disconnect, and outdoor power wiring. Always go by your state code.

Why Buy From MRCOOL DIRECT?

When you order from MRCOOL Direct, you get:

• ✅ Authorized MRCOOL dealer – Your warranty is protected
• ✅ Factory-fresh units – No refurbished or mystery sources
• ✅ Fast U.S. shipping – Most in-stock items ship in 1–3 business days
• ✅ Financing options – Make high-efficiency comfort more affordable
• ✅ Real product support – Help with sizing, line set selection, and DIY questions
• ✅ No third-party marketplace middlemen – Just genuine MRCOOL systems from a trusted dealer

BUY DIRECT!

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