MRCOOL 36k 5th Gen DIY Multi‑Zone Bundle Dual 12K Air Handlers & 16ft Line Sets (230V) R‑454B — DIYM236HPW04D00

MRCOOL 36k 5th Gen DIY Multi‑Zone Bundle Dual 12K Air Handlers & 16ft Line Sets (230V) R‑454B — DIYM236HPW04D00

The MRCOOL 36k 5th Gen DIY Multi‑Zone Bundle Dual 12K Air Handlers & 16ft Line Sets (Model: DIYM236HPW04D00) is a comprehensive ductless mini‑split multi‑zone system engineered for homeowners seeking dependable, high‑efficiency comfort across two rooms with balanced cooling and heating. Designed with the modern DIY installer in mind, this 5th Generation MRCOOL system combines powerful performance with straightforward installation — no vacuum pump, gauges, or refrigerant handling is required when following MRCOOL’s instructions.

At its core is a 36,000 BTU outdoor condenser capable of supporting up to five indoor units, providing a platform that’s both versatile and future‑ready. In this bundle, you get two identical 12,000 BTU wall‑mounted air handlers — ideal for bedrooms, offices, dens, or other similar‑sized spaces (up to ~550 sq. ft each). This creates two balanced comfort zones with evenly distributed capacity, promoting efficient operation and consistent comfort throughout your home.

Each included air handler operates as a complete heat pump for year‑round cooling and heating, featuring modern comfort controls such as wireless remotes, SmartHVAC® app compatibility, and voice control via Amazon Alexa and Google Assistant. The system’s pre‑charged R‑454B Quick‑Connect® line sets simplify installation and reduce setup time, while the inverter‑driven compressor and advanced refrigerant help deliver quieter operation and improved energy efficiency.

Whether you’re conditioning a pair of bedrooms, an upstairs office and a guest room, or creating comfortable separate living areas in a small home or rental unit, this MRCOOL multi‑zone bundle offers a scalable and smart solution with strong warranty options and the flexibility to expand later.

Features

• True DIY installation with pre‑charged R‑454B Quick‑Connect® line sets, eliminating the need for a vacuum pump or refrigerant handling.

• 36,000 BTU 5th Gen multi‑zone condenser supports up to five indoor units for future expansion.

• Two 12,000 BTU wall‑mount air handlers provide balanced comfort for two rooms up to ~550 sq. ft each.

• SmartHVAC® app compatibility plus Amazon Alexa & Google Assistant support for intuitive control.

• Comfort features including Wireless remote, Follow Me® temperature sensing, Dry Mode, and Quiet Mode.

• Energy‑efficient inverter technology and R‑454B refrigerant for enhanced performance and lower global warming potential.

• Gold Fin® corrosion‑resistant outdoor coil for durability.

• Expandable platform with strong manufacturer warranty options (Extended Limited Lifetime*, 5‑year parts, 7‑year compressor).

Specifications

What’s Included

✔ 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 zones from one outdoor unit
• High efficiency: 23 SEER2, 12 EER2, 9.9 HSPF2-4, 7.5 HSPF2-5
• Factory-charged with R-454B refrigerant (more efficient, eco-friendlier than R-410A)
• Works with 5th Gen DIY air handlers from 6K to 36K BTU
• Quick-Connect® ports for pre-charged DIY line sets (no vacuuming required)
• SmartHVAC® app control plus Amazon Alexa and Google Assistant support
• DC inverter rotary compressor for quiet, modulating operation
• Gold Fin® corrosion-resistant outdoor coil
• Ideal total coverage up to around 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

✔ 2 × 12,000 BTU DIY Wall-Mount Air Handlers — 

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

(Two identical indoor units in this bundle.)

• 12,000 BTU 5th Gen DIY ductless mini-split heat pump air handler, 208/230V
• Comfort coverage: up to ~550 sq. ft. per zone
• Perfect for bedrooms, offices, bonus rooms, rental suites, or smaller living spaces
• Designed for easy DIY installation with R-454B Quick-Connect® line sets (sold as DIY16-1438-O)
• Includes DIYPRO® cable, eliminating the need for electrical conduit and improving durability
• Operates as a full heat pump for year-round heating and cooling

Comfort & Control Features:

• Wireless remote control included
• SmartHVAC® app for iOS and Android
• Amazon Alexa & Google Assistant compatible
• Follow Me® function uses the remote’s sensor to help maintain the temperature where you are
• Dry Mode helps reduce excess humidity
• Quiet Mode for extra-low noise in bedrooms and offices
• Multi-speed fan and auto modes for flexible comfort control

Specs (per 12K air handler):

• Mount type: Wall
• Voltage: 208/230V, 1-phase, 60 Hz
• Max coverage: ~550 sq. ft.
• Oscillation: Yes
• Filter type: Reusable
• Fan only option: Yes
• Quiet Mode & Auto Cool: Yes
• WiFi compatibility: Yes
• App compatibility: Yes (iOS & Android)
• UL & ETL listed, AHRI certified
• Registered warranty: Extended Limited Lifetime*
• Base parts warranty: 5 years
• Base compressor warranty: 7 years
• Net dimensions (approx): 31.57” W × 11.63” H × 7.44” D 

✔ 2 × 16ft R-454B Quick-Connect Line Sets (1/4” × 3/8”) — 

DIY16-1438-O

(Two line sets included, one for each 12K air handler.)

• 16-foot pre-charged R-454B Quick-Connect® line set
• 1/4” liquid line × 3/8” suction line
• Sized for 6K, 9K & 12K MRCOOL DIY indoor units
• Factory vacuum-sealed and pre-charged with 2.12 oz of R-454B
• Quick-Connect® fittings on both ends for fast, no-vacuum installation
• White insulated finish with Bronze/Copper Metallic line set core
• Ideal when the condenser is on the same wall or just around one corner from the indoor unit

Frequently Asked Questions (FAQ's)

1. Can I install this MRCOOL DIY bundle myself?

Yes. This system is designed for DIY installation using pre-charged R-454B Quick-Connect® line sets. No vacuum pump or refrigerant handling is required if installed according to MRCOOL instructions.

2. How many zones can the DIY-MULTI5-36HP230D-O support?

The 36k multi-zone condenser can support up to 5 indoor units. This bundle uses two 12K air handlers, leaving capacity for up to three more zones later.

3. What room size is each 12K air handler designed for?

Each 12,000 BTU air handler is typically ideal for spaces up to about 550 sq. ft. depending on insulation, windows, and climate.

4. What breaker size does the condenser require?

The condenser electrical ratings are:

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

Always follow MRCOOL’s installation manual and local electrical codes when selecting wire and breaker size.

5. How long are the included line sets?

This bundle includes two 16ft line sets (DIY16-1438-O), each 1/4” × 3/8”, pre-charged with R-454B.

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

Yes. You can extend runs with MRCOOL DIY coupler kits and additional pre-charged line sets, as long as you stay within the condenser’s maximum total line length and design limits.

7. What refrigerant does this system use?

This 5th Gen MRCOOL DIY system uses R-454B, which is more efficient and has a lower global warming potential than R-410A.

8. Is this system quiet enough for bedrooms?

Yes. The 12K air handlers feature Quiet Mode and low operating sound levels, making them suitable for bedrooms and home offices.

9. Does this system dehumidify as well as cool?

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

10. Can I control each 12K zone separately?

Yes. Each indoor unit has its own remote and its own WiFi control, so you can set different temperatures and schedules for each room.

11. Does this bundle support smart home integration?

Yes. The system works with the SmartHVAC® App, Amazon Alexa, and Google Assistant for voice and app-based control.