MRCOOL 36k 5th Gen DIY Multi‑Zone Bundle 12K + 18K with Dual 25ft Line Sets (230V) R‑454B — DIYM236HPW05D07

MRCOOL 36k 5th Gen DIY Multi‑Zone Bundle 12K + 18K with Dual 25ft Line Sets (230V) R‑454B — DIYM236HPW05D07

Experience cutting‑edge comfort and flexibility with the MRCOOL 36k 5th Gen DIY Multi‑Zone Bundle 12K + 18K with Dual 25ft Line Sets (230V). This all‑in‑one HVAC solution is engineered for homeowners who want powerful heating and cooling in two separate living spaces, all without relying on professional HVAC installation. Built around MRCOOL’s advanced 5th Generation multi‑zone platform, this bundle includes a high‑efficiency outdoor condenser and two perfectly matched indoor wall‑mount air handlers — ideal for bedrooms, living rooms, or other areas up to approximately 1,350 sq. ft. combined.

Designed for true DIY installation, every component comes factory pre‑charged with environmentally friendly R‑454B refrigerant and features MRCOOL’s Quick‑Connect® fittings, so you can install the system easily and confidently. Whether you’re upgrading your home’s HVAC or installing comfort where it’s needed most, this MRCOOL bundle delivers dependable performance, smart controls, and zoned comfort tailored to your lifestyle.

Control your indoor climate with ease using the included wireless remotes or MRCOOL’s SmartHVAC® app, compatible with Amazon Alexa and Google Assistant. Each indoor unit offers independent temperature control, quiet operation, and comfort‑focused features such as Dry Mode and Follow Me® temperature sensing — giving you a personalized climate in every zone.

Perfect for split‑level homes, remote rooms, or setups where indoor heads are located farther from the outdoor condenser, this dual‑zone solution balances performance, convenience, and modern smart home integration. If you’re looking to upgrade to a powerful, DIY‑friendly HVAC setup with future expandability, this MRCOOL bundle sets a new standard for comfort and ease.

Features

• True DIY Installation: Factory pre‑charged R‑454B line sets with Quick‑Connect® fittings — no vacuum pump required when installed per instructions.

• Zoned Comfort: Two indoor units (12K and 18K) with independent controls provide tailored heating/cooling in separate spaces up to ~1,350 sq. ft. combined.

• Smart Control: Compatible with MRCOOL’s SmartHVAC® app, Amazon Alexa, and Google Assistant for easy Wi‑Fi control.

• Quiet Operation & Comfort Modes: Dry Mode for humidity control, Quiet Mode, Follow Me® temperature sensing, and multi‑speed fan operation.

• Efficient Outdoor Condenser: 36,000 BTU unit with 23 SEER2 and 12 EER2 efficiency ratings for high performance and energy savings.

• Future Expandability: Outdoor condenser supports up to five indoor units for potential future system expansion.

Specifications

What’s Included

✔ 36,000 BTU 5th Gen DIY Multi-Zone Condenser — 

DIY-MULTI5-36HP230D-O

• 36,000 BTU, 5-zone ready multi-zone heat pump condenser
• Supports connecting up to five indoor units on one outdoor
• High efficiency: 23 SEER2, 12 EER2, 9.9 HSPF2-4, 7.5 HSPF2-5
• Uses R-454B, MRCOOL’s next-gen refrigerant
• Works with MRCOOL DIY indoor units from 6K–36K BTU
• Quick-Connect® ports for pre-charged line sets
• SmartHVAC® app integration plus Alexa & Google Assistant compatibility
• DC inverter rotary compressor for efficient, quiet modulation
• Gold Fin® corrosion-resistant outdoor coil
• Ideal total coverage up to about 1,500 sq. ft. in many configurations

Condenser Electrical Specs

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

✔ 12,000 BTU DIY Wall Mount Air Handler — 

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

• 12,000 BTU 5th Gen DIY ductless mini split air handler
• Ideal for areas up to about 550 sq. ft.
• Great for bedrooms, offices, bonus rooms, or smaller living spaces
• Pairs with the included DIY25-1438-O 25 ft line set
• Comes with DIYPRO® cable to simplify electrical routing

Comfort & Control:

• Wireless remote included
• SmartHVAC® app for iOS & Android
• Amazon Alexa & Google Assistant support
• Follow Me® temperature sensing at the remote
• Dry Mode to help control humidity
• Quiet Mode, oscillating louvers, and multi-speed fan

✔ 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
• Ideal for larger rooms up to about 800 sq. ft.
• Perfect for living rooms, open-concept spaces, or big master suites
• Uses larger 1/2” suction line and pairs with DIY25-1412-O
• Includes DIYPRO® cable for a cleaner install

Comfort & Control:

• Wireless remote with Follow Me® function
• SmartHVAC® app control on phone or tablet
• Works with Alexa and Google Assistant
• Dry Mode, fan-only mode, oscillation, and Quiet Mode

✔ 25 ft 1/4” × 3/8” Quick-Connect Line Set — 

DIY25-1438-O

• 25 ft pre-charged R-454B line set
• Size: 1/4” liquid × 3/8” suction
• Designed for 6K, 9K & 12K DIY indoor units
• Fully pre-charged with 2.12 oz R-454B (per manufacturer data)
• Quick-Connect® fittings—no vacuum pump when installed per MRCOOL instructions
• Perfect match for the 12K DIY air handler when it’s farther from the condenser

✔ 25 ft 1/4” × 1/2” Quick-Connect Line Set — 

DIY25-1412-O

• 25 ft pre-charged R-454B line set
• Size: 1/4” liquid × 1/2” suction
• Designed for 9K, 12K & 18K DIY indoor units
• Pre-charged with 2.12 oz R-454B
• Quick-Connect® fittings for fast DIY installation
• Ideal for the 18K DIY air handler with a longer run from the outdoor unit

Frequently Asked Questions (FAQ's)

1. What’s the difference between DIYM236HPW05D01 and DIYM236HPW05D07?

The DIYM236HPW05D07 bundle includes two 25 ft line sets (one for the 12K and one for the 18K). The 05D01 version uses a 16 ft line set for the 12K and a 25 ft line set for the 18K.

2. Is this still a true DIY system?

Yes. Both line sets are factory pre-charged with R-454B and use MRCOOL’s Quick-Connect® fittings. When you follow MRCOOL’s instructions, you don’t need vacuum pumps or refrigerant gauges.

3. What breaker size do I need for the outdoor unit?

For the DIY-MULTI5-36HP230D-O condenser:

• Minimum Circuit Ampacity (MCA): 30.5A

• Maximum Fuse/Breaker: 35A

Always have a licensed electrician size and install the circuit to local code and MRCOOL’s manual.

4. How much space can this bundle heat and cool?

Approximate coverage:

• 12K zone: up to ~550 sq. ft.

• 18K zone: up to ~800 sq. ft.

Total around 1,300–1,350 sq. ft., depending on climate, insulation, ceiling height, and layout.

5. Can I add more zones later?

Yes. The 36k 5-zone condenser can support additional MRCOOL DIY indoor units as long as you stay under MRCOOL’s total BTU and port limits.

6. Why dual 25 ft line sets?

This configuration is chosen when both zones are farther from the outdoor unit, giving you more flexibility in where you mount the indoor heads.

7. What refrigerant does this bundle use?

Every component in this bundle uses R-454B.

8. Do both zones have independent temperature control?

Yes. The 12K and 18K air handlers each have their own remote and WiFi control, so you can set separate temperatures, fan speeds, and schedules.

9. Will this system help with humidity?

Yes. Both indoor units have DRY MODE to reduce excess humidity while cooling.

10. Is this bundle quiet enough for bedrooms and living areas?

Yes. The units include Quiet Mode and low fan speeds designed to keep noise down, making them suitable for bedrooms, offices, and living spaces.

11. Does it support Alexa and Google Assistant?

Yes. With the SmartHVAC® module and app, the system works with Amazon Alexa and Google Assistant.

12. What warranties apply?

When properly installed and registered:

• 5-year parts warranty

• 7-year compressor warranty

• Extended Limited Lifetime Replacement Warranty when enrolled in the MRCOOL® Care Program (see MRCOOL’s terms).