MRCOOL 27k 4‑Zone DIY Multi‑Zone Bundle (12k + 12k Wall Mounts, Two 16 ft R‑454B Line Sets, 230V)

MRCOOL 27k 4‑Zone DIY Multi‑Zone Bundle (12k + 12k Wall Mounts, Two 16 ft R‑454B Line Sets, 230V)

Experience modern, multi‑zone comfort with the MRCOOL 27k 4‑Zone DIY Multi‑Zone Bundle (12k + 12k Wall Mounts, Two 16 ft R‑454B Line Sets, 230V) — a complete ductless HVAC solution designed for easy home installation and high‑efficiency performance. This bundle includes a powerful 27,000 BTU outdoor condenser paired with two 12,000 BTU wall‑mount air handlers, giving you efficient heating and cooling for two rooms while offering future expansion to additional indoor units. Engineered for homeowners, this system requires no special HVAC tools or refrigerant handling, thanks to the included pre‑charged line sets that make setup straightforward and hassle‑free.

Optimized for flexibility and control, this system brings personalized comfort to every zone. Each wall‑mount unit operates independently, allowing you to cool or heat different rooms at different settings. With smart control capability through mobile apps and voice‑assistant compatibility, you can adjust airflow and temperature from anywhere, maximizing convenience while reducing energy usage and costs.

Built around eco‑friendly R‑454B refrigerant and DC inverter technology, this 5th generation MRCOOL DIY system delivers strong seasonal efficiency that keeps your space comfortable year‑round. Whether it’s hot summer afternoons or chilly winter nights, the advanced heat pump design provides consistent performance without the need for professional installation — empowering DIYers to take control of their indoor climate solutions.

Complete with installation hardware, remotes, and pre‑charged line sets, this MRCOOL bundle gives you everything needed for a successful installation. From lounges and bedrooms to offices and living spaces, bring custom comfort to your home with a system that’s designed to grow as your needs change.

Features

• True DIY installation with pre‑charged R‑454B QuickConnect® line sets — no refrigerant handling or vacuum tools required

• Multi‑Zone Control: Independent temperature settings for each zone

• SmartHVAC® app compatibility for iOS/Android and support for Alexa & Google Assistant

• Efficient DC inverter technology for quiet, energy‑saving operation

• Eco‑friendly R‑454B refrigerant

Specifications

What’s Included 

IN THIS COMPLETE DIY BUNDLE – MRCOOL DIYM227HPW04D00:

• (1) DIY-MULTI4-27HP230D-O – 27k BTU 4-Zone Multi-Zone Outdoor Condenser (230V, R-454B)
• (2) DIY-12-HP-WMAH-230D25-O – 12k BTU DIY 5th Gen Wall-Mount Air Handlers (each up to ~550 sq. ft.)
• (2) DIY16-1438-O – 16 ft R-454B Pre-Charged QuickConnect® Line Sets (1/4” x 3/8”)
• (2) Wireless remotes – one for each indoor unit
• DIYPRO® cable and mounting hardware as supplied by MRCOOL®
• MRCOOL® installation manuals & warranty registration information

Frequently Asked Questions (FAQ's)

Q: How many rooms can this system handle out of the box?

A: DIYM227HPW04D00 is designed for two 12k zones—perfect for two rooms up to ~550 sq. ft. each. The 27k condenser can support up to four indoor units total, so you can add more MRCOOL DIY air handlers later.

Q: What size breaker does the outdoor unit need?

A: The DIY-MULTI4-27HP230D-O condenser calls for a maximum 25A fuse/breaker and 23A MCA. Always confirm wire size and breaker selection with a licensed electrician and your local electrical code.

Q: Are the line sets included and pre-charged?

A: Yes. This bundle includes (2) DIY16-1438-O 16 ft line sets, each factory pre-charged with R-454B and using QuickConnect® fittings for true DIY installation—no vacuuming or refrigerant handling required.

Q: What kind of spaces is this bundle best for?

A: This setup is ideal for two medium-sized spaces like bedrooms, offices, living rooms, bonus rooms, studios, or finished basements where you want independent temperature control in each zone.

Q: Can I control everything from my phone?

A: Yes. The system supports the SmartHVAC® app, plus Amazon Alexa and Google Assistant, so you can adjust temperature, modes, and schedules from your phone or with your voice.