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

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

Experience personalized comfort in two rooms without the need for a professional HVAC installation with the MRCOOL 27K 2‑Zone DIY Multi‑Zone Mini Split System. This factory‑configured bundle pairs the powerful 27,000 BTU DIY‑MULTI4‑27HP230D‑O outdoor condenser with one 9K wall‑mount air handler and one 18K wall‑mount air handler, along with two pre‑charged 16 ft QuickConnect® R‑454B line sets — enabling a true DIY installation using only basic tools. Say goodbye to vacuum pumps, refrigerant handling, and complex setup.

Designed for efficiency and year‑round comfort, this 2‑zone system delivers high performance with up to 23 SEER2 cooling efficiency and 9.5 HSPF2‑4 heating performance. Both zones operate independently, so you can tailor the temperature in a smaller space (up to ~400 sq ft) with the 9K head, and a larger space (up to ~800 sq ft) with the 18K head — ideal for bedrooms, living rooms, offices, or bonus areas.

Control your comfort your way — with included remotes, the SmartHVAC™ app on iOS or Android, or using hands‑free voice commands via Amazon Alexa and Google Assistant. Features like Dry Mode, Follow Me, Sleep Mode, and Quiet Mode help you fine‑tune conditions while minimizing energy use and noise.

Built for long‑term reliability, this bundle also includes MRCOOL’s industry‑leading DIY warranty with a 5‑year parts coverage, 7‑year compressor protection, and Extended Limited Lifetime replacement when registered with MRCOOL Care.

Features

• True DIY Installation: No vacuum pump or HVAC license required — QuickConnect® pre‑charged line sets and DIYPRO® communication cable make setup easy.

• Independent Zone Control: Customize comfort in two distinct areas with separate air handlers.

• Smart Control Options: Use remotes, SmartHVAC app, Alexa, or Google Assistant to manage temperature and modes.

• Efficient & Eco‑Friendly: High SEER2 and HSPF2 ratings with R‑454B refrigerant promote lower energy costs.

• Expandable System: Condenser supports up to four indoor units, allowing future expansion.

• Quiet Operation: Designed for low sound levels for both indoor and outdoor units.

Specifications

 What’s Included

• 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 (FAQ's)

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.