MRCOOL 18K 3‑Zone DIY Mini Split System With Three 6K Air Handlers & 16 ft Pre‑Charged Line Sets DIYM318HPW00D00

MRCOOL 18K 3‑Zone DIY Mini Split System With Three 6K Air Handlers & 16 ft Pre‑Charged Line Sets DIYM318HPW00D00

The MRCOOL 18K 3‑Zone DIY Mini Split System With Three 6K Air Handlers & 16 ft Pre‑Charged Line Sets DIYM318HPW00D00 is a versatile and powerful multi‑zone ductless mini split system designed to deliver efficient heating and cooling across three separate zones without the need for professional installation. Perfect for homeowners managing comfort in bedrooms, offices, nurseries, or compact living spaces, this complete HVAC solution combines energy‑saving performance with intuitive controls and whisper‑quiet operation. The included triple 6K air handlers offer independent room‑by‑room comfort, while the outdoor condenser provides reliable performance year‑round.

Engineered for true do‑it‑yourself installation, this system uses pre‑charged R‑454B Quick‑Connect® line sets that eliminate the need for vacuum pumps or specialized tools, making setup easier and faster than traditional mini split installations. The MRCOOL SmartHVAC app and compatibility with voice assistants like Amazon Alexa and Google Assistant bring modern convenience to climate control, letting you set schedules, adjust temperatures, and monitor performance from anywhere.

Featuring high‑efficiency inverter technology, the system provides balanced heating and cooling while keeping utility costs low. Whether you’re outfitting a rental unit or upgrading multiple rooms in your home, this multi‑zone bundle provides customizable comfort and dependable performance.

Features

• DIY Quick‑Connect Line Sets – Pre‑charged R‑454B line sets make installation easy without gauges or vacuum pumps.

• Multi‑Zone Comfort – Three independent 6K indoor air handlers allow personalized temperature control in three spaces.

• Smart Control – MRCOOL SmartHVAC app with Wi‑Fi connectivity plus Amazon Alexa and Google Assistant support.

• Quiet Operation – Whisper‑quiet performance from wall‑mounted handlers for comfortable, disturbance‑free zones.

• Energy Efficient – DC inverter technology optimizes energy use for both heating and cooling.

• Independent Zone Control – Each zone runs separately for targeted comfort.

• Complete Kit – Includes outdoor condenser, three indoor units, line sets, remotes, DIYPro® communication cables, mounting hardware, and installation guide.

Specifications

What’s Included 

✔ Outdoor

• (1) 18K MRCOOL DIY 3-Zone Condenser (DIY-MULTI3-18HP230D-O)

✔ Indoor

• (3) 6K Wall-Mounted Air Handlers (DIY-06-HP-WMAH-230D25-O)

✔ Line Sets

• (3) 16 ft Pre-Charged Line Sets (DIY16-1438-O)

✔ Accessories

• (3) remotes
• (3) DIYPro® communication cables
• Mounting brackets & hardware
• SmartHVAC app module
• Installation manual

Frequently Asked Questions (FAQ's)

What size rooms can the 6K units handle?

Up to 100–200 sq. ft. each — perfect for bedrooms, offices, or small dens.

Can all three zones run at different temperatures?

Yes — every room has independent temperature control.

Is this system fully DIY?

Yes. All refrigerant line sets are pre-charged and factory sealed.

Can I add larger air handlers later?

Yes — as long as the total BTU load does not exceed the condenser’s limits.

Does this system work with apps and voice control?

Yes — via SmartHVAC + Alexa + Google