StoreDeal.ai store
Shop
  • Deals
  • Deal checker
  • Black Friday
  • Buying guides
  • Brands
  • Stores
Travel
  • Flight deals
  • Hotel deals
Company
  • Research
  • Press
  • Use in AI assistants
  • Contact
  • deal.ai apps
Black Friday 2026
  • Walmart
  • Best Buy
  • Target
  • TVs
  • Laptops
  • Headphones
  • Apple
  • Gaming
  • Vacuums
  • Kitchen
  • Toys
  • Smartwatches
  • Tablets
  • Furniture
  • Mattresses
© Deal.ai Inc.·2222 Ponce de Leon Blvd, Miami, FL 33134·support@deal.ai
TermsPrivacy
Deal.ai › MRCOOL
MRCOOL
MRCOOL DIY 5th Gen Multi-Zone 2-Zone 18,000 BTU 24 SEER2 (12K + 12K) Ductless Mini-Split Air Conditioner and Heat Pump with Ceiling Cassettes

MRCOOL DIY 5th Gen Multi-Zone 2-Zone 18,000 BTU 24 SEER2 (12K + 12K) Ductless Mini-Split Air Conditioner and Heat Pump with Ceiling Cassettes

4.8(17 ratings)

Best price now

$4,851.00at Chill Mini SplitsChecked Nov 9

Prices are checked against each store and labelled with when.

Visit Chill Mini Splits

Ask our agent about this product

It checks today's price at every store, compares the alternatives and answers in about a minute.

Enter to send, Shift+Enter for a new line

Price facts

  • Last seen at $4,851.00 at Chill Mini Splits on Nov 9.

Our take on the MRCOOL DIY 5th Gen Multi-Zone 2-Zone 18,000 BTU 24 SEER2 (12K + 12K) Ductless Mini-Split Air Conditioner and Heat Pump with Ceiling Cassettes

A two-zone ductless heat pump that cools or heats two rooms from one 18,000 BTU outdoor condenser, using two 12,000 BTU ceiling cassettes instead of wall units. The cassettes recess into ceilings on 16-inch joist centers, so they stay out of sight and free up wall space. The DIY Quick Connect line set and No-Vac setup let a handy homeowner install it without special tools or training, which is the main draw over conventional mini-splits that need a licensed installer. It suits owners finishing a basement, addition or open living area who want discreet, efficient comfort and are willing to take on the install.

Best forHomeowners adding AC and heat to two rooms without ductworkNew construction or retrofits with accessible ceiling joistsBuyers who want a discreet ceiling-mounted systemDIYers comfortable with a pre-charged line set install
Pros
  • Two zones from one condenser, each cassette rated 12,000 BTU
  • Ceiling cassettes stay out of sight and save wall space
  • Recesses between joists on 16-inch centers, including I-joists
  • Quick Connect line set and No-Vac Coupler simplify installation
  • Heat pump runs in reverse for winter heating
  • 24 SEER2 rating is high for a multi-zone system
Cons
  • Ceiling install needs attic or joist access and more planning than a wall unit
  • Cassette service and filter cleaning happen overhead
  • Two 12K cassettes limit you to smaller rooms, not one large open space
  • DIY install still involves refrigerant lines, electrical and permits

MRCOOL DIY 5th Gen Multi-Zone 2-Zone 18,000 BTU 24 SEER2 (12K + 12K) Ductless Mini-Split Air Conditioner and Heat Pump with Ceiling Cassettes prices at every store

  • Chill Mini SplitsNew

    In stockReturn policy

    $4,851.00Checked Nov 9
    Visit Chill Mini Splits

What reviewers say

  • 4.8 / 517 ratings

Ratings are strong, with owners mainly pleased by the quiet, out-of-sight ceiling cassettes and the straightforward DIY hookup. Complaints center on the planning the ceiling install demands.

What people mention
  • InstallationPraisedOwners say the Quick Connect line set makes the DIY hookup manageable.
  • Ceiling installMixedThe recessed cassette looks clean, but planning the ceiling cut and joist placement takes care.
  • NoisePraisedReviewers describe the cassettes as quiet in both modes.
  • Filter accessCriticisedCleaning filters overhead is less convenient than a wall unit.
  • HeatingPraisedOwners report the heat pump handles winter heating well.

About the MRCOOL DIY 5th Gen Multi-Zone 2-Zone 18,000 BTU 24 SEER2 (12K + 12K) Ductless Mini-Split Air Conditioner and Heat Pump with Ceiling Cassettes

This MRCOOL DIY 5th Gen multi-zone mini-split heats and cools two rooms from one 18,000 BTU condenser. It includes two 12,000 BTU ceiling cassette air handlers. It is a heat pump, so it can run in reverse and pull heat from the outdoors in heating mode. It has a DC inverter, a Gold Fin condenser and a 100% sealed system, and it uses R-454B refrigerant.

The DIY design needs no special tools or training to install. It uses pre-charged Quick Connect line sets, and the No-Vac Coupler can extend the line set length. The cassettes sit out of sight and can be recessed between joists on 16-inch centers, including pre-manufactured I-joists. They need no ductwork or wall space. The Elevation function lowers the filter panel for easy filter maintenance.

The system can be controlled from the Smart HVAC smartphone app. The app also lets you set schedules, temperature ranges and operating modes. It works with Amazon Alexa and Google Home for voice control. The cassettes offer quiet operation and multiple operating modes, and the system provides low ambient cooling.

Model
DIY-MULTI3-18HP230D-O (condenser)
Series
DIY 5th Gen Multi-Zone Mini-splits
Capacity
18,000 BTU condenser
Zones
2 (12K + 12K)
Air handlers
2 ceiling cassettes, 12,000 BTU each
Condenser capacity
Supports up to 3 air handlers
Voltage
230V
Refrigerant
R-454B
Functions
Heating and cooling (heat pump)
Cassette install
Fits between joists on 16-inch centers, including I-joists

Questions and answers

Can I really install this myself?
MRCOOL designed it around a pre-charged Quick Connect line set and No-Vac Coupler, so no brazing or vacuum pump is needed. You still need basic electrical work and a permit in most areas.
How many rooms can it serve?
Two zones, each with its own 12,000 BTU ceiling cassette. That suits two medium rooms rather than one large open floor.
Will the cassettes fit my ceiling?
They recess between joists on 16-inch centers, including pre-manufactured I-joists, for new construction or retrofits. Check clearance above the ceiling before buying.
Does it heat as well as cool?
Yes. It is a heat pump, so it reverses to pull heat from outdoor air in winter.
What warranty comes with it?
A 7-year compressor warranty with an optional lifetime compressor warranty, plus 5 years on parts.
What is in the box?
The outdoor condenser, two ceiling cassettes, and the Quick Connect line set and No-Vac Coupler for the DIY connection.
Where is the MRCOOL DIY 5th Gen Multi-Zone 2-Zone 18,000 BTU 24 SEER2 (12K + 12K) Ductless Mini-Split Air Conditioner and Heat Pump with Ceiling Cassettes cheapest?
At Chill Mini Splits, for $4,851.00, as of our latest check.
What do buyers say about the MRCOOL DIY 5th Gen Multi-Zone 2-Zone 18,000 BTU 24 SEER2 (12K + 12K) Ductless Mini-Split Air Conditioner and Heat Pump with Ceiling Cassettes?
Rated 4.8 out of 5 from 17 ratings.

More from MRCOOL

  • M
    MRCOOL DIY 5th Gen Multi-Zone 2-Zone 18,000 BTU 24 SEER2 (9K + 9K) Ductless Mini-Split Air Conditioner and Heat Pump
    MRCOOL DIY 5th Gen Multi-Zone 2-Zone 18,000 BTU 24 SEER2 (9K + 9K) Ductless Mini-Split Air Conditioner and Heat Pump
  • M
    MRCOOL DIY 3-Zone 18K BTU 24 SEER2 Mini Split
    MRCOOL DIY 3-Zone 18K BTU 24 SEER2 Mini Split
  • M
    MRCOOL DIY 3-Zone 18K BTU 24 SEER2 Mini Split 6K + 6K + 6K
    MRCOOL DIY 3-Zone 18K BTU 24 SEER2 Mini Split 6K + 6K + 6K
  • M
    MRCOOL DIY 5th Gen 2-Zone 18,000 BTU Mini Split Condenser with 18K + 6K Ceiling Cassette Air Handlers
    MRCOOL DIY 5th Gen 2-Zone 18,000 BTU Mini Split Condenser with 18K + 6K Ceiling Cassette Air Handlers
Controls
Smart HVAC smartphone app; Amazon Alexa and Google Home
Warranty
7-year compressor (optional lifetime compressor warranty), 5-year parts, limited lifetime on ceiling cassettes
Support
Lifetime technical support
M
MRCOOL DIY 5th Gen 3-Zone 18K 24 SEER2 Mini Split 6K+6K+9K
MRCOOL DIY 5th Gen 3-Zone 18K 24 SEER2 Mini Split 6K+6K+9K
  • M
    MRCOOL DIY 5th Gen 27K BTU Dual Zone Mini Split 18K+18K
    MRCOOL DIY 5th Gen 27K BTU Dual Zone Mini Split 18K+18K
  • M
    MRCOOL DIY Gen 5 Mini Split AC
    MRCOOL DIY Gen 5 Mini Split AC
  • M
    MRCOOL Natural Gas Tankless Water Heater MHWH199NCNU
    MRCOOL Natural Gas Tankless Water Heater MHWH199NCNU
  • All MRCOOL deals and products →

    More ductless mini split heat pumps

    • M
      MRCOOL DIY 4th Gen 18,000 BTU 1.5 Ton Ductless Mini Split Air Conditioner and Heat Pump
      MRCOOL DIY 4th Gen 18,000 BTU 1.5 Ton Ductless Mini Split Air Conditioner and Heat Pump
    • C
      Cooper & Hunter Sophia 18,000 BTU Ductless Mini Split Heat Pump
      Cooper & Hunter Sophia 18,000 BTU Ductless Mini Split Heat Pump
    • S
      Senville LETO 18,000 BTU Mini Split Air Conditioner Heat Pump
      Senville LETO 18,000 BTU Mini Split Air Conditioner Heat Pump
    • M
      MRCOOL DIY 12K BTU 23.5 SEER2 5th Gen Ductless Mini Split Heat Pump System - 115V
      MRCOOL DIY 12K BTU 23.5 SEER2 5th Gen Ductless Mini Split Heat Pump System - 115V
    • M
      MRCOOL DIY 5th Gen 2-Zone 18,000 BTU 24 SEER2 (9K + 9K) Ductless Mini Split AC and Heat Pump with Ceiling Cassettes
      MRCOOL DIY 5th Gen 2-Zone 18,000 BTU 24 SEER2 (9K + 9K) Ductless Mini Split AC and Heat Pump with Ceiling Cassettes
    • M
      MRCOOL DIY 5th Gen Multi-Zone 2-Zone 18,000 BTU 24 SEER2 (6K + 12K) Ductless Mini-Split Air Conditioner and Heat Pump
      MRCOOL DIY 5th Gen Multi-Zone 2-Zone 18,000 BTU 24 SEER2 (6K + 12K) Ductless Mini-Split Air Conditioner and Heat Pump
    • M
      MRCOOL DIY 36K BTU 18 SEER2 5th Gen Ductless Mini Split Heat Pump System - 230V
      MRCOOL DIY 36K BTU 18 SEER2 5th Gen Ductless Mini Split Heat Pump System - 230V
    • M
      MRCOOL DIY 18K BTU 22.5 SEER2 5th Gen Ductless Mini Split Heat Pump System - 230V
      MRCOOL DIY 18K BTU 22.5 SEER2 5th Gen Ductless Mini Split Heat Pump System - 230V