White ceiling cassette air handler front view with filter grille and control panel
White ceiling cassette air handler front with vent opening and dark sound panel
Ceiling cassette ductless mini split air handler installed in a modern living room
White ceiling cassette air handler unit with slim vent grille in rectangular frame
White ceiling cassette air handler with front grille and HVAC vent panels, MRCOOL
White ceiling cassette air handler showing airflow arrows and underside vent grille
MRCOOL white ceiling cassette ductless air handler with front grille and control panel
White ceiling cassette air handler with side housing panels and front vent grille
White ceiling cassette air handler with exposed internal components and vent opening
MRCOOL ductless ceiling cassette air handler rear frame with mounting holes and ports
MRCOOL ductless ceiling cassette air handler base with air intake channels and frame
MRCOOL ductless ceiling cassette air handler open chassis with ports and wiring access
MRCOOL ductless ceiling cassette air handler base and duct opening, side cutaway view
MRCOOL ductless ceiling cassette air handler internal housing, side view with cover panels
MRCOOL ductless ceiling cassette air handler underside view with installed components
MRCOOL ductless ceiling cassette air handler side view with internal pipes and ports
MRCOOL white ceiling cassette ductless air handler with vent louvers and front grille
Roll over image to zoom in Click on image to zoom
White ceiling cassette air handler front view with filter grille and control panelWhite ceiling cassette air handler front with vent opening and dark sound panelCeiling cassette ductless mini split air handler installed in a modern living roomWhite ceiling cassette air handler unit with slim vent grille in rectangular frameWhite ceiling cassette air handler with front grille and HVAC vent panels, MRCOOLWhite ceiling cassette air handler showing airflow arrows and underside vent grilleMRCOOL white ceiling cassette ductless air handler with front grille and control panelWhite ceiling cassette air handler with side housing panels and front vent grilleWhite ceiling cassette air handler with exposed internal components and vent openingMRCOOL ductless ceiling cassette air handler rear frame with mounting holes and portsMRCOOL ductless ceiling cassette air handler base with air intake channels and frameMRCOOL ductless ceiling cassette air handler open chassis with ports and wiring accessMRCOOL ductless ceiling cassette air handler base and duct opening, side cutaway viewMRCOOL ductless ceiling cassette air handler internal housing, side view with cover panelsMRCOOL ductless ceiling cassette air handler underside view with installed componentsMRCOOL ductless ceiling cassette air handler side view with internal pipes and portsMRCOOL white ceiling cassette ductless air handler with vent louvers and front grille
Click on image to zoom

MRCOOL DIY® Series 5th Gen OuttaSight® 12K BTU 230V One-Way Ceiling Cassette Air Handler (DIYCASSETTE12HP-230D25-O)

MRCOOLSKU: DIYCASSETTE12HP-230D25-O
47 reviews
Price:
$1,421.00 $1,749.00SAVE 18%
Air Handler Type:
BTU:
In Stock
Estimated delivery: Sep 7th-16th
Free Curbside Delivery — carrier calls to schedule

Free Curbside Delivery

Included on every order
Ships free by freight carrier. Your order leaves the warehouse tracked, on a palletized freight truck.
The carrier calls ahead. You'll schedule a delivery window that works for you before the truck heads out.
Delivered to the curb. The item is placed at the end of your driveway. Moving it inside is your responsibility, so plan to have help on hand for heavy pieces.
Before you sign: inspect the packaging for damage. Signing the delivery receipt confirms it arrived in good condition.
In-Home Protection Plan
Home Outlet Direct + CPS

Add an Extended Protection Plan by CPS and Enjoy Peace of Mind!

Protection Plan Benefits:
  • Covers 100% parts and labor for product defects in materials and workmanship
  • Replacement of product if it cannot be repaired
  • No deductibles
  • Protection from dust, heat and internal humidity damage
  • Damage caused by power surges
  • In-home service
Full Coverage Details
No deductibles
International coverage
Easy claims process

Description

The 5th Generation MRCOOL® DIY® Series OuttaSight® 12K BTU 230V One-Way Ceiling Cassette is a sleek, efficient, and space-saving climate solution for areas up to 550 sq. ft. Engineered for easy installation, it seamlessly integrates into multi-zone systems, making it ideal for both new constructions and retrofit projects without requiring ductwork or wall space.

Designed for discreet placement, this cassette mounts flush between 16” ceiling joists, including pre-manufactured I-joists, providing a clean, modern appearance while maximizing room layout flexibility. It connects effortlessly to the MRCOOL® DIY® Quick Connect® line set, which comes pre-charged with R-454B, a more environmentally friendly refrigerant, eliminating the need for vacuuming and reducing installation time. With advanced filtration technology, this unit enhances indoor air quality, while the Elevation function lowers the filter panel for easy maintenance and cleaning. It operates quietly, ensuring a comfortable and peaceful environment in any room.

The cassette is fully controllable through a wireless remote, SmartHVAC app, and voice commands via Amazon Alexa and Google Assistant, giving you ultimate convenience and customization. Backed by an industry-leading warranty, including a limited lifetime warranty, a 7-year compressor warranty, and a 5-year parts warranty, this system offers long-term dependability and year-round comfort.

Features

  • Low Profile Installation
  • Fits between 16" Ceiling Joists
  • Works with Multi and Single Zone Systems
  • Two-Stage DC motor
  • Quiet Operation
  • Multiple Operating Modes
  • Remote Included
  • Advanced Filtration
  • Swing Technology
DIMENSIONS & WEIGHT
Dimensions
13.19" D x 8.98" H x 50.31" W
Net Weight (Lbs)
45
Gross Weight (Lbs)
88
GENERAL INFORMATION
Mount Type
Ceiling
Color
White
Max Coverage Area
550
Air Flow Direction
1-Way
Quiet Mode
Yes
CAPACITY & PERFORMANCE
CFM
353 / 312 / 283 / 247 / 177
Cycle
60
COMPRESSOR & MOTORS
Blower Motor RPM
1075/982/797
NOISE LEVELS
Decibel Rating (DBA)
37
Decibel Rating Low (DBA)
24
Decibel Rating High (DBA)
41
ELECTRICAL REQUIREMENTS
Voltage (V)
208-230
Phase
1
Max Fuse Breaker (A)
15
Min Circuit Ampacity (A)
3
Rated Load
1
REFRIGERANT & PIPING
Refrigerant Type
R-454B
Liquid Line Size
1/4
Suction Line Size
3/8
FILTER & HEATING
Filter Type
Reusable
CONTROLS & CONNECTIVITY
Fan Only Option
Yes
Sleep Mode
Yes
Auto Cool
Yes
WIFI Compatibility
Yes
APP Compatibility
Yes
Works with IOS
Yes
Works with Android
Yes
Remote Control Included
Yes
SAFETY
Has Batteries
Yes
Contains Electronics
Yes
Contains Chemicals
Yes
Contains Aerosol
Yes
Contains Compressed Gas
Yes
Proposition 65 Warning
Yes
Restricted States
  • GU
  • PR
  • VI
WARRANTY
Registered Warranty
Limited Lifetime Compressor
Base Warranty
5-Year Part/7-Year Compressor
Bas Parts Warranty
5 Years
Registered Compressor Warranty
Limited Lifetime Compressor
Base Compressor Warranty
7 Years

MRCOOL Mini Split BTU Guide

Drawn to scale — 1 square = 2 × 2 ft
36K BTU
24K BTU
18K BTU
12K BTU
9K BTU
6K BTU
6K BTU up to 250 sq ft · Small bedroom, office
9K BTU up to 375 sq ft · Bedroom, home office
12K BTU up to 500 sq ft · Large bedroom, den
18K BTU up to 750 sq ft · Living room, master suite
24K BTU up to 1000 sq ft · Open living area
36K BTU up to 1500 sq ft · Great room, small home
Between sizes? Round up. A slightly larger unit runs efficiently at partial load — an undersized one runs constantly.
Shipping
  • Free Shipping on all orders.
  • Large Appliances: Ship via Curbside Delivery — the carrier delivers to your property but not inside your home.
  • Small Items: Ship via standard ground delivery (FedEx or similar), such as small appliances, range hoods, sinks, faucets, and accessories.
Full shipping policy
Returns
  • 30-Day Return Policy: Return requests must be submitted within 30 days of your delivery date. We cannot process returns after this period.
  • Return Requirements: Products must be unused, uninstalled, and in their original packaging (including box and pallet) to qualify.
  • Restocking Fee: A restocking fee may apply and varies by brand.
Full returns policy
Authorized MRCOOL Dealer
Full manufacturer warranty on every MRCOOL product we sell.
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Customer Reviews

Based on 47 reviews
87%
(41)
11%
(5)
2%
(1)
0%
(0)
0%
(0)
J
Jim M. (Los Angeles, CA)
Easy to install and working great.

I needed to replace another unit that a previous contractor didn't do any part of that installation correctly, and the condensation line was leaking inside the house, running down the wall since that installation!! The indoor coil was 1-1/2" out of level, the line set wasn't wrapped, the electrical was tapped into the same circuit as the garage light and outlets...it was a mess.

It took me more time to demo the old unit out than to install the one I bought from you.

Thank you.

Jim M. review photo Jim M. review photo
B
Bill (Philadelphia, PA)
Very pleased.

Very pleased with the price, delivery, ease of installation, and above all during this heatwave it is working excellently.

Bill review photo
N
Natalie N. (San Jose, CA)
Perfect for our needs!

I ordered a 2 zone unit for the bedrooms in our home. It took a few months to arrive (manufacturer issue, nothing to do with HOD, and we were contacted on more than one occasion with an order update which was much appreciated!), but when it did arrive was very easy to install. Both the heat and AC function work perfectly, and our family is very happy!

Natalie N. review photo
R
Robert W. (Marietta, GA)
Decent Company

I ordered a HVAC system and it arrived in a timely manner and with no apparent issues. I thought the system was defective once installed but it was the installers fault who wired it wrong. My only issue would be the fee (30% I believe) to return a defective item within the 30 day return policy. If it is defective the customer shouldn't have to pay a fee to return an item that is not operating as designed. Other than that this is a good company.

Robert W. review photo Robert W. review photo
P
Peter K. (Phoenix, AZ)
Pretty Easy Install and Works Great!

Installed my own central HP system. It was a bit of work but nothing beyond a person with basic mechanical and electrical skills. It took me a while because I had to remove the existing electric forced air furnace from a pretty tight place. Some custom sheet metal work and a bit of custom electrical too. Worked perfectly when powered up and I actually like the thermostat provided, although I wish it was clearer how to set up a temperature set-back schedule. Pre-charged refrigerant piping was something new and I liked that too. The best thing is that my electric utility forked out $4,000 and that paid for the unit!

Peter K. review photo Peter K. review photo Peter K. review photo
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