MRCOOL DIY Hyper Heat 12,000 BTU 5th Gen Ductless Mini Split Ceiling Cassette System - 23.5 SEER2, 230V (DIYHH-12-HP-CM-230D25-O)

MRCOOL SKU: DIYHH-12-HP-CM-230D25-O

Choose your location

enter a zip or postal code

Price:
Sale price$3,264.00

Description

MRCOOL DIY 12K BTU 5th Gen Hyper Heat Single Zone Mini Split Ceiling Cassette System - 230V

Get professional heating and cooling that virtually disappears into your ceiling—no contractor needed. The MRCOOL DIY 12K BTU Hyper Heat Ceiling Cassette delivers powerful climate control for 350-550 square feet with whisper-quiet operation and 23.5 SEER2 efficiency that slashes energy costs. While standard heat pumps fail in freezing weather, this system keeps you warm down to -22°F.

Setup is easy enough for any homeowner. The QuickConnect line set comes ready to use—no special equipment or training needed. Just connect the lines, plug it in, and you're done. The DIYPRO cable keeps your electrical connections safe from rain, snow, and animals.

Control it however you want. Change settings with the remote, use the SmartHVAC app on your phone, or just tell Alexa or Google to adjust the temperature. Features like Follow Me, Auto-Restart, Timer, and Sleep Mode work automatically to keep you comfortable.

Your investment is protected. Join the MRCOOL Care Program for lifetime replacement coverage, or get the standard 7-year compressor and 5-year parts warranty when you register online.

 

Ideal For:

  • Large rooms that need even temperatures - Ceiling placement sends air in four directions across 350-550 sq. ft., eliminating hot and cold spots without taking up wall space.
  • Homeowners who want hidden climate control - Unit sits in your ceiling with only a slim vent showing, keeping walls free for furniture and decorations.
  • Areas with brutal winters - Works in temperatures down to -22°F, keeping you warm when other heat pumps quit.
  • Homes near the ocean - Special coating protects against rust from salt air and coastal weather.
  • People who love smart home features - Control everything from your phone or with voice commands through Alexa and Google Assistant.

 

Why Customers Choose The MRCOOL DIY Hyper Heat 12K Ceiling Cassette System

  • Hides in Your Ceiling - Sits flush with ceiling so you barely notice it, while four-way airflow keeps your whole room comfortable.
  • Install It Yourself - Pre-charged lines and simple connections mean you can set it up without calling an HVAC company.
  • Works in Extreme Cold - Keeps heating your space efficiently at -22°F when regular heat pumps stop working.
  • Saves You Money - 23.5 SEER2 rating is one of the best you can buy, cutting your energy costs significantly.
  • Control From Anywhere - Use the remote, your smartphone, or voice commands—whichever is easiest for you.
  • Great Warranty - Get lifetime replacement with the Care Program, or standard 7-year compressor and 5-year parts coverage.

 

Certifications & Warranty

  • Lifetime Replacement Option - Care Program members get a new unit if something major goes wrong with theirs.
  • 7-Year Compressor Protection - The main part that does the heavy work is covered for seven full years.
  • 5-Year Parts Coverage - All the pieces that came with your system are protected for five years.
  • Yearly Maintenance Kit - Care Program sends you filters and cleaning supplies every year to keep it running great.
  • Safety Tested - Intertek laboratory checked it to make sure it's safe and reliable.
  • High Efficiency Certified - 23.5 SEER2 rating means it qualifies for money-back programs from your utility company.
  • Eco-Friendly Approved - R-454B refrigerant is approved by EPA and much better for the environment.
  • Cold Weather Tested - Factory tested to prove it works great down to -22°F outside temperature.
  • Coastal Approved - Gold Fin coating meets standards for homes near the ocean where salt damages equipment.
  • Smart Home Certified - Works with Amazon Alexa and Google Assistant right out of the box.

What's Included

Everything you need is included with your MRCOOL Hyper Heat 12K BTU Single Zone Ceiling Cassette Mini Split System.

  • DIY 5th Gen - R454B - 12K Hyper Heat BTU 230V Condenser w/ 25ft Install Kit
  • MRCOOL DIY Series 5th Gen OuttaSight 12K BTU 230V One-Way Ceiling Cassette
  • 25 ft Pre-Charged R-454B QuickConnect Line Set
  • Remote Control


MRCOOL DIY Hyper Heat 12K BTU Mini Split Ceiling Cassette System Features

  • DIY OuttaSight Ceiling Cassette - Ultra-low-profile design mounts flush in ceiling for virtually invisible climate control with four-way airflow distribution.
  • True DIY Installation Design - Engineered for straightforward ceiling installation without prior HVAC experience or specialized professional equipment.
  • 25-Foot QuickConnect Line Set - Pre-charged with R-454B refrigerant eliminating vacuum pumps and refrigerant handling for hassle-free setup.
  • Eco-Friendly R-454B Refrigerant - Lower Global Warming Potential than R-410A reduces environmental impact while enhancing system efficiency.
  • Weather-Resistant DIYPRO Cable - Replaces traditional electrical conduit with superior protection against weather, pests, and outdoor damage.
  • Multiple Control Options - Wireless remote, SmartHVAC app (iOS/Android), Amazon Alexa, and Google Assistant voice control for ultimate flexibility.
  • Follow Me Temperature Optimization - Adjusts climate control based on remote location ensuring comfort exactly where you are in the room.
  • Humidity Control Dry Mode - Reduces excess moisture and regulates humidity levels for improved indoor air quality and comfort.
  • Gold Fin Corrosion Protection - Specialized condenser coating delivers enhanced durability in coastal and harsh weather environments.
  • Auto-Restart Function - Automatically resumes previous settings after power outages maintaining continuous comfort without manual intervention.
  • Programmable Timer - Schedule operation to match your daily routine for optimized energy efficiency and convenience.
  • Sleep Mode Efficiency - Adjusts temperatures gradually during sleeping hours maximizing comfort while reducing energy consumption.
  • Hyper Heat Performance - Maintains efficient heating operation down to -22°F outdoor temperatures for extreme cold climate reliability.
  • 23.5 SEER2 Energy Rating - Premium efficiency rating delivers substantial energy savings and potential utility rebate eligibility.
  • Whisper-Quiet Operation - Ultra-quiet performance ensures unobtrusive comfort without disrupting conversations, entertainment, or sleep.

MRCOOL DIYHH-12-HP-C-230D25-O Condenser Specs

BRAND NAME MRCOOL
SERIES DIY Hyper Heat
MODEL DIYHH-12-HP-C-230D25-O
GTIN 840255588102
UPC 840255588102
UNIT TYPE Mini-Split
EQUIPMENT TYPE Condenser
SHORT DESCRIPTION DIY 5th Gen - R454B - 12K Hyper Heat BTU 230V Condenser w/ 25ft Install Kit
CFM 1471.5
TONNAGE 1
COOLING CAPACITY (BTU) 12000
HEATING CAPACITY (BTU) 12000
VOLTAGE (V) 208/230
PHASE 1
CYCLE 60
MAX FUSE BREAKER (A) 15
MIN CIRCUIT AMPACITY (A) 15
COLOR White
MAX COVERAGE AREA 550
DECIBEL RATING (DBA) 56.5
DECIBEL RATING LOW (DBA) 21.5
INVERTER Yes
LIQUID LINE SIZE 1/4
SUCTION LINE SIZE 3/8
COMPRESSOR MOTOR TYPE Rotary
CONDENSER FAN MOTOR RPM 780/680/580
METERING DEVICE EEV
UL LISTED Yes
CSA CERTIFIED Yes
ETL CERTIFIED Yes
ENERGY STAR CERTIFIED Yes
AHRI CERTIFIED Yes
REGISTERED WARRANTY 7-Years Compressor, 5-Years Parts
BASE PARTS WARRANTY 5 Years
BASE WARRANTY 5-Years Parts
BASE COMPRESSOR WARRANTY 7 Years
CONTAINS ELECTRONICS Yes
CONTAINS CHEMICALS Yes
CONTAINS COMPRESSED GAS Yes
PROPOSITION 65 WARNING Yes
WORKS WITH DIYCASSETTE12HP-230D25-O DIY-12-HP-WMAH-230D25-O
SEER2 23.5
EER2 12.8
HSPF2-4 10
HSPF2-5 8
REFRIGERANT TYPE R-454B
REFRIGERANT VOLUME (OZ) 32.1
DECIBEL RATING (DBA) 56.5
MIN AMBIENT COOL (F) -22
MIN AMBIENT HEAT (F) -22
LINESET INCLUDED Yes
LINE SET LENGTH 25ft
MAX LINESET LENGTH (FT) 75
RESTRICTED STATES GU;PR;VI
NET DEPTH (IN) 12.99
NET HEIGHT (IN) 21.81
NET WIDTH (IN) 31.69
NET WEIGHT (LBS) 72.31
GROSS DEPTH (IN) 14.57
GROSS HEIGHT (IN) 24.21
GROSS WIDTH (IN) 36.02
GROSS WEIGHT (LBS) 79.59

MRCOOL DIYCASSETTE12HP-230D25-O Air Handler Specs

BRAND NAME MRCOOL
SERIES DIY 5th Gen OuttaSight
MODEL DIYCASSETTE12HP-230D25-O
GTIN/UPC 840255587518
UNIT TYPE Mini-Split
SHORT DESCRIPTION MRCOOL DIY Series 5th Gen OuttaSight 12K BTU 230V One-Way Ceiling Cassette
VOLTAGE (V) 208/230
PHASE 1
CYCLE 60
MOUNT TYPE Ceiling
COLOR White
MAX COVERAGE AREA 550
FILTER TYPE Reusable
FAN ONLY OPTION Yes
QUIET MODE Yes
AUTO COOL Yes
WIFI COMPATIBILITY Yes
APP COMPATIBILITY Yes
WORKS WITH IOS Yes
WORKS WITH ANDROID Yes
REMOTE CONTROL INCLUDED Yes
SLEEP MODE Yes
BASE WARRANTY 5-Year Part/7-Year Compressor
REGISTERED WARRANTY Limited Lifetime Compressor
BASE PARTS WARRANTY 5 Years
BASE COMPRESSOR WARRANTY 7
HAS BATTERIES Yes
CONTAINS ELECTRONICS Yes
CONTAINS CHEMICALS Yes
CONTAINS AEROSOL Yes
CONTAINS COMPRESSED GAS Yes
PROPOSITION 65 WARNING Yes
NET DEPTH (IN) 13.19
NET HEIGHT (IN) 8.98
NET WIDTH (IN) 50.31
NET WEIGHT (LBS) 45
GROSS DEPTH (IN) 22.48
GROSS HEIGHT (IN) 22.64
GROSS WIDTH (IN) 57.6
GROSS WEIGHT (LBS) 88
WORKS WITH DIY 5th Gen Systems
CFM 353 / 312 / 283 / 247 / 177
MAX FUSE BREAKER (A) 15
MIN CIRCUIT AMPACITY (A) 3
RATED LOAD 1
REFRIGERANT TYPE R-454B
DECIBEL RATING (DBA) 37
DECIBEL RATING LOW (DBA) 24
DECIBEL RATING HIGH (DBA) 41
AIR FLOW DIRECTION 1-Way
LIQUID LINE SIZE 1/4
SUCTION LINE SIZE 3/8
BLOWER MOTOR RPM 1075/982/797
REGISTERED COMPRESSOR WARRANTY Limited Lifetime Compressor
BASE COMPRESSOR WARRANTY 7 Years
RESTRICTED STATES GU;PR;VI

Understanding your MRCOOL warranty coverage ensures long-term system performance and protection. All warranties are non-transferable and valid only at the original installation address.

Warranty Coverage by Series

DIY Series 5th Generation Mini-Splits

Models: DIY-09-HP through DIY-36-HP, DIYCASSETTE, DIY-MULTI series

  • Parts: 5 years from proof of purchase
  • Compressor: 7 years from proof of purchase
  • Remote Control: Included in parts warranty
  • Extended Lifetime Warranty: Available with MRCOOL Care Kit Program enrollment (fee required)
  • Installation: Professional installer NOT required when using MRCOOL Quick Connect Pre-Charged Line Set

Advantage Series Mini-Splits

Models: A-09-HP through A-36-HP series

  • Parts: 1 year from proof of purchase
  • Compressor: 2 years from proof of purchase
  • Extended Lifetime Warranty: Available with MRCOOL Care Kit Program enrollment (fee required)

    Must register within 180 days of purchase
    Covers compressor failure only with one-time condenser replacement
    Requires ongoing Care Kit Program maintenance
Easy Pro Series Mini-Splits

Models: EZPRO-09-HP through EZPRO-24-HP series

  • Parts: 1 year from proof of purchase
  • Compressor: 2 years from proof of purchase
  • Extended Lifetime Warranty: Available with MRCOOL Care Kit Program enrollment (fee required)

Central Ducted Systems

Models: CENTRAL-18-HP through CENTRAL-60-HP, MVP Series

  • Parts: 10 years from installation date
  • Compressor: 10 years from installation date
  • Labor: 10 years (installer responsible for first 90 days)
  • Installation: Professional installer NOT required when using MRCOOL Quick Connect Pre-Charged Line Set

Universal Series Split Systems

Models: UHP series, UAH series Air Handlers

  • Parts: 10 years from proof of purchase
  • Compressor: 10 years from proof of purchase
  • Labor: 2 years limited (begins 91 days after purchase, covers diagnostic and repair costs)
  • Installation: Professional installer required

Inverter Package Series

Models: GCSHPM series, GCSCAM series

  • Parts: 10 years from installation date
  • Labor: 5 years limited (manufacturing defects only, begins 91 days after installation)
  • Installation: Professional installation required

Olympus Series Mini-Splits

Models: MDUO, MDUCO, MDUI series

Owner-Occupied Residences:

  • Parts: 5 years standard, 10 years with registration within 60 days
  • Compressor: 5 years standard, 10 years with registration within 60 days

Commercial Applications:

  • Parts & Compressor: 5 years with registration within 60 days
  • Installation: Professional installer required

Key Warranty Conditions

Product Registration:

  • Register at mrcool.com/warranty to activate extended coverage (where applicable)
  • Registration deadlines vary by series (30-180 days from purchase)

Installation Requirements:

  • Must comply with all federal, state, and local electrical codes
  • Must follow MRCOOL installation instructions
  • Must use new, compatible, MRCOOL-approved components
  • Warranty voids if installed with used or incompatible parts

Warranty Does NOT Cover:

  • Labor, diagnostic, shipping, or installation costs (except where labor warranty applies)
  • Normal maintenance (filter cleaning, lubrication, coil cleaning)
  • Refrigerant costs or energy consumption
  • Damage from improper installation, natural disasters, or electrical issues
  • Units moved from original installation address
  • Units installed outside USA and Canada

How to File a Warranty Claim

Contact MRCOOL:

For Labor Claims (Universal/Inverter Package Series within first 2 years):

  • Phone: (844) 518-2040

Required Documentation:

  • Proof of purchase
  • Product registration confirmation (if applicable)
  • Diagnostic testing results (professional HVAC technician may be required)
  • Defective parts must be returned when requested

For complete warranty terms and conditions, visit mrcool.com/warranty

Replacement parts are covered for the remainder of the original warranty period or 30 days, whichever is longer. Some states do not allow exclusion of incidental or consequential damages. This warranty gives you specific legal rights that may vary by state or province.

30-Day Hassle Free Returns Guarantee Icon

Free 30-Day Returns

Confidence Comes Standard: 30-Day Free Returns, Zero Risk - See Full Return Policy Here

MRCOOL DIY Hyper Heat 12,000 BTU 5th Gen Ductless Mini Split Ceiling Cassette System - 23.5 SEER2, 230V (DIYHH-12-HP-CM-230D25-O) Reviews

Customers Who Viewed this Item Bought

Recently viewed

Trusted by Industry Professionals At:

Amazon logo Costco Wholesale logo Walmart logo Best Buy Logo Johnson Controls Logo Raytheon RTX Logo LOCKHEED MARTIN Logo GDIT Logo General Atomics Logo BASF Logo TSMC Logo Mayo Clinic Logo Kinder Morgan Logo 10x GENOMICS Logo United States House of Representatives Seal of the United States Coast Guard Logo US Air Force Logo National Gallery of Art logo UNC Health Logo UPMC Logo Vallen Promedica University of Washington Seal Logo UC Davis Logo Jack Henry Associates Logo Fastenal Logo CBRE Group Logo Packaging Corporation of America Logo Hampton by Hilton Logo fairfield inn by marriott logo Taos logo zerorez logo smartbank logo the walsh group logo Fleischmann's Yeast

“From top-notch customer service and clear communication about order status to the quality and reliability of the cleaning equipment - everything exceeded my expectations.”

- Andrew S., Facility Manager, 03/26
All Customer Reviews