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MRCOOL DIY Hyper Heat 18,000 BTU 5th Gen Ductless Mini Split Ceiling Cassette System - 21.2 SEER2, 230V (DIYHH-18-HP-CM-230D25-O)

Name: MRCOOL DIY Hyper Heat 18,000 BTU 5th Gen Ductless Mini Split Ceiling Cassette System - 21.2 SEER2, 230V (DIYHH-18-HP-CM-230D25-O)
Brand: MRCOOL
SKU: DIYHH-18-HP-CM-230D25-O
Price: 3682.00 USD
Availability: InStock

MRCOOL SKU: DIYHH-18-HP-CM-230D25-O

Price:

$3,682.00

Quantity:

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MRCOOL DIY 18K BTU 5th Gen Hyper Heat Single Zone Mini Split Ceiling Cassette System - 230V

Heat and cool larger spaces with a system that disappears into your ceiling. The MRCOOL DIY 18K BTU Hyper Heat Ceiling Cassette delivers 18,000 BTU of power for rooms up to 800 square feet, with four-way airflow that reaches every corner. The 21.2 SEER2 rating keeps your energy costs down while maintaining perfect comfort year-round.

Installation is straightforward for any DIY homeowner. The QuickConnect system arrives pre-filled with refrigerant—just connect the lines and power it up. No vacuum pumps, no certifications, no headaches. The DIYPRO cable handles your electrical connection with built-in protection from weather and pests.

Take control your way. Adjust temperature with the wireless remote, manage settings through the SmartHVAC app, or use voice commands with Alexa or Google. Smart features like Follow Me, Auto-Restart, and Sleep Mode work behind the scenes to maximize comfort and savings.

Protection that lasts. The MRCOOL Care Program offers lifetime replacement coverage and annual maintenance kits, while standard registration gives you 7-year compressor and 5-year parts warranties.

Best For:

Larger open spaces up to 800 sq. ft. - More powerful 18,000 BTU output handles bigger family rooms, open kitchens, and master suites with ease.
Rooms with high ceilings or vaulted designs - Ceiling cassette placement pushes air downward and outward, reaching all areas even in tall spaces.
Homes in harsh winter climates - Hyper Heat keeps warming efficiently at -22°F, perfect for northern regions with brutal cold snaps.
Coastal properties facing corrosion - Gold Fin coating stands strong against salty ocean air that ruins ordinary HVAC equipment.
Households wanting invisible HVAC - Flush ceiling design keeps walls completely clear for windows, art, and furniture placement.

Why Customers Choose The MRCOOL DIY Hyper Heat 18K Ceiling Cassette System

More Power for Bigger Rooms - 18,000 BTU capacity handles spaces up to 800 square feet that smaller units can't cover.
Disappears Overhead - Ceiling cassette mounts flush so only a decorative grille shows while four vents distribute air everywhere.
DIY Without Professional Help - Pre-filled lines and simple connections let you complete installation in one weekend without contractors.
Extreme Cold Performance - Keeps heating down to -22°F while standard heat pumps fail and switch to expensive backup heat.
Excellent Energy Savings - 21.2 SEER2 rating delivers outstanding efficiency that cuts monthly bills compared to older systems.
Flexible Control Options - Remote, smartphone app, and voice assistants give you multiple ways to adjust comfort instantly.

Certifications & Warranty

Lifetime System Replacement - Care Program enrollment provides complete unit replacement if major failure occurs during ownership.
Extended Compressor Warranty - Seven years of coverage protects the most expensive component from defects and failures.
Long-Term Parts Protection - Five-year warranty covers every included component against manufacturing defects and breakdowns.
Annual Maintenance Package - Care Program members receive yearly supplies for proper cleaning and upkeep of system.
Independent Safety Testing - Intertek certification confirms product meets established electrical and mechanical safety requirements.
Energy Star Level Efficiency - 21.2 SEER2 meets government standards for high-efficiency HVAC qualifying for rebate programs.
Environmental Refrigerant Approval - R-454B refrigerant certified by EPA with reduced greenhouse gas impact versus older types.
Subzero Operation Verified - Factory testing confirms reliable heating performance down to -22°F ambient outdoor conditions.
Corrosion Resistance Certified - Gold Fin coating validated for installations within 10 miles of saltwater and marine environments.
Voice Assistant Compatible - Official integration with Amazon Alexa and Google Assistant smart home platforms confirmed.

What's Included

Everything you need is included with your MRCOOL Hyper Heat 18K BTU Single Zone Ceiling Cassette Mini Split System.

DIY 5th Gen - R454B - 18K Hyper Heat BTU 230V Condenser w/ 25ft Install Kit
MRCOOL DIY Series 5th Gen OuttaSight 18K BTU 230V One-Way Ceiling Cassette
25 ft Pre-Charged R-454B QuickConnect Line Set
Remote Control

MRCOOL DIY Hyper Heat 18K BTU Mini Split Ceiling Cassette System Features

Flush Ceiling Installation - Integrates seamlessly into ceiling with minimal profile, distributing air through four directional vents.
Homeowner Installation Friendly - Complete setup using basic tools and clear instructions without HVAC training or licenses.
Ready-to-Install Line Set - 25-foot refrigerant lines come factory-charged so you avoid complicated evacuation procedures.
Eco-Smart Refrigerant - R-454B has significantly lower environmental impact than traditional refrigerants while boosting performance.
Heavy-Duty Power Cable - DIYPRO construction resists moisture, sunlight, and animal damage better than standard electrical wire.
Multiple Control Methods - Handheld remote, mobile app, Alexa voice control, and Google Assistant compatibility all included.
Location-Based Comfort - System senses temperature at remote position and adjusts to keep you comfortable wherever you sit.
Humidity Management - Dry Mode pulls excess moisture from air on sticky days while maintaining comfortable temperatures.
Ocean-Proof Protection - Factory-applied Gold Fin treatment prevents rust and corrosion in salty coastal environments.
Power Outage Recovery - Automatically returns to previous settings when electricity comes back after storms or outages.
Programmable Scheduling - Set daily on/off times to match your routine and avoid heating or cooling empty rooms.
Nighttime Energy Saver - Sleep function gradually adjusts overnight temperatures for better rest and lower power usage.
Arctic Performance - Engineered to maintain heat output at -22°F outdoor temperature when competitors shut down.
Premium Efficiency - 21.2 SEER2 certification qualifies for utility rebates and represents excellent energy performance.
Whisper-Quiet Operation - Ceiling position and sound insulation minimize noise during operation for peaceful environments.

MRCOOL DIYHH-18-HP-C-230D25-O Condenser Specs

BRAND NAME	MRCOOL
SERIES	DIY Hyper Heat
MODEL	DIYHH-18-HP-C-230D25-O
GTIN	840255588096
UPC	840255588096
UNIT TYPE	Mini-Split
EQUIPMENT TYPE	Condenser
SHORT DESCRIPTION	DIY 5th Gen - R454B - 18K Hyper Heat BTU 230V Condenser w/ 25ft Install Kit
CFM	1765.8
TONNAGE	1.5
COOLING CAPACITY (BTU)	18000
HEATING CAPACITY (BTU)	18000
VOLTAGE (V)	208/230
PHASE	1
CYCLE	60
MAX FUSE BREAKER (A)	25
MIN CIRCUIT AMPACITY (A)	19
COLOR	White
MAX COVERAGE AREA	800
DECIBEL RATING (DBA)	58
INVERTER	Yes
LIQUID LINE SIZE	1/4
SUCTION LINE SIZE	1/2
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	DIYCASSETTE18HP-230D25-O DIY-18-HP-WMAH-230D25-O
SEER2	21.2
EER2	12.5
HSPF2-4	11
HSPF2-5	8.5
REFRIGERANT TYPE	R-454B
REFRIGERANT VOLUME (OZ)	52.21
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)	13.46
NET HEIGHT (IN)	26.5
NET WIDTH (IN)	35.04
NET WEIGHT (LBS)	99.87
GROSS DEPTH (IN)	18.11
GROSS HEIGHT (IN)	29.53
GROSS WIDTH (IN)	40.55
GROSS WEIGHT (LBS)	120.15

MRCOOL DIYCASSETTE18HP-230D25-O Air Handler Specs

BRAND NAME	MRCOOL
SERIES	DIY 5th Gen OuttaSight
MODEL	DIYCASSETTE18HP-230D25-O
GTIN/UPC	840255587525
UNIT TYPE	Mini-Split
SHORT DESCRIPTION	MRCOOL DIY Series 5th Gen OuttaSight 18K BTU 230V One-Way Ceiling Cassette
VOLTAGE (V)	208/230
PHASE	1
CYCLE	60
MOUNT TYPE	Ceiling
COLOR	White
MAX COVERAGE AREA	800
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 Years
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	400 / 352 / 300 / 207 / 207
MAX FUSE BREAKER (A)	15
MIN CIRCUIT AMPACITY (A)	3
RATED LOAD	1
REFRIGERANT TYPE	R-454B
DECIBEL RATING (DBA)	41.5
DECIBEL RATING LOW (DBA)	26
DECIBEL RATING HIGH (DBA)	44
AIR FLOW DIRECTION	1-Way
LIQUID LINE SIZE	1/4
SUCTION LINE SIZE	1/2
BLOWER MOTOR RPM	1024
REGISTERED COMPRESSOR WARRANTY	Limited Lifetime Compressor
RESTRICTED STATES	GU;PR;VI
COOLING CAPACITY (BTU)	18800
HEATING CAPACITY (BTU)	22700

MRCOOL DIY Hyper Heat 18,000 BTU 5th Gen Ductless Mini Split Ceiling Cassette System - 230V Resources

Brochure

Condenser Installation Manual

Warranty Information

Specification Sheet

Remote Manual

Smart Controller Manual

AHRI Certificate

Energy Guide

Ceiling Cassette Manual

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:

Phone: (270) 366-0457
Email: support@mrcool.com
Online: mrcool.com (create support ticket)

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.

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MRCOOL DIY Hyper Heat 18,000 BTU 5th Gen Ductless Mini Split Ceiling Cassette System - 21.2 SEER2, 230V (DIYHH-18-HP-CM-230D25-O)

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