MRCOOL — DIY Hyper Heat 5th Gen + OuttaSight® One-Way Cassette
MRCOOL® DIY® Hyper Heat 18K System (One-Way Ceiling Cassette) — DIYCASSETTE18HP-230D25-O + DIYHH-18-HP-C-230D25-O
Overview
18K ClassHyper Heat21.2 SEER2R-454B25ft QuickConnect® Line SetOuttaSight® 1-Way CassetteFlush Ceiling InstallWiFi + SmartHVAC AppAlexa / Google AssistantENERGY STAR®
TheMRCOOL® DIY® Hyper Heat 18Kpaired with theDIY® OuttaSight® one-way ceiling cassettedelivers discreet, high-performance comfort for spaces up to800 sq. ft.Installation is streamlined with a25-foot QuickConnect® line setpre-charged withR-454B. Control options include the included remote, theSmartHVAC app(iOS/Android), andAmazon Alexa/Google Assistant.
Highlights
- Low-profile ceiling design:One-way cassette fits between16" joistsfor a clean, flush look.
- DIY-friendly hookup:QuickConnect® line set ispre-chargedto simplify commissioning.
- Cold-weather capability:Minimum ambient listed as-22°Ffor both heating and cooling.
- Smart control:Remote + SmartHVAC app + Alexa/Google voice control.
- Durability:Gold Fin® condenser coating supports corrosion resistance.
Coverage
Up to 800 sq ft
Up to 800 sq ft
Efficiency
Up to 21.2 SEER2
Up to 21.2 SEER2
Line Set
25 ft included
25 ft included
Min Ambient
-22°F (Heat/Cool)
-22°F (Heat/Cool)
Coverage varies by climate, insulation, and load. Sizing by Manual J is recommended.
What’s Included
- Ceiling Cassette (1-Way):DIYCASSETTE18HP-230D25-O
- Outdoor Condenser:DIYHH-18-HP-C-230D25-O
- QuickConnect® Line Set:25 ft (pre-charged R-454B)
- DIYPRO® Cable
- Wireless Remote Control
- Documentation (see Documents & Downloads)
Indoor Specs
Model:DIYCASSETTE18HP-230D25-O (DIY® Series 5th Gen OuttaSight® 1-Way Ceiling Cassette)
| Mount Type | Ceiling • 1-Way Airflow |
| Max Coverage | Up to 800 sq ft |
| Cooling / Heating Capacity | 18,800 BTU / 22,700 BTU |
| Airflow (CFM) | 400 / 352 / 300 / 207 / 207 |
| Sound | 41.5 dB(A) (Low 26 • High 44) |
| WiFi / App | Yes / Yes (SmartHVAC) |
| Voice Control | Amazon Alexa / Google Assistant |
| Electrical | 208–230V • 1-Phase • 60 Hz |
| Max Fuse / Breaker | 15A |
| Min Circuit Ampacity | 3A |
| Refrigerant | R-454B |
| Line Sizes | Liquid 1/4" • Suction 1/2" |
| Filter | Reusable |
| Dimensions (W×D×H) | 50.31" × 13.19" × 8.98" |
| Weight | 45 lb |
| GTIN / UPC | GTIN 00840255587525 • UPC 840255587525 |
| Restricted States | GU; PR; VI |
| Proposition 65 | Yes |
Indoor rated capacities are listed at 18,800 BTU cooling and 22,700 BTU heating.
Outdoor Specs
Model:DIYHH-18-HP-C-230D25-O (DIY® Hyper Heat Condenser)
| Cooling / Heating Capacity | 18,000 BTU / 18,000 BTU |
| SEER2 / EER2 | 21.2 / 12.5 |
| HSPF2-4 / HSPF2-5 | 11.0 / 8.5 |
| Inverter | Yes |
| Sound | 58 dB(A) |
| Minimum Ambient (Cooling) | -22°F |
| Minimum Ambient (Heating) | -22°F |
| Electrical | 208–230V • 1-Phase • 60 Hz |
| MCA / Max Breaker | 19A / 25A |
| Refrigerant | R-454B • 52.21 oz |
| Line Set Included | Yes • 25 ft |
| Max Line Set Length | 75 ft |
| Line Sizes | Liquid 1/4" • Suction 1/2" |
| Compressor | Rotary |
| Metering Device | EEV |
| Dimensions (W×D×H) | 35.04" × 13.46" × 26.5" |
| Weight | 99.87 lb |
| GTIN / UPC | GTIN 00840255588096 • UPC 840255588096 |
| Restricted States | GU; PR; VI |
| Proposition 65 | Yes |
Documents & Downloads
- OuttaSight® Cassette (DIYCASSETTE18HP-230D25-O)
- Brochure (EN)
- Installation & User Manual (EN)
- Performance / Specs (EN)
- Remote Manual (EN)
- Service Manual (EN)
- Warranty (EN)
- AHRI Certificate (PDF)
- EnergyGuide (PDF)
- DIY Hyper Heat Condenser (DIYHH-18-HP-C-230D25-O)
- Brochure (EN)
- Installation & User Manual (EN)
- Performance / Specs (EN)
- Warranty (EN)
- AHRI Certificate (PDF)
- EnergyGuide (PDF)
Important
- Line set:25 ft QuickConnect® line set included; maximum line set length is listed as75 ft.
- Electrical:208–230V, 1-phase, 60 Hz (verify breaker sizing per installation manual and local code).
- Cold-weather operation:Minimum ambient listed as-22°Ffor both heating and cooling.
FAQs
What makes the OuttaSight® cassette different from a standard ceiling cassette?
It’s aone-wayceiling cassette designed to fit between16" joistsfor a flush, low-profile install and targeted airflow without using wall space.
Does it support app and voice control?
Yes. It supports theSmartHVACapp (iOS/Android) and Amazon Alexa / Google Assistant voice control, plus the included remote.
How cold can it operate?
Minimum ambient heating and cooling are both listed as-22°F.
What line sizes does it use?
Line sizes are listed as1/4" liquidand1/2" suction.
What warranty coverage is included?
Warranty is listed as7-year compressorand5-year partswith registration, with additional limited compressor coverage referenced for the DIY series.
