Description
MRCOOL Olympus 18K BTU 1.5 Ton Ceiling Cassette Air Handler ONLY — CASSETTE18HP-230C-P-O
Professional-Grade Ceiling Cassette for Discreet, 360° Airflow Distribution
The MRCOOL Olympus 18K BTU 1.5 Ton Ceiling Cassette Air Handler (CASSETTE18HP-230C-P-O) delivers exceptional ductless climate control with a sleek, flush-mount ceiling installation that virtually disappears into any space. As part of the Olympus series — MRCOOL's professional-grade ductless line — this ceiling cassette provides 360° airflow distribution for even temperature throughout spaces up to 750 square feet.
Designed for commercial and residential applications where wall space is limited or aesthetics are paramount, the Olympus Cassette pairs with compatible Olympus single-zone or multi-zone condensers. Factory pre-charged with R-454B refrigerant — a next-generation, low-GWP alternative to R-410A — this unit meets current environmental standards. Professional installation by a licensed HVAC technician is required.
Technical Specifications
| Specification | Value |
|---|---|
| Model / SKU | CASSETTE18HP-230C-P-O |
| Series | Olympus 4th Gen Ceiling Cassette |
| Type | Air Handler ONLY — Ceiling Cassette Ductless |
| Capacity | 18,000 BTU |
| Tonnage | 1.5 Ton |
| Coverage Area | 500–750 sq ft |
| Airflow Pattern | 360° Multi-Directional |
| Refrigerant | R-454B |
| Voltage | 208-230V / 60Hz |
| Max Breaker | 15A |
| Min Circuit Ampacity | 3A |
| Sound Level (Indoor) | 48 dB |
| Dimensions | 22.44" W x 22.44" D x 9.65" H |
| Net Weight | 35.27 lbs (16.0 kg) |
| Liquid Line | 1/4" |
| Suction Line | 1/2" |
| Mount Type | Ceiling Recessed |
| WiFi / App | Yes — MRCOOL Smart HVAC App |
| Smart Home | Amazon Alexa, Google Assistant |
| Remote Control | Included |
| Certifications | UL Listed, ETL Listed, CSA Listed |
| Warranty | 5-Year Parts |
Product Tips
- Air Handler ONLY: This listing is for the indoor ceiling cassette unit only. A compatible Olympus condenser (sold separately) is required to complete the system.
- Ceiling Cutout Required: Installation requires a ceiling cutout of approximately 22" x 22". Ensure adequate plenum space above the ceiling for the cassette body (approximately 10" depth).
- Professional Installation Required: The Olympus series requires licensed HVAC installation. Proper vacuum, nitrogen testing, and refrigerant charging must be performed by a certified technician.
- 360° Airflow: The cassette design provides even air distribution in all four directions, making it ideal for open floor plans, conference rooms, and commercial spaces.
- R-454B Refrigerant: Uses next-generation R-454B refrigerant. Ensure your technician is certified for R-454B handling.
Frequently Asked Questions
Is this a complete system or just the air handler?
This is the ceiling cassette air handler (indoor unit) only. You will need a compatible Olympus condenser (outdoor unit) to complete the system. The condenser is sold separately.
What ceiling cutout size is required?
The cassette requires a ceiling cutout of approximately 22" x 22" with at least 10" of plenum depth above the ceiling for the cassette body. A decorative panel is included to cover the ceiling opening.
Does this require professional installation?
Yes. The Olympus series is a professional-grade system requiring a licensed HVAC technician. Refrigerant handling requires EPA Section 608 certification. DIY installation voids the warranty.
What refrigerant does this unit use?
Uses R-454B refrigerant — a next-generation, lower-GWP alternative to R-410A. The system is pre-charged at the factory.
What size room can this cool or heat?
The 18K BTU unit is designed for approximately 500–750 sq ft, depending on insulation, climate zone, and ceiling height.
Does this unit have WiFi?
Yes. This air handler includes built-in WiFi and is compatible with the MRCOOL Smart HVAC app for iOS and Android. It also works with Amazon Alexa and Google Assistant.
What electrical requirements are needed?
Requires a dedicated 15A circuit breaker at 208-230V. Minimum circuit ampacity is 3A.
What is the warranty?
5-Year Parts Warranty when registered within 30 days of installation by a licensed HVAC contractor.
Can this be used in cold climates?
When paired with a compatible Olympus heat pump condenser, the system can operate in heating mode. Check the condenser's minimum operating temperature for cold climate suitability.
What accessories are compatible?
Compatible with MRCOOL Non-DIY line sets, MRCOOL Smart Wi-Fi Mini Stat, and MRCOOL Condenser Wall Mounting Kits for the outdoor unit.
Compatible Accessories
| Accessory | Purpose |
|---|---|
| MRCOOL Mini Split Line Set | Connects indoor cassette to outdoor condenser |
| MRCOOL Condenser Wall Mounting Kit | Secure outdoor condenser mounting |
| MRCOOL Smart Wi-Fi Mini Stat | Advanced thermostat control |
| MRCOOL LineGuard | Line set protection and aesthetics |
Need help selecting the right condenser or accessories?
Contact our HVAC specialists for expert guidance on system configuration, sizing, and installation requirements.
Warranty Information
The MRCOOL Olympus Ceiling Cassette is covered by a 5-Year Parts Warranty when properly registered within 30 days of installation by a licensed HVAC contractor. Keep your installation documentation and AHRI certification number for warranty claims.
