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MRCOOL Olympus Hyper Heat 18,000 BTU Mini Split Heat Pump
MRCOOL Olympus Hyper Heat 18,000 BTU Mini Split Heat Pump
MRCOOL Olympus Hyper Heat 18,000 BTU Mini Split Heat Pump
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MRCOOL Olympus Hyper Heat 18,000 BTU Mini Split Heat Pump

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Product Overview

Quiet, efficient and powerful, this MRCOOL Oasis Hyper Heat is designed for tough conditions. Packed with features and operating modes, the MRCOOL 18,000 BTU Mini Split is ideal for spaces up to 1,000 square feet. It’s commonly used in home additions, greenhouses, basements and much more. 

Heat and Cooling in Tough Climates

Many mini splits are designed for mild climates, but the MRCOOL Oasis Hyper Heat stands up to the toughest environments. Its heat function keeps you warm and cozy even as winter weather blasts through, and it can cool rooms down to 5 degrees F. 

These extremes make this not only a popular option for homes but also for server rooms, greenhouses and other commercial spaces that need cooling or heating. 

Blends Power, Control & Efficiency

  • Save on Energy Costs: This MRCOOL 18,000 BTU mini-split is Energy Star rated for its efficient operation. Instead of running energy-wasting room ACs and heaters, add this long-term option for year-round comfort. Its 20 SEER rating makes it one of the most efficient mini-splits available and proves you’ll save on heating and cooling every month. It costs an average of just $67 annually to cool. 
  • Smartphone App and Voice Control: Control your comfort from anywhere with this wi-fi-enabled cooling and heating system. Compatible with Android and Apple devices, you can adjust any setting from any location. Additionally, it fully supports Google Assistant and Amazon Alexa. Get the app: iTunes, Google Play.
  • Near-Silent Comfort: Loud compressors can interrupt your daily activities, but just the air blower is housed in the room this model keeps comfortable. It will effectively, and importantly quietly, adjust your room’s temperature as needed.
  • Powerful Cooling and Heating: While this model is efficient, it’s powerful enough to heat and cool large rooms up to 650 square feet. It also offers fan-only and Auto modes. When you turn it to Auto mode, this mini split automatically selects heat, cool, or fan-only based on your set temperature and current ambient temperature.  

Line Sets Included

This unit is available with 16-foot, 25-foot, or 50-foot line set kits, which connect the indoor air blower to the outdoor compressor. This versatility allows for use in basements or second floors. Most brands require you to purchase these separately, saving you even more money. 

Additional Features

  • Follow Me Function: Worried about cool or warm air spreading evenly across your room? Keep the remote control close by, and this unit will adjust based on the temperature around the remote control. This ensures maximum comfort. 
  • Auto Restart: Don’t worry about power outages. The MRCOOL 18,000 BTU Oasis Hyper Heat turns back on to your previous settings once power is restored. 
  • Programmable Timer: Save energy and ensure your space stays comfortable when needed by setting this model to turn on or turn off automatically based on a schedule you set. 
  • Auto-Swinging Louvers: Direct air right where you need it most or turn on the swinging louvers to distribute air across your room evenly. 
  • Sleep Mode: Program this mode for quiet, money-saving comfort while you sleep. 
  • Louver Position Memory: Your louvers will move to the same position as you set last time once you turn the unit on. 
  • Leak Detection: If low coolant is detected during operation, an alarm will sound to alert you to check for leaks. This protects the compressor as you stay cool. 
  • Gold Fin Condenser: The condenser is built to resist long-term corrosion - even near the ocean.


Keep residential and light commercial areas up to 1,000 square feet comfortable all year with this impressive mini split. 

What Customers Love

  • Extreme Conditions: Few mini splits can heat as adequately or cool down to 5 degrees F like this one. It makes this a top choice for commercial spaces like greenhouses. 
  • Efficient Mini Split: All mini splits save money over time, but this Energy Star model offers a higher SEER (20) than comparable models, ensuring it’s an efficient and money-saving option. 

Things to Consider

  • Professional Installation: Installation must be performed by an authorized technician.


Number of Zones 1
Recommended Coverage Area 1,000 sq. ft.
Energy Efficiency Ratio (EER) 12.5
Seasonal Energy Efficiency Ratio (SEER) 20
Compatible Wireless Devices Alexa, Google Assistant, App
Safety Certifications ETL, UL
Heating Seasonal Performance Factor (HSPF) 10.3
Installation Type Professional Installation
Estimated Yearly Operating Cost Cool - 107; Heat - 353
AHRI Estimated Annual Cooling Cost $106.00
AHRI Estimated Annual Heating Cost $362.00
Energy Star Yes
Wi-Fi Capable Yes
Total Cooling Capacity 17,000 BTUs
Total Heating Capacity 18,000 BTUs
Automatic Mode Yes
Maximum Cubic Feet per Minute (CFM) 599 CFM
Fan-Only Mode Yes
Number of Fan Speeds 4
Minimum Operating Temperature - Cooling 5 degrees F
Maximum Operating Temperature - Cooling 122 degrees F
Heat Mode Yes
Minimum Operating Temperature - Heating 5 degrees F
Maximum Operating Temperature - Heating 86 degrees F
Maximum Line Length 98.5 ft.
Dehumidifier Mode Yes
Compressor Type Inverter
Outdoor Unit Height 27.64 in.
Outdoor Unit Width 33.27 in.
Outdoor Unit Depth 14.29 in.
Outdoor Unit Weight 107.4 lbs.
Mounting Type Wall
Indoor Unit Height 12.4 in.
Indoor Unit Width 38.98 in.
Indoor Unit Depth 8.58 in.
Indoor Unit Weight 26.89 lbs.
Maximum Height Difference 66 ft.
Remote Control Yes
Programmable Timer Yes
Auto-Restart Yes
Refrigerant Type R-410A
Minimum Indoor Noise Level 26.5 dB
Maximum Indoor Noise Level 45.5 dB
Refrigerant Connection Type Flare
Line Length
  • 16 ft. Line Set: 16 ft.
  • 25 ft. Line Set: 25 ft.
  • 50 ft. Line Set: 50 ft.
Line Set Included Yes
Liquid Line O.D. .25 in.
Suction Line O.D. .50 in.
Air Filter Yes
Adjustable Louvers Yes
Automatic Oscillation Yes
Maximum Heating Amperage 18 Amps
Voltage 220-240 V
Color White

Manufacturer's Warranty

7-Year Limited Compressor Warranty, 5-Year Limited Parts Warranty

Info & Guides

What's In The Box?

  • MRCOOL 18,000 BTU Mini Split Heat Pump
  • Owner's Manual
  • Line Set Kit
  • Remote Control