Pioneer® 18,000 BTU 21 SEER 230V Ductless Mini-Split Air Conditioner Heat Pump System Full Set

Model Number: WYS018GMFI22RL-10

Limited Time Offer!

  1. Free Shipping within the Continental US
  2. Pre-Charged with R410A for line lengths up to 25 ft long
  3. Various Installation Kit Options Available (See Below)
  4. Includes Free Flare Connection Leak Guard Sealer
  5. Wholesale Price Directly from Factory
  • $1,343.00
  • Save $227


  • Ultra High Efficiency Inverter++ ductless mini split heat pump system
  • Cooling capacity: 18,000 BTU/H with 20.8 SEER efficiency
  • Heating capacity: 18,000 BTU/H with 10 HSPF efficiency
  • Voltage: 208~230 V, 60 Hertz, 1Ph
  • High Wall Mounted Air Conditioning & Heating System
  • Variable Speed DC Inverter Operation Mode
  • Customizable length copper line set with flare connections
  • AHRI Estimated Annual Operating Costs: 
    • Cooling: $110.00
    • Heating: $366.00


R410A Pre-Charged Outdoor Unit, accommodating refrigerant line lengths up to 25 ft. per circuit.


The installation kit is necessary for the system to function. Do not select the "Without Installation Kit" option from the dropdown unless you are providing one yourself. The installation kit is: copper refrigeration lines, communication wire between indoor and outdoor unit, 10 ft drain hose, wall cap, sleeve, and putty.

High Wall Mounted Ductless Mini Split

Mini Split Wall Mount Inverter+ and Inverter++ Series

At Pioneer Mini Split, we offer variable capacity ductless wall-mount mini split systems, available with different efficiency ratings and in a variety of capacities for simple installation and great single-zone comfort. A convenient remote controller conveys cooling, heating, dehumidification, and ventilation requests to the wall-mount ductless mini split system, while automatic air-sweeping louvers, automatically varying air flow, and capacity adjustments keep the zone at the ultimate comfort level. This results in minimal electrical consumption. Check out our selection of AC mini split wall mounts today!

More details about Pioneer® WYS Series

What's Included

  • Indoor Unit
  • Outdoor Unit
  • Wireless Remote Control
  • Various Installation Kit Options Available
  • Flare Connection Leak Guard Sealer
  • Installation Manual
  • User’s Manual
  • Manufacturer Warranty

Our Guarantee

  • 5 year parts limited warranty
  • 5 year compressor limited warranty


  • Sleep Mode
    The function enables the air conditioner to automatically increase cooling or decrease heating 1°C per hour for the first two hours, then holds steady for the next 5 hours, after that it will switch off. This function maintains both energy savings and comfort at night.
  • Temperature Compensation
    Temperature compensation function eliminates the difference in temperature between the floor and ceiling by mixing the different layers of air. Consequently, the time for cooling the room is reduced, and a cold offset rising stream of warm air by stirring.
  • Refrigerant Leakage Detect 
    Indoor unit shows error code "EC" and stops automatically when refrigerant leakage is detected. This protects the compressor from high temperature damage due to refrigerant leakage.
  • Anti-cold Air Function 
    Indoor fan speed is regulated automatically from the lowest grade to the setting grade according to evaporator temperature when the unit just starts heating operation. This function can prevent cold air blowing out to avoid discomfort to the users.
  • Emergency start
  • Low Ambient Cooling 
    With built-in low ambient kit or special designed PCB, outdoor fan speeds can be changed automatically according to condensation temperature. The air conditioner can run cooling operation even when the outdoor ambient temperature is down to -15°C.
  • 1W Standby 
    Intelligent on-off technology enables Pioneer products automatically  enter energy-saving mode when standby, cut energy consumption from normal 5W to 1W or 0.5W per hour which counts 80%~90% of saving.
  • 2-way Draining 
    Both left and right sides of the indoor unit are possible for outstretch of connective piping and drainage hose for easy installation.
  • Follow Me (Remote Thermostat) 
    Temperature sensor built in the remote controller will sense it’s surrounding temperature. The unit will adjust the room temperature more accurately to give you comfort.
  • 46°F Heating
    In heating operation, the preset temperature of the air conditioner can be as low as 46°F, which keeps the room temperature steady at 46°F and prevents the house from freezing when it is unoccupied for a long time in severe cold weather.
  • Chassis Heating Belt
    Heating belt is fitted on the base plate of the outdoor unit to prevent defrosting water accumulation, which improves heat transfer efficiency.


  • High Density Filter
    Compared with ordinary dust filter, the anti-dust effect of this high density filter can increase more than 50%, it can clean dust, pollen up to 80%.
  • Wireless Control
    With the Wireless control, you can easily turn off each indoor unit that it is paired, outside your home via your smart phone. Furthermore, you can turn it on before you come back.
  • Remote in Engineer Mode


Pioneer Mini Split Certifications

Performance Data

  • Power Supply: 208~230V, 60Hz, 1Ph
  • Cooling Rated Capacity: 18,000 BTU/h
  • Cooling Capacity Range: 7,592~24,806 BTU/h
  • Cooling SEER: 20.8 BTU/w
  • Heating Rated Capacity: 18,000 BTU/h
  • Heating Capacity Range: 7,592~24,806 BTU/h
  • Heating HSPF: 10.0 BTU/w
  • Refrigerant Type: R410a
  • Suitable Area: 450~650 Sq.F

Indoor Unit Data

  • Air Flow (Hi/Med/Lo): 559 / 365 / 306 CFM
  • Sound Level (Hi/Lo): 45.5 / 34.5 dB(A)
  • Net Dimensions (WDH): 42.5 x 8.8 x 13.2 Inches
  • Carton Dimensions (WDH): 45.5 x 12.3 x 16.3 Inches
  • Net / Gross Weight: 29 / 37 Lbs

Outdoor Unit Data

  • Sound Level: 61.0 dB(A)
  • Net Dimensions (WDH): 33.3 x 14.4 x 27.6 Inches
  • Carton Dimensions (WDH): 38.0 x 15.5 x 29.7 Inches
  • Net / Gross Weight: 101 / 108 Lbs


Ask a Question
  • Which 18000 unit will still work without freezing up in below freezing temps?

    Yes, this system will continue heating down to -13°F outside temperatures in heating mode.

  • Can a second zone be added later?

    No, for that you would need to shop for Multi-Zone systems:

  • What size wire do I need and what size beaker for this unit?

    This would take a 20A double-pole breaker. The corresponding wire would be 12 AWG, with 2 hots and a ground, no neutral.

  • What gauge wire is required from the main electrical panel to the disconnect box. 10-2 or 10-3?

    It would need a 20A double-pole breaker and 12 AWG wire (2 hots+ground, no neutral).

  • What are the copper pipe diameters if I want to pre-order for in wall installation

    This system uses 1/4" and 1/2" size copper pipes.

  • What gauge wire is required for the 18000 mini split?

    This system would take a 20A double-pole breaker with 12 AWG wire. 2 hots and a ground, no neutral.

  • What diameter hole should be drilled through the wall for the drain and tubing?

    A 2.5" wall hole would be sufficient.

  • How many square feet would this unit efficiently heat/cool?

    This system is recommended to manage spaces between 400 and 700 square feet.

  • What size circuit breaker is needed for the 18000 BTU unit 208/230 volt single phase. Is it a double pole 15 or 20 amp.

    Either is acceptable but we recommend 15A.

  • Can the outside unit be mounted on the wall?

    Yes it can, you can use one of our wall-mounting brackets.

  • Hello, I am looking at purchasing the 18,000 BTU Unit. If I purchase the 10 foot line rather than the 16 foot line will I need to remove some refrigerant and flare the line? Thanks

    The amount of pre-charge is optimized for 16 ft, but any run between 5 and 25 ft will not require adjustment of the refrigerant levels. The 10 foot line will come pre-flared as well.

  • How many amps to start and to run 18k btu wondering if it would run less amps once room is cooled

    This system is rated 6.1A in cooling and 6.8A in heating. It is a soft-start system and the current does drop as the set temperature is reached since the compressor will shut off and only the indoor fan motor will keep running.

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