Pioneer® 12,000 BTU 21.4 SEER2 Ductless Mini-Split Inverter+ Air Conditioner Heat Pump System Full Set 230V

Pioneer® 12,000 BTU 21.4 SEER2 Ductless Mini-Split Inverter+ Air Conditioner Heat Pump System Full Set 230V
Pioneer® 12,000 BTU 21.4 SEER2 Ductless Mini-Split Inverter+ Air Conditioner Heat Pump System Full Set 230V
Pioneer® 12,000 BTU 21.4 SEER2 Ductless Mini-Split Inverter+ Air Conditioner Heat Pump System Full Set 230V
Pioneer® 12,000 BTU 21.4 SEER2 Ductless Mini-Split Inverter+ Air Conditioner Heat Pump System Full Set 230V
Pioneer® 12,000 BTU 21.4 SEER2 Ductless Mini-Split Inverter+ Air Conditioner Heat Pump System Full Set 230V
Pioneer® 12,000 BTU 21.4 SEER2 Ductless Mini-Split Inverter+ Air Conditioner Heat Pump System Full Set 230V
Pioneer® 12,000 BTU 21.4 SEER2 Ductless Mini-Split Inverter+ Air Conditioner Heat Pump System Full Set 230V
Pioneer® 12,000 BTU 21.4 SEER2 Ductless Mini-Split Inverter+ Air Conditioner Heat Pump System Full Set 230V

Pioneer® 12,000 BTU 21.4 SEER2 Ductless Mini-Split Inverter+ Air Conditioner Heat Pump System Full Set 230V


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Regular price $999.00 Sale price $803.00 Save $196

Installation Kit Options:



  • High Efficiency Quantum Series Inverter+ ductless mini split heat pump system
  • Cooling capacity: 12,000 BTU/H with 21.4 SEER2 / 10.8 EER2 efficiency
  • Heating capacity: 12,000 BTU/H with 9.1 HSPF2 / 3.23 COP2 efficiency
  • Voltage: 208~230V, 60Hz, 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: $77.00
    • Heating: $254.00

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.

Wall-Mounted Mini Split

Quantum Series Inverter+ (20 SEER) and Inverter++ (22 SEER)

At Pioneer Mini Split, we offer variable capacity ductless wall-mounted mini split systems, available with different efficiency ratings and in a variety of capacities for simple installation and great single-zone comfort. Our ductless mini split wall-mounted air conditioners and heat pumps come with 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 for a more efficient ductless wall air conditioner and heating system. Check out our selection of wall-mounted heating and cooling units 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



  • Front Desk Control
    With a smart control board, Pioneer air conditioners can be turned on/off via long distance control signals.
  • 46° F Heating

  • 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 Using

  • 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.
  • Follow Me 
    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.


  • Wired Controller
    Compared with infrared remote controller, wired controller can be fixed on the wall and makes air conditioner control more convenient.
  • Remote in Engineer Mode

  • Central Control Management
    The centralized controller is a multi-functional device that can control up to 64 indoor units within a maximum connection length of 3.90 Ft.

Technical Information


Pioneer Mini Split Certifications

Performance Data

  • Power Supply: 208~230V, 60Hz, 1Ph
  • Cooling Rated Capacity: 12,000 BTU/h
  • Cooling Capacity Range: 3,800~12,850 BTU/h
  • Cooling SEER2: 21.40 BTU/W.h
  • Cooling EER2: 10.80 BTU/W.h
  • Heating Rated Capacity: 12,000 BTU/h
  • Heating Capacity Range: 2,730~12,500 BTU/h
  • Heating HSPF2 (Region IV/V): 9.1 / 6.9 BTU/W.h
  • Heating C.O.P.2 (47°F/5°F): 3.23 / 1.68 W/W
  • Refrigerant Type: R410A/28.6 oz.
  • Suitable Area: 250~450 Sq.F

Indoor Unit Data

  • Part Number: WS012GMFI20HLD
  • Air Flow (Hi/Med/Lo): 317 / 207 / 144 CFM
  • Sound Level (Hi/Med/Lo): 37 / 30 / 22.5 dB(A)
  • Net Dimensions (WDH): 31"-1/2 x 7"-3/8 x 11"-5/8 Inches
  • Carton Dimensions (WDH): 34"-1/2 x 11"-1/4 x 15" Inches
  • Net / Gross Weight: 19.8 / 25 Lbs

Outdoor Unit Data

  • Part Number: YN012GMFI20RPD
  • Sound Level: 55.5 dB(A)
  • Net Dimensions (WDH): 30"-1/8 x 11"-7/8 x 21"-7/8 Inches
  • Carton Dimensions (WDH): 34"-7/8 x 13"-1/4 x 24" Inches
  • Net / Gross Weight: 59.3 / 64.8 lbs
  • Breaker Needed: 15A (double-pole)

Manuals & Downloads

Free Shipping For All Orders Over $49


For a Limited Time we offer free shipping on All Orders Above $49 by Standard Ground or delivered by Freight (LTL) to the 48 contiguous states. Free shipping offer does not apply to Alaska, Hawaii, or any international destination. Free shipping eligibility is noted on the product page, above the price.

Click here for information on Returns and Refunds

Shipping Details

We only ship to the 48 contiguous United States. No shipments to APO/FPO addresses, AK, HI, PR or other US Territories. No international shipments. Due to the size and the weight of our equipment, we can only utilize well known freight companies for shipping. Each shipment will be palletized, strapped down and wrapped in stretch film to protect against damages during transit.

Upon arrival you may ask the driver to break down the palette into individual cartons to unload the goods from the truck easily. We generally include Lift Gate service. This will arrive as curb side delivery. Trucker will unload the goods from the truck to ground level. If you must have inside delivery service, there will be an additional charge which needs to be paid separately and coordinated with the freight company. We also allow free pickup from our main distribution warehouse, located in Miami area. Equipment we sell is not suitable for express or courier shipping because of their weight as well as high risk of damages.

Due to higher than expected order volume and busy sales season, larger orders may take an extra 3-5 days to be prepared for shipment. We are working around-the-clock to ship out all orders in a timely manner, and will communicate with you if there are any unexpected delays or questions.

We prepare each shipment within 72 hours after the receipt of payment (only during weekdays). Trucking companies usually pick up same day or a day after we call them that the shipment is ready. The transit may take any time between 5 to 8 business days and in rare cases up to 12 days.

We will provide tracking information after shipment. Please contact us in case of any shipment delays. CHECK YOUR INFORMATION CAREFULLY TO SUBMIT THE CORRECT DELIVERY ADDRESS, UPDATED EMAIL AND A VALID PHONE NUMBER with your order. Someone must be present to receive the cargo at the time of delivery. Delivery company will call your phone number to setup a delivery appointment for residential deliveries. If your phone number is not valid, the cargo can not be delivered and will be returned at your expense within 3 days of arrival. If the delivery is refused or can not be delivered, it will be handled as returned merchandise.

Upon arrival, count all cartons and compare with the number stated on the delivery receipt before signing. Open the cartons and inspect the goods carefully for any damages. All products have been inspected under strict ISO regulated facilities and leave our warehouse in perfect condition. Report any shipping damages to the freight carrier on the delivery receipt and file a claim. Also contact us with the description of damages and pictures, etc. Although rare, certain freight damages can occur and we are here to help.

We carry all necessary replacement and service parts and components in large quantities and make them available during and after the warranty period.

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Ask a Question
  • The measured electrical service at my breaker panel is 240VAC, 60Hz, single phase. Your specifications indicate 208-230V. Will your unit work on 240V?

    Yes it will be suitable for any service between 207~253V.

  • Will it be ok to use a dedicated 20 amp breaker and 12/2 wire, also do you need a disconnect by the outside unit?

    You would need a 15A double pole breaker for this system. Either 14 or 12 AWG would be fine. A disconnect is optional but highly recommended.

  • What size breaker with this unit take?

    The 12K 230V system takes a 15A double-pole breaker with 14 AWG wire. The wire type is 3 conductor, for L1/L2/GND.

  • What is output heating and cooling at lowest output?

    The lowest cooling output is 3700 BTU, and 3500 BTU for heating. For full specs, see here.

  • Is it possible to shut off the temperature display on the front of the unit? It may to bright for sleeping?

    Absolutely, just hit the LED button on your remote and it will turn the display off.

  • What size are the line set connectors for 12k unit

    This system takes 1/4" and 1/2" diameter sized lines.

  • How many square footage does this cover?

    This is recommended to be used for spaces between 200 and 450 square feet in typical scenarios.

  • My current outdoor a/c compressor has a double pole 30 amp breaker, would i be able to run 2 of these units off that single breaker?

    Each condenser unit needs its own dedicated breaker. As such, you would need two breakers for two systems, or keep that 30A and put a multi-zone system on it.

  • What size hole is needed for refrigerant and communication lines?

    It would be a 2.5" diameter hole.

  • can this unit be controlled by wifi

    Yes, you would just need to incorporate this device.

  • Did I read correctly, the provided electrical cable that comes with the line set for communication between the inside and outside units is the only power wire that will be needed for the operation on the inside unit. ?

    That is correct. Outdoor unit powers indoor unit via the signal cable.

  • What are the dimensions of the indoor unit?

    Net Dimensions (WDH): 31.57 x 7.44 x 11.69 Inches

  • Is this the inverter+ or ++?

    This is an Inverter+. The Inverter++ line would be found here.

  • How many sq feet is this unit rated for?

    For general applications, this system is intended for spaces sized between 200 and 450 square feet.

  • What size breaker do I need for 220 volt 12000btu unit for 500 sf

    This particular unit would take a 15A double pole breaker.

  • what is cost of wall mounting brackets for outside unit for this system

    Those are available here.

  • I know this comes with a wall-mount kit for the indoor unit, but does it come with a wall mount kit for the outdoor unit?

    The wall mounting brackets for the outside unit are sold separately as an accessory and are available for purchase here or here.

  • this unit use regular 120 v. or 220v?

    This particular system uses 208/230V and not 110/120V. The 110/120V version is located here.

  • Does wall unit come with mounting brackets?

    Yes the indoor wall handler comes with the mounting bracket pre-attached on the back.

  • Can this system be thermostat controlled to cycle on and off

    It can be programmed to come off once set temperature is hit like an on/off unit would, though this would decrease efficiency.

  • Is a there a filter on this unit that needs to be changed from time to time? Thanks!

    The units come with 2 wash-able filters.
    There's also some supplementary ones that need replacing every year.

  • Does the blower cycle on and off as needed when the unit is on?

    This is not an on/off system, it is an inverter so it stays on but adjusts down fan speed to fight the heat loss and maintain the set temperature. This makes it much more energy efficient than turning on and off all the time. You are able to program the unit to turn off when set temperature is reached, if desired.

  • Can more than one mini split be run from the same condenser?

    This would require a multi-zone solution: multi-zone

  • Does this heating / cooling system require access to natural gas lines, or can it be run on electric only?

    This is a heat pump that uses refrigerant and runs on electricity, it cannot and does not require gas.

  • It says 45deree heating standard feature what does that mean what is the temp when heat pump stops?

    This is referring to freeze-protection (FP) mode. It is a "vacation mode" meant to protect the lines from freezing by maintaining a 46°F heating output. This particular system will heat and cool down to +5°F outside temperatures.
    You can also consider our Inverter++ line, which HEATS down to -13°F.

  • do you need a pro to make the connections and draw a vacuum?

    It is not required but recommended to have a tech come to pull a vacuum, check pressures, and release the pre-charged refrigerant. It can also be DIY with the use of special tools such as vacuuum pump and pressure gauges.

  • Does the mini split model WYS012GMFI19RL-16 come with a pad, cooper line set and communication cable?

    The "-16" at the end indicates that it will come with a 16 ft. copper lineset and 16 ft. communication cable. This can be modified on the dropdown menu, above the "add to cart" button. It would not come with a pad.

  • Where will i need to supply electricity for the system to work, inside or outside or both?

    The outdoor unit for this particular system requires a 15A double-pole breaker. The indoor unit will draw power from the outdoor unit via the communication cable included within the installation kit.

  • How many amps is does this need to run off? I'm asking so I can get the proper breaker. Thank you.

    This particular system requires a 15A double-pole breaker.

  • How many square feet will this unit cool and heat

    We recommend this unit to be used for rooms between 200 and 450 square feet.

  • What type of wire used to connect the mini split

    For power to a 230V outdoor unit it would need 2 hots and a ground, THHN type.
    For the gauge it would either be 14 or 12 AWG depending on your local electrical codes for 15 amps (the 2-pole breaker size needed for this unit).

  • What temperature does the heat pump work in? If it is 20 degrees outside, will the heat pump still work?

    This particular system will heat and cool down to +5°F outside temperatures.
    You can also consider our Inverter++ line, which HEATS down to -13°F.

  • How short can I cut the line set to ??

    The minimum we recommend is 5 feet.


    We do not recommend anything more than 1 inch as this can interfere with return air input.

  • Does this unit qualify for the 2024 tax credit ?

    You would need the Energy-Star version which is WYS012GMFI22RL.
    Please locate eligible units using the rebates center here:

  • What Is The Part Number For A 25' line & Wire Set ?

    This model uses 1/4"-1/2" diameter lines, so it would be SKU: PKW-1/4-1/2-25

  • How cold on the AC. Can the interior of home be set This is for a bedroom we like it 60 to 62 degrees in summer

    You can set it between 62 and 86F with a special 46F mode for freeze protection.

  • What’s the lowest outdoor temp can be for heating mode??

    -13 Fahrenheit.

  • I ordered this mini split with 16 ft copper line. I realized that I need a 25 ft kit. Do I need to add extra refrigerant to the condenser or it will work with the factory load?

    The factory pre-charge will cover 25 ft and shorter lineset runs.