Pioneer® 12,000 BTU 20.8 SEER2 Ductless Mini-Split Inverter+ Air Conditioner Heat Pump System Full Set 115V

Pioneer® 12,000 BTU 20.8 SEER2 Ductless Mini-Split Inverter+ Air Conditioner Heat Pump System Full Set 115V
Pioneer® 12,000 BTU 20.8 SEER2 Ductless Mini-Split Inverter+ Air Conditioner Heat Pump System Full Set 115V
Pioneer® 12,000 BTU 20.8 SEER2 Ductless Mini-Split Inverter+ Air Conditioner Heat Pump System Full Set 115V
Pioneer® 12,000 BTU 20.8 SEER2 Ductless Mini-Split Inverter+ Air Conditioner Heat Pump System Full Set 115V
Pioneer® 12,000 BTU 20.8 SEER2 Ductless Mini-Split Inverter+ Air Conditioner Heat Pump System Full Set 115V
Pioneer® 12,000 BTU 20.8 SEER2 Ductless Mini-Split Inverter+ Air Conditioner Heat Pump System Full Set 115V
Pioneer® 12,000 BTU 20.8 SEER2 Ductless Mini-Split Inverter+ Air Conditioner Heat Pump System Full Set 115V

Pioneer® 12,000 BTU 20.8 SEER2 Ductless Mini-Split Inverter+ Air Conditioner Heat Pump System Full Set 115V


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Regular price $1,069.00 Sale price $858.00 Save $211

Installation Kit Options:



  • High Efficiency Quantum Series Inverter+ ductless mini split heat pump system
  • Cooling capacity: 12,000 BTU/H with 20.8 SEER2 / 10.3 EER2 efficiency
  • Heating capacity: 12,000 BTU/H with 8.7 HSPF2 / 3.13 COP2 efficiency
  • Voltage: 110~120V, 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: $79.00
    • Heating: $242.00

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: 110~120V, 60Hz, 1Ph
  • Cooling Rated Capacity: 12,000 BTU/h
  • Cooling Capacity Range: 4,300~12,600 BTU/h
  • Cooling SEER2: 20.8 BTU/W.h
  • Cooling EER2: 10.3 BTU/W.h
  • Heating Rated Capacity: 12,000 BTU/h
  • Heating Capacity Range: 4,000~12,500 BTU/h
  • Heating HSPF2 (Region IV/V): 8.7 / 6.6 BTU/W.h
  • Heating C.O.P.2 (47°F/5°F): 3.13 / 1.91 W/W
  • Refrigerant Type: R410A/30
  • Suitable Area: 300~450 Sq.F

Indoor Unit Data

  • Part Number: WS012AMFI20HLD
  • Air Flow (Turbo/Hi/Med/Lo): 341 / 309 / 206 / 176 CFM
  • Sound Level (Hi/Med/Lo): 41.5 / 30.5 / 26.0 dB(A)
  • Net Dimensions (WDH): 31.57 x 7.44 x 11.69 Inches
  • Carton Dimensions (WDH): 34.45 x 11.22 x 14.96 Inches
  • Net / Gross Weight: 20 / 25 lbs

Outdoor Unit Data

  • Model Number: YN012AMFI20RPD
  • Sound Level: 55.5 dB(A)
  • Net Dimensions (WDH): 30.1 x 11.93 x 21.85 Inches
  • Carton Dimensions (WDH): 34.8 x 13.25 x 24 Inches
  • Net / Gross Weight: 62.2 / 67.7 lbs
  • Breaker Needed: 20A (single-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
  • Is the total line length of the 10' line set 10' plus the length of the line stubs that are part of the wall unit that get turned and put through the hole in the wall?

    Yes, the pigtail stems on the back of the unit are not counted. The 10' length is the separate lineset.

  • Hello , with the system 12,000 btu system 110v , how long is the supply line and how short???

    You can select the length under "Installation Kit Options" Dropdown menu above the Add to Cart button. We have 10, 16, 25, 33, 50 ft options available.

  • How many amps does the 120 ac unit use at peak uses?

    At peak it is 8.9A. These are slow start units so they peak only at max output, not at startup.

  • what is the difference between net and carton dimensions?

    Net is the unit itself. Carton is with including the box it comes in for shipping purposes.

  • I purchased this unit, I lost the directions to the remote control information, how can I get that information? Thank you

    Sure, here you go:

  • Does a 110-120 v. System . Heat and cool the same as 220-240 v? Or is it better to get a 220v

    There is no real performance-difference between 115V and 230V versions of the same BTU capacity. It all comes down to what you have available or preference. We offer the 115V versions of 9000 and 12000 BTU single-zone wall mounts for those whose panels are limited in adding additional electrical breakers. 230V would generally run more electrically efficiently, but the electrical cost to run either is fairly even.

  • Can this be use for a semi truck

    Certainly, it has been used in that application many times. See this picture:

  • Can the outdoor unit be wall mounted?

    Certainly, you can see our recommended wall bracket for doing by clicking here.

  • How much freon is needed to recharge the unit in the event it becomes discharged?

    The precharged amount for a lineset between 10 and 25 feet is 30 ounces of R410a.

  • How many square feet will this unit serve....heat and air

    This is intended for 200 - 500 square feet roughly.

  • Does the lineset that comes with the kit have pre-flared ends with the nuts on already? in the pics online it looks like that but the installation manual says you have to cut the pipe and flare them yourself? thanks.

    They arrive pre-flared and ready to connect. Manual just shows that in case you want to shorten them or make your own flares.

  • What diameter do I need for the installation kit (copper piping kit) if I am buying the installation kit separately?

    It would be 1/4" - 1/2".

  • Is this model Energy Star Rated?

    It is not, the equivalent model that is Energy-Star rated would be located here.

  • What gauge wire from the breaker is recommended for this unit?

    This would use 12 AWG wire (20A breaker).

  • Does this unit have to be evac? Or is it connect and its ready to run.

    You would need to evacute the lines to verify no leaks and remove contaminants before releasing the refrigerant.

  • Can the exterior unit be laid on its side?

    It cannot, it must be upright at all times.

  • do this unit can be cotrolled from me phone?

    Yes, it would require this smart controller module.

  • Hi- does this website provide installation along with purchase?

    We do not provide installation but you can provide us your zip code and we can see if there are any recommended installers nearby that you can reach out to.

  • Is there any kind of condensate pump available if gravity drain is not an option?

    Yes there is one available here.

  • 20 amp 110 circuit ok

    Yes this unit takes a 20A breaker.

  • can line set go on either side of wall unit?

    Yes, they can exit from the back through a left or right side hole. There are also knockouts on their side for a left or right side exit instead.

  • Will this unit work off grid with solar power? What would the system requirements in terms of energy be?

    This can be done, it can run on a 115V storage or generator. Please refer to the tech spec sheet for wattage and power usage and requirements.

  • is the installation the hose the connects both units

    Yes, this is the copper lineset and communication wire that connects the two together, as well as the drain hose for the indoor unit.

  • What size room is this designed for?

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

  • How is condensate drained from interior air handling unit?

    The condensation collects in the drain pan where it then drains out via gravity through the rear condensate drain tube.

  • Are there third party wifi thermostats comparable with this unit?

    This unit couldn't take a wired thermostat at this time. For a similar sort of functionality, you can consider the Cielo Smart Controller device which is wireless but would be compatible with this unit.

  • I have to install on an 8" thick concrete wall. How long are the tubing stubs that come already attached to the indoor unit?

    The system comes with roughly 14" of pre-attached pigtails on the back of the air handler.

  • How do I know how long of a line I need?

    This would generally be the distance between where you are planning to mount the indoor and outdoor units. The lineset will be connecting the two together.

  • Can I mount the wall mount 12000 indoor unit on a wall that is 52" the angled to 8'? I would have it mounted at 50" plenty of airflow above it.

    The system needs to be on a completely vertical and level wall, for proper drainage purposes as it drains via gravity.

  • Can a ten foot line set be used on my Pioneer 12000btu 115V mini-split?

    Yes, this system can use anywhere from 5 up to 80 ft of lineset.

  • Is there any warranty coverage on the compressor?

    The system comes with 5 years of coverage on the compressor upon registration.

  • what is the amperage of the 110vac 12,000 btu model?

    This particular unit takes a 20A breaker. It draws 8.9A during operation.

  • Is Dehumidification provided on this unit?

    Yes this system comes with DRY mode which is a dehumidification mode that will drop humidity quickly, however it is not a mode designed to run for long periods as it can also drop temperature quickly.

  • During final hook up of refrigeration lines, must the system/lines be evacuated prior to charging the refrigerant?

    The way it works is that the outdoor condensing unit is pre-charged with enough refrigerant R410A to accommodate refrigerant lines that are up to 25 ft long. You will need to vacuum the lines before releasing the refrigerant housed within the outdoor unit.

  • Does this unit plug into a 20 amp 110 outlet?

    This requires being hardwired to a dedicated 20A breaker, it does not plug into a regular household outlet.

  • How long is power cord on 110 unit?

    This does not come with any sort of power cord or electrical wire as this must wired to its own dedicated breaker.
    The communication cable between indoor and outdoor unit would be the same length as the installation kit chosen.

  • can the refrigerant lines be run horizontal or close to at any point

    This would not be an issue.

  • What are the lowest temperatures that the heat pump will still work. Temperatures get down to -20 Fahrenheit a couple of times/year.

    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.

  • What's typical shipping times

    Orders are shipped out within 1-2 business days and transit times can be found here.

  • Does this 12,000 btu 19 seer 115 v unit come with the refrigerant lines, wiring and drain line, if so, are they already attached to the inside unit. If you need to buy the installation kit, how much for a 16' long

    The installation kit length options would be selected on the dropdown menu above the "Add to cart" button. The installation kit is: copper refrigeration lines, communication wire between indoor and outdoor unit, 10 ft drain hose, wall cap, sleeve, and putty. There is approximately 14" of pre-attached copper lines on the rear of the unit. The standard length of the installation kit is 16 ft.

  • can i install this myself?

    You can DIY as long as the system is installed carefully and correctly abiding by all steps in the instruction manual.

  • Will the unit self start after a power interruption? Would like to set the temperature and leave for the summer.

    Yes, this system is equipped with auto-restart with memory for power outages.

  • Can you send some info for my neighbor? He is interested but elderly and needed help with this.

    Please feel free to browse our technical brochure which has all of the relevant information about features and specifications.

  • How heavy is the wall mounted unit? My home has old lathe and plaster walls. Hard to wall mount many things

    20 lbs.

  • Can the line sets. electrical , and condensate line exit the unit from the side of the evaporator rather than thru a hole in the wall directly behind the unit? M My situation is that I do not have an exterior wall to mount the evaporator. I need to expose the mentioned lines on a wall under the most inconspicuous cover.

    Yes, there are knockouts on either side of the cabinet to facilliate a left or right side piping exit instead of rear.

  • How do I turn on freeze protection mode... where the unit would turn on to keep the room temp above about 46 degrees?

    To enable FP mode you would put the unit on heat mode, then take it to 62F, and then double tap the down arrow on your remote.

  • How many amps does this unit pull?

    10.6A in cooling and 10.3A in heating. For all relevant specs, please see the technical brochure.