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Low-Ambient 12,000 BTU 1 Ton 19 SEER2 Ductless Mini Split Wall Mounted Inverter Air Conditioner with Heat Pump 110/120V

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  • Ductless heat pump brings reliable heating and cooling
  • DC inverter ensures high performance and low power consumption
  • All-in-one accessory kit saves time and simplifies installation
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Product Details

About This Product

Experience instant relief the moment you enter your room with Pioneer's latest Diamante series high-wall ductless mini split heat pumps. This all-new product line was designed and developed to bring a truly affordable heating and cooling solution without sacrificing desirable features. The variable-speed inverter technology and high-efficiency 19 SEER2 average rating guarantees substantial savings from your monthly energy bill. A dual-swing louver system ensures both horizontal and vertical sweeping air throw, to perfectly reach all directions of the room. All systems in this series come equipped with an auxiliary strip heater in the condensing unit, to provide hyper-heating even in frigid -13°F temperatures. And with noise measurements as low as 27 dB, you can sleep peacefully with air conditioning quieter than even an empty library. In addition, all systems come pre-packed with a full 16 ft. installation kit, so your ductless mini split heat pump system is ready to be up and running in a single afternoon. Browse our newest selection of wall mounted Diamante split systems today!


  • Cooling capacity of 12,000 BTU/hour with 19 SEER2 and 10EER2 efficiency
  • Heating capacity of 12,200 BTU/H with 8.5 HSPF2 & 3.21 COP2 efficiency
  • Voltage of 110V - 120V, 60Hz, 1Ph
  • Complete system set including indoor fan coil section, outdoor condenser section, wireless remote controller with remote holder, 16 ft. line set with other installation accessories and free vibration absorber feet for the condensing unit
  • Unsurpassed support hotline covers installation, use, troubleshooting, warranty and parts issues
  • Built with the latest technologies using pulse width modulation driven DC inverter compressor and variable speed DC inverter fan motors for high performance and low power consumption
  • Pioneer is the best choice for pros and homeowners with the highest ratings for consumer satisfaction
  • Certified by ETL, AHRI, DOE for safety, performance and efficiency
  • Diamante series carries a full line of low-ambient wall-mounted mini splits with capacities ranging from 9,000 BTU/hour to 36,000 BTU/hour for various residential and light commercial applications
  • R410A pre-charged outdoor unit, accommodating line lengths up to 25 ft. long
  • Click here for more information on Electronic Recycling Programs
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Product Information

Internet # 325844602

Model # WYT012ALFI19RL



Air handler depth (in.)


Air handler height (in.)


Air handler width (in.)


Condenser depth (in.)


Condenser height (in.)


Condenser width (in.)



Air direction/circulation


Air handler weight (lb.)


Amperage (A)

10.2 A

BTU Cooling Rating

12000 BTU

BTU Heat Rating

12200 BTU

Color Family




Condenser weight (lb.)


Coverage Area (sq. ft.)


Decibel (Sound) Rating

29 dBA

Decibel Rating

29 dBA

Filter Type



Accessories, Heater, Mounting Hardware, Remote Control, Self-diagnostic tools

Line Set Length (Ft.)

16 ft

Mini Split Features

Auto cool, Automatic shutoff, Defrost, Ductless, Fan only option, Filter light reminder, Overload protection, Programmable, Sleep setting, Timer

Minimum Outdoor Temperature (F)


Mount Location

Wall Mount

Number of cool settings


Number of Fan Speeds


Number of Tons

1 ton

Pack Size




Voltage (v)


Wattage (watts)


Zone Capacity

1 Zone

Warranty / Certifications

Certifications and Listings

AHRI Certified, ETL Listed, Energy Star, ISO Certified

Manufacturer Warranty

Five year parts warranty covering all components, upon proper registration after installation.

Seasonal Energy Efficiency Ratio (SEER)


Questions & Answers

Q:Would this mini-split be appropriate to cool (mainly) and heat (occasionally) a 24'x24' garage to make it comfortable enough to do hobby work a couple of days a week? I'm in Alabama, where it can be 100°F with high humidity in summer and 10°F in winter.
by|May 26, 2024
1 Answer
Answer This Question

A:  Recommending 18000 BTU is it is very well insulated and sealed for air leaks. Otherwise goo got 24K

by|May 28, 2024
Q:I have a mini split pioneer why and 012ALFL19RPE model and is not cooling anymore had an HVAC person check it out and said the condensing unit on the outside is leaking Freon not at any of the fittings need a newcondensing unit what do I do? I have a warn
by|May 21, 2024
1 Answer
Answer This Question

A:  Find out where the leak is. Leaks is usually due to an installation error and at the valves where the copper pipes attach to the unit. Locate and simply reseal-tighten the leak to stop and then charge refrigerant. You must locate the leak and reseal.

by|May 28, 2024
Q:Room 28 x 18 Well insulated barn loft apartment Upstate SC
by|May 21, 2024
2 Answers
Answer This Question

A:  12000 BTU should do OK But it is borderline.

by|May 28, 2024

A:  12000 BTU will be somewhat OK but borderline.. Next size up is 18000 BTU,

by|May 28, 2024
Q:I have a 10 x 20 enclosed porch with a wall of windows and full sun until early evening in Florida, would a 12,000 BTU Mini Split work well for me?
by|Apr 30, 2024
1 Answer
Answer This Question

A:  That depends on your comfort temperature, the air tightness of windows and some shading (like tinting, etc.), as well as the roof. f it is all metal structure with no insulation and windows all around, you need a local engineer to perform heat load calcs.

by|May 2, 2024
Showing 1-4 of 256

Customer Reviews

4.4 out of 5

  • 4.4 out of 236 reviews
  • 80% recommend this product
Filter by:
Showing 1-10 of 236 reviews
Just installed so, so far so good. It gets cold and when you flip to heat it get hot. Came with everything for the install and it is per charged. I have the 110 unit because if we ever have a power outage and it’s cold, I can use this to warm the room running off my generator.
  • Verified Purchase
Good Unit - Internal Rust After 1 Year
This unit was purchased for a Bedroom Addition January 2022. I perform monthly maintenance check and clean filters regularly. The unit recently began sweating and dripping rusty water down the wall, which will require repainting. Further inspection shows that a metal clip that holds the coils in place has rusted. Why would a piece that is subject to rust be used in the internal components of the indoor unit? This will be an ongoing issue...
    7 found this review helpful
    The Old Pioneer
    Just started it up today so far so good installer had no problems
    • Verified Purchase
    • Recommended
    1 found this review helpful
    12k Working fine for me. Two more to go.
    I bought three of your mini splits at Home depot, product arrived undamaged and package very well. I just finished installing the 12K in my living room. Working Great. Instructions were fantastic. Just wanted to give your folks my feedback. I will be installing the two 9k's, one in each bedroom starting tomorrow. Pioneer Low-Ambient 12,000 BTU 1 Ton 20 SEER Ductless Mini Split Wall Mounted Inverter Air Conditioner with Heat Pump 110/120V Model # WYT012ALFI19RL x1 12k Pioneer Low-Ambient 9,000 BTU 0.75 Ton 20 SEER Ductless Mini Split Wall Mounted Inverter Air Conditioner with Heat Pump 110/120V Model # WYT009ALFI19RL x2 9k Thanks for a Great product. Mr.Michael L.
      • Recommended
      4 found this review helpful
      Keeping it cool
      This unit works great for my application. I have a 20'x25' outbuilding and it keeps it cool and dry even in 100-degree weather and hi humidity.
      • Verified Purchase
      • Recommended
      4 found this review helpful
      so quiet.
      All good so far, very power, affordable price, and the most important Super quiet. it's so quiet, even I thought the motor wasn't working. I went outside to check it out. And guess what, it was working normally. Also very convenient to used WI Fi control, also very easy. Highly recommend this high quality Mini Split from Pioneer.
        • Recommended
        3 found this review helpful
        Cheerleaders for mini splits!
        We had this mini split professionally installed in our guest house (20x30) in Dec and it works amazingly well to heat the entire place! I know it will cool the house just as well. Also, didn’t throw off the esthetics of the house.
        • Verified Purchase
        • Recommended
        3 found this review helpful
        Awesome System!
        This mini split system exceeded my expectations. Great value. Super quiet. I would rate this an advanced DIY for installation.
          • Recommended
          7 found this review helpful
          Easy to Install/ great value
          Purchased to provide cooling and heat for my 440 sqft Mancave. Easy to install. Easy to operate. Amazingly quiet and really does a great job. In service for a week and I am really happy I made the purchase. Great value for the price. Hardest part of the install was measuring and cutting hole through the outside wall. Measure 10 times and cut once! Inside unit is not heavy and easily installed on the wall. You may need help to pull the power/communication cable through the hole as you feed the line set tubing and condensate drain hose through. I cut a 3 inch hole and had zero issues feeding the lines through.
            • Recommended
            16 found this review helpful
            Great value. Quiet and effective.
            Very happy with the 220V version of this mini split. I was a little hesitant to get this brand which required getting and learning how to use a vacuum pump and gauge but it was quite straight forward thanks to YouTube. If you buy this device, here are some tips I wish I knew. 1. Drill a bigger than 2.5” hole if you can. Much easier to mount the indoor unit. 2. The manual is wrong to tell you to first open the value on the 3-way port as the picture shows the 2 way port. The 2 way port is correct. 3. It appears there is no WiFi option for this WYT series. Loss of 1 star. 4. If you get a line cover kit, make sure you slip the top back cover before you attach the lines at both ends otherwise you have to cut the backplate To fit it around the line set and it won’t look as good.
              • Recommended
              30 found this review helpful
              Showing 1-10 of 236 reviews