---
product_id: 27827835
title: "Pioneer Air Conditioner WYS012A-20 Wall Mount Ductless Inverter+ Mini Split Heat Pump, 12000 BTU-110/120V"
brand: "pioneer"
price: "¥222140"
currency: JPY
in_stock: false
reviews_count: 8
url: https://www.desertcart.jp/products/27827835-pioneer-air-conditioner-wys012a-20-wall-mount-ductless-inverter-mini
store_origin: JP
region: Japan
---

# 19 SEER & 10 HSPF energy efficiency Ultra-quiet 40.5 dB operation 12000 BTU cooling/heating power Pioneer Air Conditioner WYS012A-20 Wall Mount Ductless Inverter+ Mini Split Heat Pump, 12000 BTU-110/120V

**Brand:** pioneer
**Price:** ¥222140
**Availability:** ❌ Out of Stock

## Summary

> ❄️ Stay cool, save green, and live smart with Pioneer’s silent power!

## Quick Answers

- **What is this?** Pioneer Air Conditioner WYS012A-20 Wall Mount Ductless Inverter+ Mini Split Heat Pump, 12000 BTU-110/120V by pioneer
- **How much does it cost?** ¥222140 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/27827835-pioneer-air-conditioner-wys012a-20-wall-mount-ductless-inverter-mini)

## Best For

- pioneer enthusiasts

## Why This Product

- Trusted pioneer brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Energy Bill Slayer:** Slash your utility costs with industry-leading 19 SEER cooling and 10 HSPF heating efficiency ratings.
- • **Whisper-Quiet Zen Mode:** Experience ultra-silent operation at just 40.5 decibels—perfect for focused work or restful sleep.
- • **Year-Round Comfort Mastery:** Seamlessly switch between cooling and heating with a powerful 12000 BTU inverter+ heat pump designed for any season.
- • **Plug & Play Installation Kit:** Includes a complete 16ft copper piping kit and all essentials for a smooth, hassle-free setup.
- • **Peace of Mind Warranty & Support:** Enjoy 5 years of parts and compressor coverage plus expert tech support ready to assist you anytime.

## Overview

The Pioneer WYS012A-20 is a sleek, wall-mounted ductless mini split inverter+ heat pump delivering 12000 BTU of efficient cooling and heating. With ultra-quiet 40.5 dB operation, 19 SEER and 10 HSPF ratings, and a comprehensive installation kit included, it’s engineered for year-round comfort and energy savings. Backed by a 5-year warranty and responsive tech support, this system is a top-tier choice for modern homes and light commercial spaces seeking smart climate control.

## Description

For full technical specifications and other information please refer to the high seer web site Pioneer's newest WYS series wall mount mini split ductless inverter air conditioning and heat pump system is a full system set containing indoor section outdoor section remote controller and standard installation accessories With a Pioneer ductless mini split type air conditioning system it is possible to heat or cool any contiguous area quietly effectively and efficiently Pioneer brand WYS series ductless split heat pump systems come in a range of capacities from 9000 BTU/hour to 36000 BTU/hour WYS is an inverter-type system with a variable speed compressor providing very high efficiency levels The included wireless remote digital controller allows the users easily select among the 4 operating modes cooling heating dehumidification and ventilation Additionally an automatic switchover mode is available for totally automatic operation through its onboard computer A timer function allows the user to set the system to start or stop running at a certain time Night mode functionality automatically adopts the temperature settings to the naturally changing body temperature levels during the night Auto-restart function memorizes all settings in case of a temporary power failure and restarts the system to continue running the same way after the power is reconnected A cloud programmable wireless Internet remote access function is also available sold separately Smart buyers choose Pioneer brand inverter split systems for their top quality reliability and performance which are available at extremely affordable prices

Review: Good. Works well for my small rental. - I hate people telling me what I can't do. I want to live in a society that is always trying to help others do everything, from medical help to "holier than thou" HVAC work. Programmers have put open source software into everything like TVs, refrigerators, thermostats, electrical grids, airplanes, and everything else digital. Why can all other professions have the same sharing attitude? I decided to install this myself in a small, 720 square foot decently well insulated home. This was my first time ever working with HVAC and so far it seems to have worked great. It cools off beautifully. The first thing I have to say is that the instructions are written very well. The only part that seemed understated was the head unit wiring. It's not hard but I didn't find the instructions clear on my particular model. I had trouble pumping a vacuum during my "tests" before install. I didn't even come close to tightening the copper properly. The instructions warned several times about "over tightening". I waaay under tightened. With the proper torch with a torch wrench, I had no problems. I pulled a vacuum, waited for a half hour, and filled the system with refrigerate as directed by the instructions. It worked great. Running the copper lines is the most difficult and nervous part. I was very careful, and I recommend two people help with this. The instructions are great. But there are a few things that caught me by surprise: - The indoor unit just clings onto the bracket. If feels strange, but it looks great. - The drain line seems a little short still. - It came with a small bag of "plastic" something and I have no idea what that is for. The instruction made no mention. My local discount tool place sells torch wrenches for $20 and crow foot wrench heads. You need a large head ( I believe 1") for the large line. The only place I can find that sells those is desertcart. Search for Crowfoot Wrench Set. Should run about $20. ***You need this!*** Since the heat pump mode operates at a high pressure, it's very important that it's properly tightened. - AC Refrigeration Pump (can be bought on desertcart for about $130) - Mini Split adapter fitting. (the pump is usually a different size then minisplit) ($15) -Torch Wrench ($20) -Crow Foot Wrench Set ($20) *You need this* - HVAC flaring Kit ($35) - Hole Saw ($20) - Pipe cutter (for copper) ($10) - Condenser bracket/Mounting bracket or pad ($45) - Line cover kit ($45) - Electrical AC disconnect ($10) - Electrical wire - Pipe sealant suitable for HVAC lines. ($8) So your'e looking at around $350 if you were to buy all the extra tools and parts yourself. The electrical, with a shutoff by the unit costs about $30 for all the parts and wiring. I've been running it on "eco" mode and it keeps the place cool on 100 degree days. I can easily get the house down to 67 if I crank the system on high. And that's it! I'm happy so far, seems very well engineered.
Review: Just amazing. Perfect for a tiny house or other mobile application. - I had some concerns about using this air conditioner on a mobile trailer. Those concerns have been laid to rest. I am happy to say it has worked perfectly. The install went smoothly using the direction provided. The quality of the product is top notch. When I started looking into using this I had some question so I'm going to answer them in case anyone had the same question. 1. How loud is this unit? Answer: You can't even hear it run unless the room is dead silent. It is literally the quietest air conditioner I have ever heard. Even the lightest sleeper will never noticed when this thing comes on at night. 2. How many amps does it use? This was my biggest question since I was using a inverter generator to power it. At it's maximum it uses 10.5 amps. My generator has a screen with amps and volts on it. The best part about this air conditioner is that there is not spike when the unit comes on. When first started it uses about 4 amps. As the compressor speeds up the amps used slowly go up until it maxes out. With most air conditioning units there is a big spike when the unit kicks on and that requires you to have a much larger generator to handle the surge when it starts. Not this one. 3. Will the compressor vibrate a lot while running? I mounted this on a platform on the back of my trailer so I had a concern that the outdoor condenser unit would vibrate and transfer noise into the trailer. It absolutely does not. This thing runs so damn smooth that you can barely feel it running if you put your hand directly on the unit. You can tell this is a quity product the minute you fire it up. I actually got scared at first because I didn't think it was working. That's how quiet it is. I hope this review helps other who are thinking of using this for a tiny house or other trailer application. I wouldn't hesitate to purchase it again. I have even had people comment that they will be buying one when their current A/C goes out. Great product. High quality.

## Features

- Save money all year-round with a highly efficient ductless mini split inverter+ heat pump system
- Ultra-silent and beautifully built perfect for home or light commercial use
- Use for both cooling and heating 12000 BTU/hour with 19 SEER and 10 HSPF efficiency
- Comes with every needed component in the box including an easy-install 16ft copper piping kit
- Free tech support and a 5 year coverage on the parts and compressor

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01DVW6G06 |
| Additional Features | ductless |
| Air Conditioner Application | home, light_commercial |
| Air Flow Efficiency | 141 cubic_feet_per_minute_per_watt |
| Annual Energy Consumption | 269 kwh |
| BEE Star Rating | 3 Star |
| Best Sellers Rank | #1,872,463 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #411 in Split-System Air Conditioners |
| Brand | Pioneer |
| Brand Name | Pioneer |
| Capacity | 1 tons |
| Color | White |
| Compressor Type | rotary_scroll |
| Control Method | Remote |
| Controller Type | Remote Control |
| Cooling Power | 12000 british thermal units |
| Customer Reviews | 4.3 out of 5 stars 703 Reviews |
| EU Spare Part Availability Duration | 5 years |
| Efficiency | High |
| Floor Area | 500 square_feet |
| Form Factor | Wall-mounted unit |
| Global Trade Identification Number | 00858132006083 |
| Included Components | Indoor Unit, Outdoor Unit, Installation Kit, Remote Controller |
| Installation Type | Split System |
| Inverter Type | Has Inverter |
| Item Dimensions D x W x H | 7.38"D x 31.5"W x 11.68"H |
| Item Type Name | Mini Split Heat Pump |
| Item Weight | 19 pounds |
| Manufacturer | Parker Davis HVAC International, Inc. |
| Model Name | Wall Mount Ductless Inverter+ |
| Model Number | WYS012AMFI20RL |
| Noise | 40.5 db |
| Operating Mode | Cooling |
| Outdoor Unit Compatibility | Requires New Outdoor Unit |
| Power Source | Corded Electric |
| Product Dimensions | 7.38"D x 31.5"W x 11.68"H |
| Refrigerant | R 410A |
| Seasonal Energy Efficiency Ratio (SEER) | 19 |
| Special Feature | ductless |
| Start Year | 2020 |
| Start year | 2020 |
| UPC | 858132006083 |
| Voltage | 120 volts |
| Warranty Description | 5 year parts, 5 year compressor (limited parts warranty upon registration) |
| Warranty Type | Limited |
| Wattage | 790 watts |
| Window Opening Maximum Height | 12 inches |

## Product Details

- **Brand:** Pioneer
- **Capacity:** 1 tons
- **Color:** White
- **Cooling Power:** 12000 british thermal units
- **Noise Level:** 40.5 db
- **Product Dimensions:** 7.38"D x 31.5"W x 11.68"H
- **Seasonal Energy Efficiency Ratio (SEER):** 19
- **Special Feature:** ductless
- **Start year:** 2020
- **Voltage:** 120 volts

## Images

![Pioneer Air Conditioner WYS012A-20 Wall Mount Ductless Inverter+ Mini Split Heat Pump, 12000 BTU-110/120V - Image 1](https://m.media-amazon.com/images/I/61BF6rNgicL.jpg)
![Pioneer Air Conditioner WYS012A-20 Wall Mount Ductless Inverter+ Mini Split Heat Pump, 12000 BTU-110/120V - Image 2](https://m.media-amazon.com/images/I/71tKGnMnTeL.jpg)
![Pioneer Air Conditioner WYS012A-20 Wall Mount Ductless Inverter+ Mini Split Heat Pump, 12000 BTU-110/120V - Image 3](https://m.media-amazon.com/images/I/71Ajbphb5vL.jpg)
![Pioneer Air Conditioner WYS012A-20 Wall Mount Ductless Inverter+ Mini Split Heat Pump, 12000 BTU-110/120V - Image 4](https://m.media-amazon.com/images/I/71YUPGiQHgL.jpg)
![Pioneer Air Conditioner WYS012A-20 Wall Mount Ductless Inverter+ Mini Split Heat Pump, 12000 BTU-110/120V - Image 5](https://m.media-amazon.com/images/I/71jpJ03T55L.jpg)

## Available Options

This product comes in different **Color, Size** options.

## Questions & Answers

**Q: How hard is installation?**
A: I'm an amateur, but handy, and I just finished installing one today. First to answer some questions below: the unit comes pre-charged, there's no need for the installer to add freon. However it is necessary to vacuum the lines before you release the freon. I bought a vacuum and a set of gauges for less than $100. My son and my brother may be installing one of these, so we'll be able to use that equipment for them too.
For me the hardest part was drilling a hole through the wall. I mounted the indoor unit on a cement block wall, and it took a long time to drill a two and a half inch hole through that wall.

I did everything myself, the only time I needed any help was when I had my wife keep tension on the wires outside as I lifted the indoor unit up to the wall.

The copper tubing was about 18 in too long for my setup, so I borrowed a flaring tool and cut and flared the tubing to fit. Flaring tools are cheap if you can't find a friend to borrow one from.  Someone recommended to me using Nylog Blue to seal the tubing connections, so I did.

Be prepared for a surprise when you remove the plugs from the copper lines coming out of the indoor unit. They are loaded with nitrogen and as you release the plug it will shoot several feet away from the pressure. Don't stand in front of it! My first instinct was, oh no! I just released the freon. But of course the freon is only in the outdoor unit.

Copper tubing can be kinked, but if you're reasonably careful with it you won't have any problems. Just don't try to make any sharp bends.

It was a fairly large project, but nothing too challenging. Just take care and read the step by step instructions carefully. 

Someone here said you need a nitrogen tank, but that's not mentioned anywhere in the instructions. It may be something that professionals do to pressure test, but the instructions say to let the freon itself do your pressure testing. The downside is that if you actually have a leak you'll lose freon, but a leak is not very likely.

It works! My garage is getting cool.

**Q: Are there any parts that we would need to purchase that doesn't come with the system?**
A: My 24000 btu has a 5/8 inch low pressure side tubing and needed to make a tight 90 degree bend so i needed a tubing bender . So where i live in texas i couldnt find a ac contractor to pull a vacuum on system , they wouldn't do it because they didn't install it so bought a vacuum pump guage set and r410 a adapter and did it myself and saved  300$ on a service call and dont forget the line set cover it hides the tubing and makes install look very clean

**Q: It says it "comes with precharged for line set lengths between 10'~25'" how do you order different lenghts when ordering through amazon?**
A: Amazon order comes with a 16’ line set. You have to order through Pioneer for the diff lengths. The unit is pre-charged from Amazon.

**Q: Is there a condensation line included with line set or a condensation pump?**
A: Naturally draining condensate. Hose included.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good. Works well for my small rental.
*by Z***H on August 22, 2019*

I hate people telling me what I can't do. I want to live in a society that is always trying to help others do everything, from medical help to "holier than thou" HVAC work. Programmers have put open source software into everything like TVs, refrigerators, thermostats, electrical grids, airplanes, and everything else digital. Why can all other professions have the same sharing attitude? I decided to install this myself in a small, 720 square foot decently well insulated home. This was my first time ever working with HVAC and so far it seems to have worked great. It cools off beautifully. The first thing I have to say is that the instructions are written very well. The only part that seemed understated was the head unit wiring. It's not hard but I didn't find the instructions clear on my particular model. I had trouble pumping a vacuum during my "tests" before install. I didn't even come close to tightening the copper properly. The instructions warned several times about "over tightening". I waaay under tightened. With the proper torch with a torch wrench, I had no problems. I pulled a vacuum, waited for a half hour, and filled the system with refrigerate as directed by the instructions. It worked great. Running the copper lines is the most difficult and nervous part. I was very careful, and I recommend two people help with this. The instructions are great. But there are a few things that caught me by surprise: - The indoor unit just clings onto the bracket. If feels strange, but it looks great. - The drain line seems a little short still. - It came with a small bag of "plastic" something and I have no idea what that is for. The instruction made no mention. My local discount tool place sells torch wrenches for $20 and crow foot wrench heads. You need a large head ( I believe 1") for the large line. The only place I can find that sells those is Amazon. Search for Crowfoot Wrench Set. Should run about $20. ***You need this!*** Since the heat pump mode operates at a high pressure, it's very important that it's properly tightened. - AC Refrigeration Pump (can be bought on Amazon for about $130) - Mini Split adapter fitting. (the pump is usually a different size then minisplit) ($15) -Torch Wrench ($20) -Crow Foot Wrench Set ($20) *You need this* - HVAC flaring Kit ($35) - Hole Saw ($20) - Pipe cutter (for copper) ($10) - Condenser bracket/Mounting bracket or pad ($45) - Line cover kit ($45) - Electrical AC disconnect ($10) - Electrical wire - Pipe sealant suitable for HVAC lines. ($8) So your'e looking at around $350 if you were to buy all the extra tools and parts yourself. The electrical, with a shutoff by the unit costs about $30 for all the parts and wiring. I've been running it on "eco" mode and it keeps the place cool on 100 degree days. I can easily get the house down to 67 if I crank the system on high. And that's it! I'm happy so far, seems very well engineered.

### ⭐⭐⭐⭐⭐ Just amazing. Perfect for a tiny house or other mobile application.
*by G***4 on August 8, 2017*

I had some concerns about using this air conditioner on a mobile trailer. Those concerns have been laid to rest. I am happy to say it has worked perfectly. The install went smoothly using the direction provided. The quality of the product is top notch. When I started looking into using this I had some question so I'm going to answer them in case anyone had the same question. 1. How loud is this unit? Answer: You can't even hear it run unless the room is dead silent. It is literally the quietest air conditioner I have ever heard. Even the lightest sleeper will never noticed when this thing comes on at night. 2. How many amps does it use? This was my biggest question since I was using a inverter generator to power it. At it's maximum it uses 10.5 amps. My generator has a screen with amps and volts on it. The best part about this air conditioner is that there is not spike when the unit comes on. When first started it uses about 4 amps. As the compressor speeds up the amps used slowly go up until it maxes out. With most air conditioning units there is a big spike when the unit kicks on and that requires you to have a much larger generator to handle the surge when it starts. Not this one. 3. Will the compressor vibrate a lot while running? I mounted this on a platform on the back of my trailer so I had a concern that the outdoor condenser unit would vibrate and transfer noise into the trailer. It absolutely does not. This thing runs so damn smooth that you can barely feel it running if you put your hand directly on the unit. You can tell this is a quity product the minute you fire it up. I actually got scared at first because I didn't think it was working. That's how quiet it is. I hope this review helps other who are thinking of using this for a tiny house or other trailer application. I wouldn't hesitate to purchase it again. I have even had people comment that they will be buying one when their current A/C goes out. Great product. High quality.

### ⭐⭐⭐⭐⭐ I love this split system!
*by M***N on February 21, 2024*

So glad I finally bought this model. It made a huge difference. For years, I had a portable (roll-around) AC unit in my garage work area. It was loud, in the way, and due to its design was sucking air out of the room that it was chilling, pumping hot air out a huge pipe to exhaust the heat. A few months ago, I replaced that with this split AC/heat pump system. I use it to maintain the temperature in a two-car garage workshop. This workspace was insulated as much as possible, so the roll-around unit could keep up, but it struggled. This one does so silently. No matter what the temperature is outside, it keep the inside the desired temperature. The inside head unit is almost dead silent. The outside compressor portion is quiet as can be as well. During the hot Texas summer, it has no problem keeping up, and now during the cold winter nights, it's maintaining the warmth in the room equally well. I'm very impressed. Plus, the entire room feels the same temperature, which wasn't possible with the previous device. Easily controlled with a remote control, I can make the occasional adjustment if need be. I love it. Installation took a few hours, as I had to drill holes through the brick walls of my home. I have zero complaints.

## Frequently Bought Together

- Pioneer Air Conditioner WYS012A-20 Wall Mount Ductless Inverter+ Mini Split Heat Pump, 12000 BTU-110/120V
- DuctlessAire Outdoor Wall Mounting Bracket for Ductless Mini Split, HVAC, Compressor, Heat Pump System - Easy to Install Universal Heavy Duty Wall Mount Bracket for 9000-36000 BTU
- Refrigeration Technologies RT201B Nylog Gasket/Thread Sealant, 30 ml (1 Pack)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-10-23*