Pioneer Air Conditioner WYS012A-20 Wall Mount Ductless Inverter+ Mini Split Heat Pump, 12000 BTU-110/120V

I installed this one and had an issue with a leak, not from my threads but from a factory sealed area. They promptly replaced the wall unit and some r410 and it runs great!Love the ease of use and how quiet they are. My first one was a basic less expensive WYT model, and it works great. The heat cranks out and it gets to 0 degrees F here all the time. It isn't enough to be a stand alone heat source but it supplements the heat in my poorly insulated cabin.The second unit was the more efficient 22 SEER and it runs great as well, those were 9000 BTU. I now have a 12,000 BTU and is the 21.5 Seer.I like the air drying mode when you don't need the AC, it takes the humidity out of the air.I leave the units off during the week and use the wifi module to turn them on before I go to the cabin on Friday. They are cool when I get there. The WYS models are the way to go for ease of wifi. The WYT model I have is a pain to install the wifi and I haven't done it yet. The whole wall mount has to be dismantled to plug it in.Super easy to install on your own. Look at YouTube for videos. You only need a $150 in tools and you save over $1000

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.

I am a retired engineer that designed, and built my 3,000 sq ft, passive solar, earth contact home over 30 years ago. I had been considering replacing my 24,000 BTU, through wall heat pump, that serves our main lower 2,000 sq ft of living area for over a year. This June my heat pump decided to die. It was only 3 years old, and under warranty. Over a 4-month period, through the entire summer, the warranty company sent a repairman out 3 times with wrong parts. Needless to say, it was a long hot summer, and thank God the house is earth contact. Looking ahead I thought this was the time for a mini split, and found that Pioneer was the best choice for me.Now the installation problem. When I designed the passive solar home, in 1988, it has a lot of casement windows that look out on Lake of the Ozarks. There is not enough space to place any manufacturers inside equipment. The removal of one window, in a set of five was necessary.Installation of my 24,000 BTU Pioneer equipment was easy. It is a Model WS024GMF120HLD. The inside unit makes no more noise than a summer breeze, and the outside unit we never hear in the house. Even outside the unit is very quiet. What will be interesting is how much we might save on electricity. Two years ago, I replaced my 50 gal elect hot water heater with a heat pump equipped 50 gal water heater, and it saves us about $30 a month. Our average electric bill is about $135 a month, so because of our existing efficiency I don't expect a large drop in usage, but time will tell.The warranty company finally sent me a new replacement through the wall heat pump after 4 months. It sits boxed in my garage waiting for a new owner from Craig's list. I now have a modern unit that as a trained engineer / auto mechanic I don't need to depend on a A/C service call in a month.