MRCOOL 9000 BTU 115V Ductless Inverter Mini Split Air Conditioner & Heat Pump System, 4th Gen Advantage Series - Wall-Mounted AC Unit w/Heating and Cooling for Home, Office & Commercial Space

I bought this because of a suggestion from a builder I work with frequently. He knew I like to do things myself. After investigating I decided on the 12k 240 volt system. I installed indoor and outdoor unit. I attempted to make the connections but stopped when I started to remove the caps on the inside unit, it started hissing, which I wasn’t expecting. I have a HVAC guy I know personally and requested one of his guys visit to complete the installation. The technician mentioned the hissing was just nitrogen in the unit. He completed the typical servicing they would do on mini splits, pressure test and pulling vacuum. I’ve run the system for a month and have no complaints. It works great and it’s super quiet. The WiFi module paperwork wasn’t updated for this new model but I figured it out.

Really love this unit. It heats and cools our small space here in Florida and keeps the electric bill down too. The app controls it when away or at home although quirky. The remote control is great. It was fairly easy to install and doesn't take up much space. Lots of YouTube videos show you how to do it. You have an inside, small hang on the wall unit, and a small outside unit. Very quiet. We don't even know if it's running or not until we walk up to it and feel if air is blowing or not. Really can't hear it run. No problems with it and I would buy it again.

I deeply regret purchasing the Mr. Cool 12,000 BTU mini split unit. My husband installed this in our rabbit barn—a space well within the unit’s advertised capacity—and from the start, it was nothing but trouble. Over the short month and a half we had it, the unit was unreliable, inconsistent, and ultimately dangerous. Over the weekend, it completely failed without warning. As a result, we tragically lost five of our rabbits due to the heat. This is not just a matter of poor performance—it’s a heartbreaking and avoidable outcome. We had a HVAC professional inspect the unit and were told it was 100% out of Freon. For a brand-new unit marketed as DIY and barely a month old, this is completely unacceptable. I trusted the reviews and the hype around Mr. Cool, but buying this unit was a huge mistake. It was marketed as an easy, reliable solution, and it failed on every front—functionally and ethically. Buyer beware…

I bought this for an apartment room off my house that's 25ft x 15ft. Its the main heat and AC in this room which my oldest son lives. I installed it last summer so we had it thru this whole winter. No problems heating even on 15 degree nights. Didnt even have to crank it up on colder nights to accommodate the colder temps. The coldest night we had here this winter was 9 degrees and windy. It was putting out 120 degree air than night. I have 2 other 18k Mrcool units for the rest of the house which is why i went with this one. Now the 9k dont have that crazy blower fan speed that the big ones have but its comparable air flow of a big window unit. Very efficient due to the variable compressor. One thing I like about mini splits are you can run them off smaller generators in a power outage where a typical heat unit is on a 60 amp breaker and you cant. If your concerned about heating or cooling power just buy a unit one size up. Bigger unit dont work as hard so it pulls less power while maintaining temp.

Works way better than any ac unit I ever gotten. Easy to install. Quiet as heck! My electric bill didnt spike up the fan speed was fast yet quiet. The size is perfect and energy efficient! Very good quality.

Update 1/11/21: Changing rating to 4 stars from 5. Heating is not nearly as efficient as cooling. Here in the Autin area it sometimes drops to the 30s and rarely to the 20s. I've noticed that when the temp falls below 40F it struggles to maintain 68 degrees in the garage. The garage has insulated doors with heated rooms above and on two sides. Yesterday, I noticed it went into defrost at least three times. All-in-all I am still happy, but I had hoped the heating function would have been a little better. Update 10/14: This thing is still going strong. Has run almost every day since June. This thing is awesome!!! Why did I wait so long? Quite as a mouse. Colder than a few hearts I know. Why I chose the Advantage unit over the DIY - Simply because you can't trim the line-set on the DIY. I called MR. Cool and told them I couldn't live with a bunch of coiled AC lines laying on the ground. They suggested the Advantage series. As long as you are comfortable cutting copper line, flaring copper line, running a vacuum and looking at a gauge, then you are set. There are a million YouTube videos showing you how to do it. The unit came with 16 feet of line-set and I only used 50 inches of it. I bought all parts on Amazon except for the conduit, main breaker, and 10 gauge power cable to the disconnect. I also had to purchase a short piece of 3.5" PVC as the supplied sleave for the line-set was too short for my wall. Below are the extra items I purchased on Amazon: 3.5" hole saw for brick - tip - rent a nice roto hammer if you need to go through brick and don't own one. - https://www.amazon.com/gp/product/B07ZSRTFJH/ref=ppx_yo_dt_b_asin_title_o05_s00?ie=UTF8&psc=1 Power Whip https://www.amazon.com/gp/product/B0756N989G/ref=ppx_yo_dt_b_asin_title_o07_s00?ie=UTF8&psc=1 Disconnect - https://www.amazon.com/gp/product/B000LF42NK/ref=ppx_yo_dt_b_asin_title_o08_s00?ie=UTF8&psc=1 410a Valve Core removal tool - I did not like this tool. Poor quality but ended up working https://www.amazon.com/gp/product/B07MCWMQ97/ref=ppx_yo_dt_b_asin_title_o09_s00?ie=UTF8&psc=1 Line-set cover - https://www.amazon.com/gp/product/B07SPL5RZD/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1 Nylog - https://www.amazon.com/gp/product/B008HOSQQQ/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1 Wall Mount for outdoor unit - https://www.amazon.com/gp/product/B00LDU9R2I/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1 Delivery - Why buy at a big box hardware store when Amazon delivers to your door? Came on a lift-gate truck and they delivered it inside the garage. They took it off the pallet and took the pallet with them (which I preferred). The driver was extremely polite. Communication - They (the transport company) kept calling the number on the order, which was not my number. It was an Amazon number in San Antonio. I contacted the seller prior so I had the shipper number. I called the transport company and made arrangements for delivery. I gave them my direct number. However, the driver still had only the Amazon number. Luckily, he called dispatch and they texted me that he was on the way. Could have had the unit on Friday, but got it Monday. Regardless, I was fine with that. Lesson learned - contact the seller and get the transport company contact info and call them. Installation instructions - The manuals are written by someone who speaks English as a secondary language. Spell and grammar check were definitely not used on the install manual. I bought the 24K unit, but the manual is the same for all of them. On page 12 (fig 4.3) there is an itsey-bitsey, teeny-tiny diagram which is needed to mount the indoor unit bracket and locate the center of the hole needed for the line-set. I went online and downloaded the manual in PDF, blew up the diagram and printed it out full page. Note - there is no template with the Advantage Series. The diagram indicates that the vertical center-line for the hole is 151 mm from the center of the right leg of the bracket. There are no reference marks on the bracket to measure from. HOWEVER!!, there is stamped into the metal instructions to measure 120 mm from bracket edge to locate the center-line. So that is what I did. I then went to check my work and measured 151 mm from the center-line I just drew back to the bracket. It came no where near the center of the bracket. So I called tech support for a warm-and-fuzzy. He said to measure about 5 or so inches from edge of bracket. Since the diagram requires you to calculate the outside edge of the unit and then measure from this imaginary line, I asked him about the horizontal center-line for the hole using the bracket as the reference point and he said about an inch up from the bottom of the bracket. Since the hole is 3.5" in diameter I already knew I needed to be 1.75" up from the bottom of the bracket. I politely said goodbye and figured it out on my own. I prefer to work in metric since it is so much easier, but here are the measurements I ended up using to lovcate the center of the hole I needed to drill. 120mm (4.72 in) from bracket right edge for vertical center-line, and 45 mm (1.8 in) from bottom of bracket up for horizontal line. The cross-hair gives the center of the hole. Note: There are other options for the line-set. I chose to have the line-set leave the right rear of the unit. Speaking of measurements - The outdoor unit mounting measurements are in goofy fractions. For instance, 21.26 inches and 350.52 mm. Really? I can't imagine needing to be within 1/100th of a mm to mount a unit. This was more of an annoyance than anything else. Anyway. My point is to take the instructions with a grain of salt. Do your own measurements and math and you will be fine. To the fun part - What can I say? This thing rocks! I was tempted to sleep in the garage last night. Difficulty rating is a "6" on a scale of 1 to 10; Even with the ambiguity of the install manual. The longest part of the process was drilling the hole. I spent 3 hours studying the measurements and also drilling the hole. This also included making sure everything lined up perfectly outside outside. I had the line-set come out perfectly centered between the outside unit and the disconnect. Spent one hour running power. This included the disconnect 45 minutes prepping and hanging inside unit. (after getting bracket hung.. See "hole" above). 45 minutes hanging outside unit on wall. 3 hours making all connections, including trimming line-set and vacuuming system. This was a long review, but I hope this helps someone make a decision. I'm happy with my purchase.

The heater was not wired hook up for wires not #. Tru wall pipe was broken and did look as easy as you tube videos.then noticed the short warranty compared to10 or 12 of others .Had to return it true purolator because of size ended costing 561 dollars so to sum it all Don't bother with amazon with this cause you really don't get the help for the job . Learned a lesson at a huge price so before you buy something shop around cause nobody is gonna help you