36k BTU 16 SEER MrCool DIY Ductless Heat Pump Split System 3rd Generation - Wall Mounted

Item: HA20871
Models: DIY-36-HP-C-230B, DIY-36-HP-WMAH-230B
Condition: New
Easily replace or update your space with the 3rd Generation MrCool DIY 36k BTU 16 SEER Ductless Heat Pump Mini Split System. This two part solution includes an air handler to distribute your heat & air indoors and an outdoor heat pump condenser that can, together, heat and cool up to 1,500 square feet with its 36,000 BTU capacity. And don't worry, because virtually any homeowner can install this MrCool HVAC solution themselves without the need for special tools, equipment, or training.

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This Bundle Includes

36k BTU MrCool DIY Ductless Wall Mounted Air Handler - 3rd Generation 36k BTU MrCool DIY Ductless Wall Mounted Air Handler - 3rd Generation Item: HA20867 Model: DIY-36-HP-WMAH-230B Qty: 1
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What's Included

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Easily replace or update your space with the 3rd Generation MrCool DIY 36k BTU 16 SEER Ductless Heat Pump Mini Split System. This two part solution includes an air handler to distribute your heat & air indoors and an outdoor heat pump condenser that can, together, heat and cool up to 1,500 square feet with its 36,000 BTU capacity. And don't worry, because virtually any homeowner can install this MrCool HVAC solution themselves without the need for special tools, equipment, or training.

How is this possible? Installation is made easy with the Quick Connect Line Set, MrCool's cutting-edge technology. The line set allows for vacuumless installation and is pre-charged with the eco-friendly R-410A refrigerant, a refrigerant that is a chlorine free alternative to old refrigerants.

And you don't need a lot of space for the 3rd Generation MrCool DIY 36k BTU 16 SEER Ductless Heat Pump Mini Split System. The outdoor condenser is compact and can be anchored to the ground, a concrete pad, or a wall. Its dimensions are 37.21 inches wide, 31.9 inches tall, and 16.53 inches deep. If you opt for mounting the unit with a bracket, the mounting dimensions are 26.5 inches wide by 15.87 inches deep.

Once installed, the indoor air handler is easy to maintain and keep in optimal condition. The air handler can alert you when the system is leaking refrigerant or when it needs a filter cleaning or replacement. You can save money on maintenance calls by tackling simple routine tasks on your own.

The 3rd Generation MrCool DIY 36k BTU 16 SEER Ductless Heat Pump Mini Split System comes with several smart features, so you can customize your unit to your liking.

Set and forget your heating and air with AUTO mode, which automatically cools, heats, or runs the fan based on a temperature you set and the current temperature of the space.

Save money and energy while you sleep using SLEEP mode. With this option your 3rd Generation MrCool DIY mini split will increase the temperature when cooling or decrease the temperature when heating by 2°F for two hours to ensure you stay comfortable as you fall asleep. It will then run at the more moderate temperature for six hours before returning to its normal operating mode.

If you are concerned about humidity in your home, use the DRYING option to both regulate your home's temperature and dehumidify simultaneously.

In the unfortunate event of a power outage or blackout, the 3rd Generation MrCool DIY 36k BTU 16 SEER Ductless Heat Pump Mini Split System will automatically restart when power is restored to quickly return your home to a comfortable temperature.

With the 3rd Generation MrCool DIY mini split, you can control your heat and air wirelessly as soon as it is installed with the included remote from an app on your Apple or Android smartphone, or through Google Assistant, or Amazon Alexa.

36k BTU 16 SEER MrCool DIY Ductless Heat Pump Condenser - 3rd Generation - DIY-36-HP-C-230B

MrCool HA20863

The only ductless air conditioning and heating unit that is easy to install for thousands less than a conventional HVAC system. Mr Cool DIY 36k Ductless Mini Split heat pump even adjusts the temperature to the perfect degree wherever you are in your room.

A MRCOOL DIY Series heat pump is the only ductless mini split system on the market explicitly designed for amateur installation. You don't need special tools or training to install this high efficiency heat pump. A line set precharged with R410A refrigerant, the quick hook-up electrical connections, and the quality engineering mean just about anyone can install a MRCOOL DIY in their home with no problem at all in only a few short hours. If you want great air comfort without paying an arm and a leg for installation, you want an easy-to-use MRCOOL DIY Series ductless heat pump.

Unlike any other ductless heat pump on the market, the MRCOOL DIY series is specifically designed for easy installation. The MRCOOL DIY series uses a precharged refrigerant line, alleviating one major obstacle to amateur installation in a single stroke.

MRCOOL ductless mini split air conditioners and heat pumps are the cutting edge of what modern, flexible fabrication can produce. These air conditioners rely on state-of-the-art manufacturing processes and advanced design to deliver high efficiency air comfort anywhere you need it.


  • EASY DIY INSTALLATION A pre-charged R410 quick connect DIY lineset allows you to install this innovative ductless system without special tools, equipment, or training.
  • FOLLOW ME Personalized Performance for wherever you are in the room. Keep the remote close by, and MRCOOL DIY will track the air temperature around you to ensure you receive maximum comfort.
  • LOW AMBIENT COOLING Cool all the way down to 5°F. Maintain cooling even when the outside temperature reaches 5 degrees. This feature makes the MRCOOL DIY the ideal system for server rooms, greenhouses, and any other application that requires cooling all year.
  • AUTO RESTART Never lift a finger after a power outage. The MRCOOL DIY auto restart will have the unit running again in no time at all.
  • GOLD FIN CONDENSER Live on the coast? Don’t worry, our condenser is built to resist long term corrosion.
  • REMOTE APP WIFI CONTROL Control your DIY anywhere with your Apple or Android smart device and an internet connection.
  • TEMPERATURE COMPENSATION Our temperature compensation technology help keeps you comfortable in any weather conditions
  • LEAKAGE DETECTION When the MRCOOL DIY detects low coolant an alarm will sound to alert you to the problem. This will prevent damage to the compressor while you maintain high air comfort.
  • SLEEP MODE We made Sleep Mode easy to program to save money, and let you sleep a little easier.
  • LOUVER POSITION MEMORY The louver will automatically move to the same position as you set last time the unit was turned on.

Warranty Terms

For a full description of all warranties applicable to this product as well as individual manufacturer requirements, please review the manufacturer's consumer brochure and/or product warranty documents.  Online warranty registration must be completed within 60 days of installation.  Due to state laws, online registration is not required in California or Quebec. Call for warranty availability on scratch & dent and surplus items.

For additional warranty information, click here.


Model DIY-36-HP-230B25
UPC 810512033539
AHRI Number 204711125
Bundle Avg Coverage Area 1,500 - 1,800 Sq Ft
Bundle Cooling Capacity 3 Ton
Bundle Cooling Efficiency 16 SEER
EER 8.2
Heat Pump Efficiency (HSPF) 8.9
Series DIY
Zones 1
Region Compatibility Nationwide
Popular Applications Game Room, Garage, Guest Room, Man Cave, Server Room, Sunroom
California Residents see Prop 65 WARNING

DIY-36-HP-C-230B Specifications:

Model DIY-36-HP-C-230B
UPC 810512033454
Avg Coverage Area 1,500 - 1,800 Sq Ft
Compressor Inverter
Cooling Capacity 3 Ton
Electrical Phase 1-Phase
Heat Pump Efficiency (HSPF) 8.9
Line Set Connection Type Quick Connect
Liquid Line Size 3/8 inch
Max Overcurrent Protection 35 amps
Primary Heating Capacity 35,001 - 40,000 BTU
Product Height (in) 31.89
Product Length (in) 16.14
Product Width (in) 37.24
Cooling Efficiency 16 SEER
Series DIY
System Application Type Ductless Split Systems
Voltage 240
Warranty 5 Year Parts, 7 Year Compressor
Weight (lbs) 181.4400
Region Compatibility Nationwide

DIY-36-HP-WMAH-230B Specifications:

Model DIY-36-HP-WMAH-230B
UPC 810512033492
Air Flow Direction Horizontal
Configuration Wall Mounted
Blower Motor Variable Speed
Cooling Capacity 3 Ton
Electrical Phase 1-Phase
Line Set Connection Type Quick Connect
Liquid Line Size 3/8 inch
Max Overcurrent Protection 35 amps
Product Height (in) 14.25
Product Length (in) 11.1
Product Width (in) 49.57
Series DIY
Special Features WiFi Capable
Suction Line Size 5/8 inch
System Application Type Ductless Split Systems
Voltage 240
Warranty 5 Year Parts, 7 Year Compressor
Weight (lbs) 70.9900


Q & A

Do you have questions about this product?

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Can the MrCool DIY be ordered with a shorter line set?
How much current does this combined unit pull? Looks like a 40 amp circuit is necessary?
was wanting to order the mini split 36k btu gen 3 but its saying when i try to order part is on back order . how long before i can order if i can order
Hi on the model DIY-36-HP230B what is required for the electrical installation? just a 35 amp disconnect or does it need to be wired to a 240 as well?
when will this unit be available is this a good heat pump is a 30 amp outlet good
Can I add another air handler on this unit at a later date ?
im wanting to order the 36 BTU DIY MR cool but when i try its saying some of it is backordered . what want to no is how long before i can order this product , should i go ahead and order or not
What's the difference between this 3rd Generation system (HA20871) and the 2nd Generation Enhanced system (HA18422)? It looks like the line set is in the 3rd Gen is shipped separate from the air handler and has to be connected in the field, then wrapped with tape, correct?
when will this be available?
when will this unit be available again
How cold will this unit cool down to?
I am looking at Item HA20863 Model DIY-36-C-230B FOR A 30'X40' red iron building it is insulated. I live in Georgia where temps reach high nineties to 100 degrees in the summer. Is this a good choice for these conditions. Also will it need a 8 gauge wire to run 65' to the panel box.
Can I use 2 "Quick Connect Lines" (connected together) in one run?
is this unit still on back order
I know it says it can cool down to 5° but will the heat function still work at below zero?
do this unit comes without the heat pump
When will the 3rd generation be available again? Can I get a 35' precharged line set for it?
Hello. What is the average yearly cost to run the
36k BTU 16 SEER Mr. Cool DIY Ductless Heat Pump Split System 3rd Generation - Wall Mounted, Item: HA20871
Models: DIY-36-HP-C-230B, DIY-36-HP-WMAH-230B? I live in southern NJ where the average temperature is about 35 in winter and 85 in the heat of the summer. Thank you.
does this item come with all the necessary pieces and parts for installation?
what else do I need to order?
When will MODELS: DIY-36-HP-C-230B, DIY-36-HP-WMAH-230B be back in stock? I want to take advantage of the pricing offered by Ingrams on this 3 Ton system. Thanks!
Getting p4 error. But geting 240 when touhing L1 and L2
Is it possible to connect multiple heads to this outdoor unit?
So I am not asking when this WILL be in stock you have answered that enough, BUT when was the last time it WAS in stock. Since all of the questions are when will it be there it seem to me that it has been out of stock for over 18 months is that accurate?
Does this item ship on a pallet?
How long of a line set can the precharge of the 36k unit handle? I need to couple a 25 and 16 foot line sets to reach my desired compressor location. Can I top the coolant off if needed with a DIY can of 410a?
I am looking at a 36,000 BTU unit. I see they come with a 25 foot line. Do you also have a 50 foot line of hose? And if so how much additional is that?
The wire required is 8/2 with a ground.

Question: Should the wire be stranded or solid? Thanks
Is there anything extra that I will have to purchase with this system. And can you also purchase an extended warranty?
Is it mandatory for the wall hole to be on the right side of the indoor unit on these 3rd gen units? I have installed the 2nd gen versions and was able to put the wall hole to the left of the air handler for those.
Do you have an idea when this unit will be back in stock? (Mr Cool 36000 BTU)
is this unit varib;e speed forthe compressor? Can it slow down to allow longer run times?
If I have a problem with this unit is there a someone to service this in or around Beaufort NC 28516
What state does this ship from.
Can I order a la carte? I want a mini split, but not interested in a package deal. I want to start with a 3 zone with only one air handler.

Thanks, Brenton
How long is shipping
is it come with installation kit? If not what do I need ?
How many BTU's is the heat pump portion rated at?
is everything i need to heat my home included in this kit
Is it 220 amp?
Hi.. I'm Eduardo
Do you have someone to install a minisplit for me?
ITEM: HA20871 MODELS: DIY-36-HP-C-230B, DIY-36-HP-WMAH-230B
Hello, I need to know some things regarding what I am about to acquire.

ITEM: HA20871 MODELS: DIY-36-HP-C-230B, DIY-36-HP-WMAH-230B
Mrcool 36k btu mini split. DIY

1.- Do you have delivery in Miramar, FL ..?
how many days for delivery?

2.- Is it delivered to my apartment on the 2nd floor?

3.- Do you have someone to install it?

Can this 36k btu diy heat and if so how warm can it get?
What size circuit breaker do you need for your 36000 btu split unit
Does the MrCool DIY 36K bundle (Item #HA20863 & Item #HA20867) ship with wall brackets for the heat pump or are these ordered in addition to the bundle?
Another question. Is there currently a delay beyond the 1 to 2 day expected ship time.
can this unit be controlled via cell phone i would like to put one in my 1000sq ft log home in tennessee. however iwill not be moving in until early 2022
How far apart can the two units be installed?
What is the current draw for the air handler and condenser for this unit ?
my basement is cold 950 sqft 24k is good to heat the basement
Do you have a single zone diy 36k btu unit with a higher seer than 16?
How much water per hour can this air conditioner dehumidify?
What do you do with the excess line if you only need 16' of line
I can place the outside unit directly behind, to the left or to the right of the inside unit. Which would you recommend for ease of installation. Thanks
I am installing the air handler in a garage. Where I want to mount the unit inside doesn't provide a good route for the coolant lines on the outside wall (obstructions in the way on the outside wall). I noticed that there seems to be a small cut out on either side of the air handle on the end. Are these optional routes for the coolant lines? It seems that rather than bending the lines to go through the hole in the template per a normal installation, I could keep them at their current angle and then run the coolant lines out the left side of the air handler and then down the wall to an alternate location for sending to the outside unit. Of course i'll have to be careful with the drain hose to ensure its draining properly .Thoughts on this approach?

Could the air handler be mounted diagonally vs. level? (Wondering about mounting it on support beams that run up toward the peak of a room so they would not be level or vertical but diagonal.
On the 3rd generation does the line set come already connected to the air handler? I have seen installation video's where there was ~1 1/2' of line coming off the back of the air handler and you make the connection there. Is the line set exactly 25' from the back of the air handler. The reason I ask is I need 26' for my installation and that 1 1/2' would help if the line set was an additional 25'
Does Mr Cool plan on releasing a newer version (4th gen?) with a better SEER and HSPF this year? Looking for something like the Multizone's specs, but in a single 36k zone. I would hate to buy this unit and find out a new version is coming out in a couple months. Also, anything in the works to release some different sized line sets? Really need a smaller option to like a 6 foot for simple back to back installs. Thanks!
I am looking at getting one for my house. Do you have to get separate units for each room or can 1 cool/heat the entire house.
Can I get a 16 ft line set?
What type of wire needs run from service panel to disconnect?
do you install?
How well does the heat pump work in very low ambient temps. It gets below freezing slot during the winter.
Is their a ceiling mount air handler
how loud is the blower on the inside , what are the decibels
is this unit only a heat pump or is this model a/c and heat pump in one? thanks
What does the digital read out "P4" mean ?
Im interested your your mini split 36000 btu with a single indoor unit.
MODELS: DIY-36-HP-C-230B, DIY-36-HP-WMAH-230B, DIY25-3858

I have an electrician coming in to do some electrical work. Can you tell me the following:
a. The AWG of the wire
b. The correct amps for the breaker at the breaker box
c. The correct amps for the breaker at the diconnect.
I see 35 amp 240 volt total, but how much power does the inside air handler need compaired to the outside condensor need?
Can you get this DIY unit with a ceiling cassette instead of a wall mount?
WHat forms of payment do you accept? do you accept Pay-Pal
Hello - I asked a question over the weekend but realized I did not provide enough information for an accurate answer, do here is an augmented repeat. I live in south central PA and have a 16 x 12 sunroom surrounded with double pane sliding glass doors on three out of the four walls. The fourth side abuts the house which is a brick exterior. The room receives a decent amount of sun in the afternoon as it is near the southwest side of the house. I would like to know what the appropriate size for a Mr. Cool DIY split ductless split system would be to heat and cool the space.

Thank You
How large of a concrete base and how thick?

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