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MRCOOL DIY® 5th Gen 1/4" x 1/2" Pre-Charged Quick Connect Line Set - R454B (for 18K Indoor Units)

by MRCOOL
SKU DIY16-1412-O
Sold out
Original price $399.00
Original price $399.00 - Original price $750.00
Original price $399.00
Current price $239.00
$239.00 - $599.00
Current price $239.00
Availability:
Out of stock
Availability:
Out of stock
Availability:
Out of stock
Availability:
Out of stock

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$239.00
FAQs

What size DIY Mini Split do I need?

Get ready to tailor your comfort with precision! Here's what you need to consider:

  1. The Size of the Area to Heat / Cool (Square Feet)
  2. Your Local Climate (Is it sizzling hot or icy cold for prolonged periods?)
  3. Insulation (From drafty spaces to snug havens, insulation plays a crucial role)
  4. Basic Sizing based on Square Footage alone:
  • 9K BTU = 180 to 375 Sq Ft.
  • 12k BTU = 376 to 500 Sq Ft.
  • 18k BTU = 501 to 750 Sq Ft.
  • 24k BTU = 751 to 1,000 Sq Ft.
  • 36k BTU = 1,001 to 1,500 Sq Ft.

Still need help? Get in touch with our HVAC Experts!

Check out our blog 'Sizing Your Mini Split'

Can I mix and match Wall Mount and Ceiling Cassettes Air Handlers?

Yes, of course! Get in touch with one of our HVAC experts and we can put together a custom package for you.

What is the operational temperature range for DIY Mini Splits?

The operational temperature range for DIY air conditioning units varies based on whether it's a Multi-Zone or Single-Zone system:

Multi-Zone:

For the 4th Gen Multi-Zone 18k – 36k condensers:

  • Heating: -13°F to 75.2°F (outside temperature)
  • Cooling: 5°F to 122°F (outside temperature)

For the 4th Gen Multi-Zone 48k condensers:

  • Heating: 5°F to 75.2°F (outside temperature)
  • Cooling: 5°F to 122°F (outside temperature)

Indoors, at the thermostat:

  • Cooling: 62°F to 90°F
  • Heating: 32°F to 86°F

Single-Zone:

For the 4th Gen Single Zone 12K – 24k condensers:

  • Heating: -13°F to 75°F (outside temperature)
  • Cooling: -13°F to 122°F (outside temperature)

For the 4th Gen Single Zone 36k condensers:

  • Heating: 5°F to 75°F (outside temperature)
  • Cooling: 5°F to 122°F (outside temperature)

Indoors, at the thermostat:

  • Cooling: 62.2°F to 89.6°F
  • Heating: 32°F to 86°F

What can I do about the excess coil/line set length?

It is recommended to leave the remaining/excess line set coiled horizontally near the condenser and wrapped with protective tape. This will not impact performance whatsoever.

  • 5 stars: 36 (100%)
  • 4 stars: 0 (0%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
This product has no reviews of its own. The merchant grouped it with related products, so the reviews shown are from across that group.
J
JAMES NIMS
Surprisingly Great

Was very skeptical about these systems and had read a few mixed reviews online prior to pulling the trigger on a 3 zone with HVAC Kingdom. The install was smoother than I expected and when I ran into a minor hiccup, the customer service team was super responsive and helpful. My neighbors just paid 4x for a similar system in the same house layout and I couldn’t be happier with the results and I’m loving having AC for the first time ever!

J
Jonathan Woods
Easy DIY just as it’s called

We have a home which only has electric baseboard heaters and are super expensive. We’ve been looking at mini splits but didn’t want to pay the outrageous HVAC vendor fees. Studied MrCool DIY systems and finally decided to buy it. Everything shipped and arrived super quick. You do have to have basic maintenance skills to install as stated in the manual. Also be sure to triple check your install locations and measure the length to order the right size lines. The charged copper lines are not super easy to straighten so the 25’ roll doesn’t mean it will actually go 25’ so give yourself some extra room. Installed the four zone system in about 2 days without any issues. It was -10 last night and the system worked without any issues and kept the house at a nice 70. Excited to have the system and hope it works great in the future!

A
Andrew Frieden
Great product

Everything was delivered on time!

S
Shannon
48K BTU multizone

Love this system really quite and does a frat job in my 2800 sq. Ft. shop

C
Curtis
Perfect purchase

I was nervous about purchasing from hvac kingdom. Purchase was seemless

B
Bill Cochran
Love these units

Have two other Mr cools that I have purchased previously, cannot get over how efficient and well these units run. Love the little updates that I have on my latest 12K that I have bought, better remote in Reading easier access to clean filters, thanks again for the unit, would recommend to anybody and I have

J
John Garnett

Very very good

D
David Hemendinger
Great organization!

Configured my units correctly, shipping was right on time, great customer service.

t
thomas treacy
Excellent unit

Fairly straightforward to install. Works well.

J
Jamie Spergin
HVAC

The unit was delivered by a semi after I spoke to the delivery company and told them it would be tough to deliver. Left beside the road. The unit had to be moved with a front end loader. To large to carry. Install went well. Only issues I had was the whip that was purchased from Mr. Cook was for 3/4” knock outs. The electrical panel on the unit had 1/2” knock outs and there wasn’t enough drain line to for the evaporator to be ran away from the building. Product seems well built and cooks like it should

J
Jamie Spergin
18K

System was easy to install with basic tools. AC works great. Haven’t been able to use the heat pump yet.

J
Jeff Cusick
Great cooling, low noise, not too complicated install

The system is working great. Keeping the house cool and is very quiet. The install was not complicated. I watched a few YouTube videos online, so I knew what to expect. Overal I think it took me 30 hours to install. My lines were 25, 35, and 50 ft. So a lot of time was getting them in place and securing them lines na installing covers. Overall worth the self install. I’m sure I saved 5,000 and the job was done with more care.

K
Kenneth Sprague
Mr. Cool

Wished we would have known about Mr. Cool a couple years ago….

J
James Case

I

K
Kent Burch

:)

K
Keyvan Kazemi

Easy to install and works great.

T
Tanner Miller

Awesome! Easy install and no problems yet.

Y
Yvonn Klinakis
Excellent high quality product

Very efficient. Easy to install and set up.

B
Bobby Tripp
Owner

We had a great experience with the installation and they are working great

S
Scott Johns
Mr cool

We love our me cool.
This is the 3rd unit we have purchased and installed.

E
Ethan Parker
Bought 3 already!

So far I've purchased 3 of these units. And they all work really well! Very happy. HVAC Kingdom make things easy for me

M
Michael Johnson
Highly Recommended HK!

Great pricing at HVAC Kingdom and the system itself is quality and easy to install! I did most of it myself and just got an electrician to do the electrical work

J
Jason Rodriguez
Just What I Needed

Got this mini split installed and did a significant amount of research before hand. MRCOOL was the way to go because they were the only true DIY on the market. HVAC Kingdom helped me pick the right size system for my space. Friendly staff and lightning fast delivery!

G
Gregory Tate
Very happy with everything!

Had installed a unit at my home so knew what to expect. Install went reasonably smooth . There up and running and daughter is happy. Performing as expected

K
Kyle Bennett
Great product - no complaints!

I've had this installed for a few weeks and so far no issues!

C
Chris Morgan
Five Stars All Around

This is my first mini split a/c unit I installed. Installed what I could, and had pro do the rest, works like a charm, very very quiet..

A
Aaron Carter
Very reliable!

HK is a great store. Item arrived on time, packed very well, easy to install and works great

T
Tyler Gibson
Works great and easy

Good product, everything works and its easy to manage!

B
Brian Ellis
Very quiet - and easy to install!

That air condition works very well it is quiet and efficient easy to install it exceeded my expectations

K
Kevin Walsh
Would buy again!

1st was easy to install and it's working very well. And a great price!

D
Derrick Foster
The company exceeded my expectations

Great quality, great price and works so good! Its very Quite and my bills wenst down. Very responsive to my email questions.

J
Jordan Lee
Impressed with the Quality

Thanks HVAC Kingdom for your great customer service after sale.

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