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MRCOOL 5th Gen 25ft 1/4 x 1/2 Pre-Charged Lineset

The MRCOOL 5th Gen 25ft Pre-Charged Line Set is specifically designed to work seamlessly with MRCOOL DIY 9K, 12K, and 18K indoor units. With its Quick Connect fittings and pre-charged refrigerant, this line set eliminates the need for vacuuming or charging, making installation fast and simple—even for homeowners. This is part of the MRCOOL DIY series, designed to provide reliable climate control with minimal setup hassle.

Please note: This line set is compatible only with MRCOOL DIY models and is designed for easy DIY installation—no HVAC tools or certifications required.


MRCOOL 5th Gen 25ft 1/4 x 1/2 Pre-Charged Lineset Features

Quick Connect Fittings
No need for vacuuming or refrigerant charging. The fittings are leak-proof and make setup simple and tool-free.

Pre-Charged with R-454B Refrigerant
The line set comes fully charged with environmentally friendlier R-454B refrigerant, ready for use with compatible systems.

25-Foot Length
Ideal for accommodating various installation distances, offering flexibility for wall-mounted indoor units.

1/4" x 1/2" Diameter Tubing
Sized to fit 9K, 12K, and 18K BTU indoor units, ensuring maximum efficiency and compatibility.


MRCOOL 5th Gen 25ft 1/4 x 1/2 Pre-Charged Lineset Applications

  • Bedrooms – Quiet and efficient climate control for restful sleep.

  • Living rooms – Comfortably heats or cools high-traffic areas.

  • Home offices – Maintains a consistent temperature for productive work.

  • Garages or Workshops – Great for retrofitting spaces without existing HVAC.

  • Studio Apartments – Ideal for smaller open floor plans.


What’s Included?

  • 25 ft. pre-charged line set (1/4" x 1/2")

  • User Manual


Warranty

  • 5-Year Parts Warranty when registered and used with a DIY system


MRCOOL 5th Gen 25ft 1/4 x 1/2 Pre-Charged Lineset Specifications

Series

5th Gen DIY Line Set - R-454B

Compatible Air Handlers

18K 5th Gen DIY

Line Set Length

25 ft

Lineset Fitting Type

Quick-Connection

Gross Dimensions

32.09" D x 4.92" H x 32.09" W

Color

White

Color Family

Bronze/Copper Metallic

Refrigerant Type

R-454B

Refrigerant Volume (Oz)

2.12

Liquid Line Size

1/4

Suction Line Size

1/2

Registered Warranty

N/A

Has Batteries No

Contains Electronics

No

Contains Chemicals

Yes

Contains Aerosol

Yes

Contains Compressed Gas

Yes

Proposition 65 Warning

Yes

Restricted States

GU;PR;VI

Net Weight (Lbs)

12.1

Gross Weight (Lbs)

16.5


Frequently-Asked Questions

Is this line set compatible with earlier MRCOOL models?
No. This specific 5th Gen line set is only compatible with MRCOOL 5th Gen DIY systems using R-454B refrigerant.

Do I need HVAC tools to install this line set?
No. The Quick Connect fittings are designed for easy DIY installation without the need for HVAC tools or certification.

What systems is this line set intended for?
This line set works with MRCOOL DIY 9K, 12K, and 18K BTU indoor units from the 5th Generation series.

Why Choose Green Vista Living


At Green Vista Living, we’re passionate about providing top-quality renewable energy and eco-friendly products that not only enhance your life but also help protect the planet. We’ve built our business with one mission in mind: to be the go-to destination for renewable energy solutions, outdoor gear, and off-grid supplies. When you shop with us, you’re not just getting innovative products—you’re joining a community that’s committed to sustainability.

We Put Our Customers First


As a small, dedicated team, we care deeply about your experience. Unlike large, faceless online companies, Green Vista Living offers a personal touch in everything we do. We're here for you from start to finish—whether you need product advice, support after a purchase, or just have questions. Our knowledgeable customer service team is always just a phone call or email away, ready to assist you in any way possible.

We Share Your Passion for the Planet


Our love for the outdoors and sustainable living runs deep. Most of our team hails from the mountains of Colorado, where renewable energy and the environment are part of daily life. So when you call Green Vista Living, you’ll speak directly with an expert who understands both the technical side of renewable products and the lifestyle they support. Whether you’re looking for solar generators, EV chargers, or any of our eco-friendly offerings, you can trust us to guide you with expertise and passion.

Trusted Industry Experts


Our close partnerships with the best brands in renewable energy and outdoor gear give us insider knowledge that you won’t find anywhere else. We’ve taken the time to carefully select products that stand out for their quality and reliability. At Green Vista Living, we believe in understanding our products inside and out so that we can help you make the right choice with confidence.

More Reasons to Love Green Vista Living


Price Match Guarantee: Thanks to our partnerships, we offer the best prices around. If you find a better deal, we’ll refund the difference.


Free Shipping: We offer free shipping on most orders to the lower 48 U.S. states, making your shopping experience even easier.


100% Secure Ordering: Our site uses SSL Encryption technology to keep your payment and personal information safe and secure.


Volume Discounts: For large orders, we’re happy to provide special pricing—just reach out for a custom quote.


Authorized Dealer: As an authorized dealer for all our brands, you’ll receive full manufacturer warranties with every order.


At Green Vista Living, we aim to make your renewable energy and outdoor experience as seamless and enjoyable as possible. With our unmatched customer service, expertise, and dedication to quality, you can shop with confidence, knowing you’re supporting a company that’s as committed to the planet as you are.

Frequently Asked Questions

Yes! We provide free and fast shipping on MOST orders within the continental United States. However, some specific brands and items will require a quote. You can live chat or call us for a quote
Most orders ship out within 1–2 business days and arrive within 3–5 business days depending on your location.
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Yes. All products include any applicable manufacturer warranties, and we’ll help you handle any warranty claims if needed.
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