MRCOOL 5th Gen 25ft 1/4 x 1/2 Pre-Charged Lineset for DIY 9K, 12K & 18K Indoor

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.

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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.

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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.

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What’s Included?

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

• User Manual

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Warranty

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

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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

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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.