MRCOOL® DIV25-1438-O — R-454B 25ft 1/4″ + 3/8″ Lineset for DIY 6K, 9K & 12K Indoor

MRCOOL DIV25-1438-O R-454B — MRCOOL® DIV25-1438-O — R-454B 25ft 1/4″ + 3/8″ Lineset for DIY 6K, 9K & 12K Indoor

The MRCOOL DIV25-1438-O R-454B (manufacturer part DIV25-1438-O) is a genuine OEM HVAC component available at Cedars HVAC, your trusted source for heating, cooling, and refrigeration parts. We stock this HVAC component for fast nationwide shipping from our Miami warehouse, so contractors, facility managers, and homeowners can get the exact replacement they need without delay.

Product details

MRCOOL® DIV25-1438-O — 25ft R-454B Line Set

Complete your MRCOOL mini-split installation with this official R-454B line set. The DIV25-1438-O is a 25-foot pre-charged-compatible line set with 1/4″ + 3/8″ copper tubing, designed specifically for DIY 6K, 9K & 12K Indoor units. Pre-flared ends make installation straightforward — no special tools required.

Key Features

• 25-Foot Length — great for most single-room installations
• Line Sizes: 1/4″ + 3/8″ — correct diameter for DIY 6K, 9K & 12K Indoor
• R-454B Compatible — engineered for MRCOOL’s current refrigerant standard
• Pre-Flared Ends — no flaring tool needed, connects directly to your unit
• Insulated Lines — foam insulation minimizes energy loss and condensation
• MRCOOL Official Part — sourced directly from MRCOOL, guaranteed compatibility

Compatibility

This line set is designed for use with MRCOOL DIY 6K, 9K & 12K Indoor. Always verify your indoor unit’s line set specifications before ordering. Need help selecting the right line set? Call Cedars HVAC at (305) 850-6693.

Installation Note

A licensed electrician may be required to run the communication wire separately. For an easier installation, consider the DIY Pro Cable version of this line set.

Bundle & Save

Purchasing a MRCOOL DIY mini-split? Add this line set to your order and complete your installation in one shipment. Questions about which line set you need? Call (305) 850-6693.

Why buy from Cedars HVAC

• Genuine OEM HVAC parts — not aftermarket substitutes
• Contractor-friendly pricing on every HVAC component
• Fast nationwide shipping from Miami, FL
• Real HVAC expertise — call us at (305) 218-5880 if you need help confirming compatibility
• Financing available through Affirm and PayPal Pay Later

About this part

This MRCOOL DIV25-1438-O R-454B is part of our Line Sets catalog. Contact us if you need help identifying compatible models or sourcing volume quantities. For installation guidance, always refer to the manufacturer documentation and consult a licensed HVAC technician where required.

Shipping and returns

Most MRCOOL DIV25-1438-O R-454B orders ship the same or next business day from Cedars HVAC in Miami, Florida. Standard ground shipping covers the continental United States, and expedited options are available at checkout. Returns are accepted within 30 days on unopened, uninstalled parts — see our return policy for full details. International shipping is available on request; contact our team for a quote.

Frequently asked questions

Is this part new and in stock? Yes, we list only in-stock items. The MRCOOL DIV25-1438-O R-454B ships from our Miami warehouse the same or next business day.

Will this HVAC component fit my equipment? Compatibility depends on the model and revision of your existing equipment. If you need help confirming fitment for the MRCOOL DIV25-1438-O R-454B, call us at (305) 218-5880 with your unit model number and we will confirm before you order.

Can I get a contractor or wholesale discount? Yes. Cedars HVAC offers volume pricing for licensed HVAC contractors, property managers, and resellers. Request contractor pricing or call us to set up an account.

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