MRCOOL 35 Ft. R-454B No-Vac Line Set NV35-3834-O

The MRCOOL 35 ft R-454B No-Vac Line Set (model NV35-3834-O) is a pre-charged refrigerant line set engineered to simplify and streamline the installation of compatible MRCOOL central ducted HVAC systems, including VersaPro® and Hyper Heat® 2nd Gen models. This 35-foot line set arrives factory-pre-charged with R-454B refrigerant, eliminating the need for vacuuming or refrigerant charging during installation — significantly reducing complexity, time, and labor.

Featuring both a 3/8″ liquid line and a 3/4″ suction line, the set is sized to match the refrigerant flow requirements of larger ducted systems. Its No-Vac technology and quick-connect design allow for secure, leak-resistant connections without the use of specialized HVAC tools, making it easier for licensed installers to complete the job efficiently and accurately.

The line set is constructed with durable materials and UV-protected insulation to withstand outdoor exposure and help protect the internal refrigerant lines from weather and environmental conditions. This rugged build supports dependable performance and long-term reliability for central split system installations.

Ideal for setups where the indoor and outdoor components are positioned farther apart, the 35 ft No-Vac Line Set provides a practical, ready-to-use solution that supports efficient heating and cooling without the traditional challenges of refrigerant handling. Its combination of pre-charged convenience and robust design makes it a smart choice for larger HVAC installations.

Features

• Pre-Charged Convenience – Comes pre-charged with R-454B refrigerant, eliminating the need for vacuuming or charging.
• Tool-Free Installation – No brazing or vacuum pump required, saving time and reducing installation risks.
• Leak-Proof Seal – Factory-sealed connections help ensure a consistent and safe refrigerant flow.
• 35 Ft Length – Provides extended reach, ideal for split installations requiring longer line routing.
• High Compatibility – Designed to integrate seamlessly with MRCOOL central ducted and ductless units using R-454B.

Specifications

Applications

• Residential HVAC – Reliable refrigerant connection for MRCOOL home systems.

• Retrofit Projects – Simplifies replacing older refrigerant lines with eco-friendly R-454B linesets.

• Remote Indoor Unit Locations – Ideal for extended-distance indoor unit placements.

• Fast Install Jobs – Best suited for quick and efficient system installs.

What’s Included

• MRCOOL 35 Ft. R-454B No-Vac Lineset (NV35-3834-O)
  

• User Manual

Frequently-Asked Questions

Is this lineset compatible with older MRCOOL units?
This lineset is compatible only with MRCOOL systems that use R-454B refrigerant. Verify your unit’s compatibility before purchase.

Can I use this lineset with a non-MRCOOL system?
No. The lineset is engineered for MRCOOL's R-454B-specific units and may not work correctly with other brands or refrigerants.

Do I need professional tools to install this lineset?
No. The No-Vac design removes the need for vacuum pumps or brazing, allowing for a quicker, easier installation.