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NEW R-454B Refrigerant

MRCOOL 25 ft. 3/8" x 3/4" No-Vac Pre-Charged Line Set for Central Ducted Hyper Heat 2nd Gen & VersaPro 2nd Gen (R-454B Refrigerant)

MRCOOL 25 ft. 3/8" x 3/4" No-Vac Pre-Charged Line Set for Central Ducted Hyper Heat 2nd Gen & VersaPro 2nd Gen (R-454B Refrigerant)

Regular price $393.72 USD
Regular price $475.99 USD Sale price $393.72 USD
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SKUNV25-3834-O

TypePre-Charged Line Set

✅ This item is in stock!

18 in stock

Estimated Delivery: September 01 – September 03

Based on order date & typical delivery times.
• Orders Typically ship within 2 business days

This item is in stock! Estimated Arrival: Dec 08 to Dec 14

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PRODUCT DESCRIPTION

MRCOOL 25 ft. No-Vac Pre-Charged Line Set – 3/8" x 3/4" | Designed for Central Ducted Hyper Heat 2nd Gen & VersaPro 2nd Gen (R-454B Refrigerant)

Upgrade your HVAC system with the MRCOOL 25 ft. No-Vac Pre-Charged Line Set, engineered for seamless, hassle-free installation. Specifically designed for MRCOOL Central Ducted Hyper Heat 2nd Gen and VersaPro 2nd Gen systems, this line set is pre-charged with R-454B refrigerant, eliminating the need for vacuuming, refrigerant handling, or specialized HVAC tools. Whether you're a DIY installer or an HVAC professional, this No-Vac line set ensures a quick, secure, and leak-proof installation with MRCOOL’s patented quick-connect fittings.

Key Features & Benefits:

Pre-Charged with R-454B Refrigerant – No need for vacuum pumps or refrigerant charging, making installation simple and efficient.
25-Foot Length – Provides flexibility for standard HVAC installations, allowing for optimal system placement.
3/8" Liquid Line & 3/4" Suction Line – Engineered for maximum refrigerant flow and efficiency, ensuring peak performance for your MRCOOL system.
No-Vac® Quick Connect Technology – Factory-sealed, leak-proof connections allow for a fast, tool-free installation with no risk of refrigerant contamination.
Durable, Weather-Resistant Construction – Designed to withstand extreme temperatures and environmental conditions, ensuring long-lasting performance.
Optimized for Energy Efficiency – Works seamlessly with MRCOOL's latest high-efficiency systems, delivering reliable heating and cooling while supporting environmental sustainability.

Important Compatibility Notice:

This No-Vac Pre-Charged Line Set is exclusively designed for MRCOOL systems that use R-454B refrigerant (Hyper Heat 2nd Gen & VersaPro 2nd Gen).
🚫 It is NOT compatible with older MRCOOL models or any system using R-410A refrigerant. Attempting to use this line set with an incompatible unit may cause operational issues and void manufacturer warranties.

Buy from the USA’s Most Trusted MRCOOL Dealer

When you purchase from MRCOOL HVAC Direct, you’re buying from the nation’s most trusted and authorized MRCOOL dealer. We provide:

🔹 100% Genuine MRCOOL Products – No third-party resellers or counterfeit parts.
🔹 Expert Customer Support – Our HVAC specialists are ready to assist with compatibility and installation questions.
🔹 Fast & Reliable Shipping – Get your order quickly and securely.
🔹 Competitive Pricing – The best value on official MRCOOL equipment and accessories.

🔥 Upgrade your HVAC system today with the MRCOOL 25 ft. No-Vac Pre-Charged Line Set – the easiest way to install a high-performance MRCOOL system with confidence!

Frequently Asked Questions About MRCOOL VersaPro & HyperHeat Central Systems

What is the difference between the HyperHeat and VersaPro systems?

The main difference between the MRCOOL HyperHeat and VersaPro™ systems lies in their heating performance and climate suitability. Both systems use the same VersaPro central ducted air handlers, but they pair with different outdoor condensers.


is engineered for extreme cold climates, maintaining powerful heating performance even in sub-zero temperatures. These systems use advanced inverter technology and are optimized for high-efficiency heating during the winter, making them ideal for northern regions.


offers a more balanced solution for moderate climates with excellent year-round comfort, delivering efficient heating and cooling at a lower price point. It's a great choice if you live in a region with mild to moderate winters.

In short:

✔️ Choose HyperHeat if you need reliable heating in freezing conditions.

✔️ Choose VersaPro for year-round performance in temperate climates.

Are these systems truly DIY-installable, or do I need a professional?

Yes — both the MRCOOL HyperHeat and VersaPro™ systems are designed to be DIY-installable without the need for special HVAC tools or professional certification.

The outdoor condenser units are pre-charged with R-454B refrigerant, and the included line sets are vacuum-sealed, leak-tested, and pre-charged as well. This means there's no need to vacuum the system or handle refrigerant, which is typically the most complex part of HVAC installation.

The system includes:









While many homeowners successfully install these systems themselves, you should be comfortable with basic tools, lifting equipment, and following detailed instructions. For more complex installs (especially involving ductwork or electrical), you may still want to consult a licensed HVAC technician or electrician.

✔️ These are the most DIY-friendly central ducted systems available — ideal for handy homeowners and contractors alike.

Do I need to vacuum the lines or charge refrigerant during installation?

No — if you’re using the pre-charged line sets designed for these systems, you do not need to vacuum or charge refrigerant. The MRCOOL HyperHeat and VersaPro™ systems offer flexibility for both DIY installation and traditional professional installation.

For DIY installation, the system uses MRCOOL's pre-charged, vacuum-sealed quick-connect line sets, which come filled with the correct amount of R-454B refrigerant from the factory. These line sets eliminate the need for handling refrigerant or using a vacuum pump — making the installation safe and straightforward for handy homeowners.

For professional installation, HVAC technicians can install the system using traditional methods — including field-flared copper, custom line lengths, and on-site refrigerant charging, if desired. This is especially useful for custom applications or when the standard line set lengths don’t meet the project’s needs.

✅ Whether you’re going the DIY route or working with a licensed contractor, the system is built to support both installation methods effectively.

What is the maximum coverage area for each system size?

The coverage area for MRCOOL HyperHeat and VersaPro™ central ducted systems depends on the system size (BTU rating), your home's insulation, ceiling height, layout, and climate zone. Below is a general guideline based on average conditions:

  • 18,000 BTU up to 750 sq ft
  • 24,000 BTU up to 1,000 sq ft
  • 30,000 BTU up to 1,250 sq ft
  • 36,000 BTU up to 1,500 sq ft
  • 48,000 BTU up to 2,000 sq ft
  • 60,000 BTU up to 2,500 sq ft

These figures are based on typical residential conditions. Homes in colder climates, with poor insulation or open floor plans, may require a larger system.

🔧 For best results, we always recommend performing a Manual J load calculation or consulting with an HVAC professional to ensure you're choosing the right size for your space.

What are the dimensions of the VersaPro air handlers?

Each VersaPro™ air handler is compact and designed for flexible installation. Here are the approximate dimensions by size:

  • 18k: 45.75" H × 17.5" W × 21" D
  • 24k: 45.75" H × 17.5" W × 21" D
  • 30k: 45.75" H × 17.5" W × 21" D
  • 36k: 45.75" H × 21.5" W × 21" D
  • 48k: 53.75" H × 24.5" W × 21" D
  • 60k: 53.75" H × 24.5" W × 21" D

🧰 These multi-position air handlers are suitable for upflow, downflow, or horizontal installs in tight spaces like attics, closets, or basements.

Why is the VersaPro air handler the same for both VersaPro and HyperHeat systems?

The Difference is in the Condenser

  • VersaPro Condenser: Best for mild to moderate climates, offering balanced cooling and heating.
  • HyperHeat Condenser: Built for extreme cold climates, using enhanced inverter technology to maintain heating even in sub-zero temps.

So while the outdoor unit (condenser) changes depending on your climate needs, the air handler remains the same — simplifying inventory, installation, and serviceability without sacrificing performance.

✅ One air handler, two condenser options — giving customers the flexibility to choose performance based on climate, not compatibility.

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