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Description
MRCOOL 35 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 35 ft. No Vac Pre Charged Line Set 3 8" x 3 4" for Hyper Heat 2nd Gen & VersaPro 2nd Gen Systems Upgrade your compatible MRCOOL central ducted HVAC system with the MRCOOL 35 ft. No Vac Pre Charged Line Set, designed specifically for MRCOOL Hyper Heat 2nd Gen and VersaPro 2nd Gen systems using R 454B refrigerant. This factory pre charged line set is engineered to simplify installation while delivering dependable performance, maximum efficiency,
MRCOOL 35 ft. No-Vac® Pre-Charged Line Set – 3/8" x 3/4" for Hyper Heat 2nd Gen & VersaPro® 2nd Gen Systems
Upgrade your compatible MRCOOL® central ducted HVAC system with the MRCOOL 35 ft. No-Vac® Pre-Charged Line Set, designed specifically for MRCOOL® Hyper Heat 2nd Gen and VersaPro® 2nd Gen systems using R-454B refrigerant. This factory pre-charged line set is engineered to simplify installation while delivering dependable performance, maximum efficiency, and long-lasting reliability.
With MRCOOL’s advanced No-Vac® Quick Connect technology, this line set eliminates the need for vacuum pumps, refrigerant charging, or specialized HVAC equipment. Humanity finally managed to make HVAC installation slightly less hostile to civilization. Remarkable progress.
Key Features & Benefits
- 35-Foot Length – Ideal for mid-range HVAC installations, providing greater flexibility for condenser and air handler placement.
- Pre-Charged with R-454B Refrigerant – Factory sealed and ready to install without additional refrigerant charging or vacuuming.
- 3/8" Liquid Line & 3/4" Suction Line – Properly sized to support optimal refrigerant flow and high-efficiency system performance.
- No-Vac® Quick Connect Fittings – Leak-resistant, pre-sealed connections allow for a fast and professional-quality installation.
- Tool-Free Installation Design – No vacuum pump or refrigerant gauges required for compatible MRCOOL® systems.
- Durable Weather-Resistant Construction – Built with corrosion-resistant copper tubing and premium insulation for long-term durability.
- Energy Efficient & Eco-Friendly – Designed for use with modern R-454B refrigerant systems that meet updated EPA refrigerant standards.
Designed for Compatible MRCOOL® R-454B Systems
This MRCOOL® No-Vac® Pre-Charged Line Set is specifically engineered for:
- MRCOOL® Hyper Heat 2nd Gen Central Ducted Systems
- MRCOOL® VersaPro® 2nd Gen Central Ducted Systems
The factory pre-charged R-454B design helps ensure proper compatibility, reliable refrigerant flow, and efficient heating and cooling performance for newer-generation MRCOOL® systems.
Important Compatibility Notice
For R-454B Systems Only – This No-Vac® line set is designed exclusively for MRCOOL® systems utilizing R-454B refrigerant.
Not Compatible with R-410A Systems – Do not use with older MRCOOL® models or any HVAC system requiring R-410A refrigerant. Using incompatible refrigerant components may result in operational problems, equipment damage, and voided manufacturer warranties.
Why Choose MRCOOL® No-Vac® Line Sets?
- Factory pre-charged for faster installation
- No vacuuming or refrigerant handling required
- Leak-resistant quick connect fittings
- Designed for DIY-friendly and professional installations
- Built specifically for MRCOOL® R-454B systems
- Reliable long-term performance with genuine MRCOOL® components
Buy from an Authorized MRCOOL® Dealer
When you purchase from MRCOOL HVAC Direct, you are buying from an authorized MRCOOL® dealer committed to providing genuine equipment, expert support, and reliable customer service.
- 100% Genuine MRCOOL® Products – No unauthorized parts or third-party replicas.
- Expert Customer Support – Assistance with compatibility, installation guidance, and product selection.
- Fast & Reliable Shipping – Nationwide fulfillment and secure delivery.
- Competitive Pricing – Exceptional value on official MRCOOL® HVAC equipment and accessories.
Upgrade Your MRCOOL® HVAC Installation Today
Choose the MRCOOL 35 ft. No-Vac® Pre-Charged Line Set for a faster, cleaner, and more reliable installation experience. Designed specifically for compatible MRCOOL® Hyper Heat 2nd Gen and VersaPro® 2nd Gen systems using R-454B refrigerant, this line set helps deliver professional-level performance with simplified installation convenience.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.5 ★★★★★
Based on 20 reviews
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Product Reviews
★★★★★ 5
Mind blowing page turner
Oh my stars!!! 🤯 he falls first and he falls hard, enemies to lovers, fated mates. Every characters are lovable. There's action, magic, one horse 🤭 and a plot twist that keep on twisting. Oh and a bad ass FMC! Loved it!
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Reviewed in the United States on April 23, 2026
★★★★★ 3
Interesting. Confusing ending that's too similar to another book
Ok, I had to process almost a whole 24 hours before I could write this review. And long story short, did I enjoy the book, yes. Does it have a lot of interesting and good parts to it? Also yes. But does it also have some major flaws? Absolutely.
Now I'm not gonna break down every single little thing in this book. But here are the basics of what I liked, and what I didn't like.
The good? I liked the characters. They intrigued me off the bad. The world building is pretty decent. It's a little confusing in the beginning, but information is slowly doled out, and some questions are answered. I found that there was a lot of little twists and turns that kept the story engaging. The magic system is intriguing.
But, there are quite a few things off for me. First off, we have another story that has heavy inspirations from other books. There are a lot of aspects in this story that felt directly pulled from throne of glass. And the big twist at the end? Was almost verbatim the same ending as the book how does it feel. As soon as I read it I was like hold up, I literally just read almost this same thing when I read how does it feel when it released like a year or year and a half ago.
Now I know no concepts are really new anymore, and inspiration comes for everywhere. But I feel like most stories it's like, oh this book has these vibes, or if you liked this book you'd like this one that's similar. But this reminds me of powerless in where there are like exact plots and plot points taken from other things. Now is that a bad thing? Not necessarily. I still enjoyed powerless, and I still enjoyed this story. But it does throw me.
There are also a few red flags that the MMC Acker gave me that were not the good kind of red flags we love. First, when they are riding thru the city and people throw stuff at the FMC and he does nothing? Red flag. When they meet his dad and they demand she vows not only to the king but to the MMC? Red flag. All the secrets he keeps? Red flag. When he SLAPS HER IN THE END? Red flag. I'm not sure how I really feel about him.
In the end. This was still an enjoyable read. I did like it and I am curious about the next book. But I am wary about some of the plot points and the MMC.
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Reviewed in the United States on November 26, 2024
★★★★★ 5
Just read it. You won’t regret it.
Format: Hardcover
This book completely blew me away. I loved every single character—not just the FMC and MMC, but the side characters too, which is rare. In a first book, side characters can feel flat while the focus is on world-building, but that definitely wasn’t the case here.
The romantic tension between the FMC and MMC was so good—seriously addictive. The plot itself felt pretty straightforward at first, and the world-building was easy to follow. It even gave me Heartless Hunter / Wolf King vibes… until the last 20 pages.
And wow—those final pages. I usually spot plot twists coming, and I thought this one was going to be predictable, but I was completely wrong. That ending genuinely shocked me—I haven’t had that reaction to a book in a long time.
I’m already counting down to book two (and that teaser chapter? Absolutely brutal).
Just read it. You won’t regret it.
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Reviewed in the United States on May 4, 2026
★★★★★ 4
4 Stars for Now!
Format: Kindle
I DEVOURED this book. I was in a huge slump after reading a horrible series right before this but after 3 pages of this book, I was hooked. I read the whole book in 2 days. I think the author did an amazing job at writing an engaging story with an amazing twist at the end. I know many readers feel betrayed by the twist and find the narrator to be unreliable but I feel that the twist was done in a great unsuspecting way. Though I do feel betrayed, I think there is so much room for redemption in the second book!
The author also did an amazing job at world/character building. She was able to do so without interrupting the story which is one of my huge pet peeves. A lot of authors build by taking breaks in the plot or dialogue which I find choppy and disengaging but this author was able to build in an engaging way. There was some lack of world/character building but I think that was due to keeping reader in the dark. The world, politics, and characters were all very easy to understand.
I found the romance a little lackluster and a bit off-kilter. Some of it was really pushy and rushed which left a bad taste in my mouth. I do hope the author delves deeper into the romance in coming books.
The FMC was a breath of fresh air. She was not whiny or stuck-up like most books. She was never afraid to accept help from others but she was still able to shine with her intelligence. Not once did I think she made a poor decision just for the sake of a plot point. She was really easy to like. The MMC could use some work but I think that will happen more in coming books.
This is a MUST read, my only advice would be to wait until it is a finished series!
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Reviewed in the United States on July 30, 2025
★★★★★ 5
Need book 2 please :-)
Format: Kindle
From the very first chapter, Metal Slinger hooked me and refused to let go.
Set in a brutal, metal-bound world where power is carved from steel and survival depends on strength, strategy, and sheer will, this story follows a young woman forced into a dangerous system where control over metal isn’t just magic — it’s dominance, protection, and rebellion. When she’s pulled into escalating conflict and shifting alliances, she quickly learns that power always comes with a cost.
The magic system is sharp and immersive without being overwhelming. The way metal manipulation is woven into combat and politics makes every confrontation feel cinematic and high-stakes. It’s gritty, tense, and beautifully layered.
The Brynn, our FMC absolutely shines. She’s fierce but not untouchable, resilient without feeling unrealistic. Watching her navigate betrayal, survival, and the slow awakening of her own strength felt earned every step of the way. There’s grit in her fight scenes and vulnerability in her quieter moments that make her deeply human.
And the tension? Immaculate. The chemistry simmers under the surface before sparking into something electric. Every reluctant alliance, every charged interaction, every moment of “are they about to destroy each other or kiss?” had me flying through pages.
The pacing is relentless — no filler, no wasted scenes. Twists land hard. Stakes keep climbing. And that ending? Absolutely feral. The kind that leaves you staring at the wall for a minute before immediately checking when book two releases.
✨ Gritty metal-based magic
⚔️ High-stakes survival
🔥 Slow-burn tension
🖤 Fierce, layered heroine
💥 A finale that HITS (but cliffhanger!)
This is one of those fantasies that reminds you why you fell in love with the genre in the first place. If this is just Book One, I am more than ready to be emotionally wrecked again in the sequel.
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Reviewed in the United States on February 14, 2026
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