SKU: 85755445904

MRCOOL DIY 5th Gen E-Star Series 18K BTU, 1.5 Ton, 21.5 SEER2 Ductless Mini-Split Heat Pump System with Ceiling Cassette Air Handler – R-454B

$1534.50 $1705.00
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Ships within 48 hours · Estimated delivery Aug 22 - Aug 27

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Description

MRCOOL DIY 5th Gen E-Star Series 18K BTU, 1.5 Ton, 21.5 SEER2 Ductless Mini-Split Heat Pump System with Ceiling Cassette Air Handler – R-454BMRCOOL DIY 5th Gen E Star Series 18K BTU, 1. 5 Ton, 21. 5 SEER2 Ductless Mini Split Heat Pump System with Ceiling Cassette Air Handler R 454B The MRCOOL DIY 5th Gen E Star Series 18K BTU Mini Split Heat Pump System delivers next generation efficiency, low environmental impact, and true do it yourself installation. This single zone package features a premium ceiling cassette air handler for discreet comfort, providing powerful heating and cooling

MRCOOL DIY 5th Gen E-Star Series 18K BTU, 1.5 Ton, 21.5 SEER2 Ductless Mini-Split Heat Pump System with Ceiling Cassette Air Handler – R-454B

The MRCOOL DIY 5th Gen E-Star Series 18K BTU Mini-Split Heat Pump System delivers next-generation efficiency, low environmental impact, and true do-it-yourself installation. This single-zone package features a premium ceiling cassette air handler for discreet comfort, providing powerful heating and cooling performance without compromising aesthetics.

Unlike traditional wall-mounted units, the MRCOOL ceiling cassette fits neatly between standard 16” ceiling joists, making it the perfect low-profile solution for modern homes and office spaces. This system uses MRCOOL’s latest R-454B refrigerant, offering a lower Global Warming Potential (GWP) and compliance with updated refrigerant regulations.

💡 What’s Included in This Bundle?

✔ MRCOOL DIY 5th Gen 18K BTU, 1.5 Ton, 21.5 SEER2 Heat Pump Condenser
(Model: DIY-18-HP-C-230C)

✔ MRCOOL DIY 5th Gen 18K BTU Ceiling Cassette Air Handler
(Model: DIYCASSETTE18HP-230C25)

✔ Standard 25 Ft. MRCOOL Pre-Charged Quick Connect Line Set – R-454B
(No vacuum or special tools required)

💬 Need a longer line set?
This system comes standard with a 25' pre-charged line set. You can upgrade to a 35' continuous line set with matching control wire for installations requiring a bit more reach without added connections.

For even greater flexibility, extended configurations are also available in 41', 50', or 75' total line lengths. These setups use the included 25' pre-charged line set paired with an additional pre-charged line set connected via MRCOOL Quick Connect® couplers, along with a longer control wire.

This sectional or continuous approach provides easy installation options for every scenario—from simple straight runs to complex or tight routing—while maintaining MRCOOL’s leak-proof reliability and DIY simplicity.

🌡️ MRCOOL 5th Gen Heat Pump Condenser – Key Features

  • 18,000 BTU Output – Ideal for heating & cooling single-zone spaces up to ~750–800 sq ft

  • 21.5 SEER2 High Efficiency – Lower utility costs without sacrificing performance

  • Pre-Charged with R-454B Refrigerant – Eco-friendly, low-GWP refrigerant

  • Gold Fin Condenser Coating – Corrosion-resistant for long outdoor life

  • Cold Weather Ready – Operates in temperatures down to 5°F

  • True DIY Installation – Quick Connect fittings, no vacuum pump needed

  • Warranty – 7-Year Compressor / 5-Year Parts (Lifetime Limited Compressor with registration)

🔲 MRCOOL Ceiling Cassette Air Handler – 18K BTU

  • Flush Ceiling Installation – Fits between 16” joists for a seamless appearance

  • Multiple Comfort Modes – FAN ONLY, QUIET, SLEEP, AUTO for complete control

  • Elevating Air Filter System – Drops up to 4.9 ft for easy, tool-free cleaning

  • Unified Aesthetic – Matches MRCOOL multi-zone cassette design

  • Smart Home Ready – Wi-Fi enabled, works with Alexa & Google Assistant

  • Expandable Design – Visually matches multi-zone setups for future expansion

🔧 Why Choose MRCOOL DIY 5th Gen?

  • No HVAC License Required – Perfect for homeowners & skilled DIYers

  • R-454B Refrigerant Compliant – Ready for new HVAC regulations

  • Pre-Charged Line Sets – No refrigerant handling or vacuuming

  • Energy Efficient – Meets or exceeds ENERGY STAR® guidelines

  • Nationwide Support & Fast Shipping – Buy from the #1 Independent MRCOOL Dealer: MRCOOL DIY Direct

🛒 Order Your MRCOOL 5th Gen DIY Ceiling Cassette System Today!
Experience discreet, high-efficiency climate control you can install yourself. Whether you’re upgrading a bedroom, home office, or guest suite, this 5th Gen DIY mini-split is built for performance, convenience, and compliance.

🔗 Shop now at MRCOOL DIY Direct – stay cool and save the smart, easy way.

Specifications & Dimensions

 

Condenser

Dimensions

26.5" H x 13.46" L x 35.04" W

Voltage

240

SEER

22

Heating Capacity

15,001 - 20,000 BTU

Refrigerant Type

R-454B

Avg Coverage Area

750 - 900 Sq Ft

Compressor

Inverter

 

Air Handler

Dimensions

13.19 in D x 8.98 in H x 50.31 in W

Voltage

208/230

SEER

21.8

Cooling Capacity

17000

Heating Capacity

19000

Refrigerant Type

R-454B

Min Ambient Cool

60F ~ 90F

Min Ambient Heat

32F ~ 86F
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. 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
SKU: 85755445904

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4.8 ★★★★★
Based on 18 reviews
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Product Reviews
J
Verified Purchase
J.J. Caro
Chelsea, US
★★★★★ 5
Nice long sleeve Oxford shirt
Fit Type: Slim Fit, Color: White, Size: Medium
Exactly what I expected plus fast delivery. Amazon essentials offer great value for the price. Note: I wish #Amazon would give points for reviewing items as an incentive just as #AliExpress does.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 3, 2026
K
Verified Purchase
K K Kaumanua
Massapequa, US
★★★★★ 5
Count on shrinkage when choosing your size.
Fit Type: Slim Fit, Color: White, Size: X-Large
I bought this shirt earlier and got an XL. It came and it fit perfectly. Couldn't believe it, but then I wondered what it would look like after one washing. It shrank. Not so bad that I couldn't wear it, but it no longer looked "perfect" and I I don't dare put on 5 pounds. But I liked the shirt overall, so I went back and ordered another, this time an XXL. It came, I tried it on and while it worked, it was slightly larger than I wanted. Instead of returning it, I washed it, and like the first, it shrunk, but it shrunk to a size that looked good and was comfortable. Lesson: you might want to go one size larger than you would ordinarily get, wear it to see how it fits, and if it seems too large, wash it and see if it makes a difference. The first shirt I would give 4 stars because shrinkage took away from it, but I'd give the second 5 stars because even more so after washing, the fit was very nice.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 23, 2025
A
Verified Purchase
Amazon Customer
Cuba, US
★★★★★ 3
Good concept, details need some work.
Fit Type: Slim Fit, Color: Grey, Size: Small
Let's start with the positives. The quality of the cloth is great, it's a heavier cotton, but feels soft and durable. The overall slim fit cut was great too. The shoulders were a tiny bit too boxy for me personally, but I didn't wash it to see if the shirt would shrink and solve that issue. The problem with this shirt is that it doesn't get the details right. It's almost like they just took a regular shirt and decided to produce it in a slim fit instead, without tweaking anything else. It's slightly too long to be left untucked, and for a cloth this heavy, it's not really something that you would really want to wear tucked in. I also find it weird that a slim fit shirt would have a box pleat on the back, since the whole point of a slim fit shirt is for a cleaner look on a trimmer guy. Finally, I like the button-down collar, but would consider hiding the buttons on the back of the collar so that you get a cleaner look. Unfortunately, these misses on the details make this shirt seem outdated. Other than the slim cut, it reminds me of something you might see from the 1990s, along with double pleated chinos. Overall, doesn't seem like a good match for a younger, more stylish demographic that might want to wear a slim fit cut. Despite the great price, I'm definitely returning this one.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 31, 2019
B
Verified Purchase
Buddy Wolf
Los Angeles, US
★★★★★ 5
Very nice winter shirt.
Fit Type: Slim Fit, Color: Blue, Size: Large
These shirts are beyond what I expected. They’re thicker than I thought but not being too heavy. They wear well and they also wash up very well in permanent press and I dry them on permanent press also. No problem with wrinkles. I just take them out of the dryer and hang them up and they look great.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 14, 2025
L
Verified Purchase
Larus
Charlottesville, US
★★★★★ 4
Amazon Essentials Mens shirt review - Good shirt, great value.
Fit Type: Slim Fit, Color: Grey, Size: X-Large
First, this is Oxford. This is a tough fabric that looks a little like pinpoint and feels a little like flannel. That is, it does not have the sheen of a dress shirt and is not as thick and soft as flannel. It hits a nice spot in between. The fabric is soft enough and thick enough to wear casually in the heat of summer. (It is cooler than a very thin and very cheap shirt due to it's absorbancy.) The fabric appears and feels to be quality. The cut is good for me. It is tailored enough to look good tucked in and roomy enough for work and play. The seams are doubled and good quality. I did not find mid seam knots, broken threads, etc. Seams are likely very durable. The Goodthreads shirt is a little more expensive. It is a little thicker and softer. It is almost a flannel. However, the thickness and softness caused it to shrink more in the dryer. It loosened OK as I wore it, but I think after multiple washings and dryings, the Goodthreads may get a little tight. I have no concerns with the Essentials. Good shirt.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 8, 2020

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