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Ships within 48 hours · Estimated delivery Aug 5 - Aug 10
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Description
MRCOOL DIY 5th Gen 4-Zone 39,000 BTU Ceiling Cassette Ductless Mini Split Air Conditioner & Heat Pump with Pre-Charged Line Sets (9K+9K+9K+12K), DIYM455HPTake control of your comfort with the MRCOOL DIY 5th Gen Multi Zone Mini Split System the easiest and most affordable way to get powerful, energy saving heating and cooling without hiring a pro. Four Rooms, Perfect Comfort: Heat or cool four spaces that are 350 sq. ft., 350 sq. ft., 350 sq. ft. and 500 sq. ft. each with independent temperature control for personalized comfort. Truly DIY Friendly: Forget expensive installs no HVAC license or special
Take control of your comfort with the MRCOOL DIY 5th Gen Multi-Zone Mini Split System - the easiest and most affordable way to get powerful, energy-saving heating and cooling without hiring a pro.
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Four Rooms, Perfect Comfort: Heat or cool four spaces that are 350 sq. ft., 350 sq. ft., 350 sq. ft. and 500 sq. ft. each with independent temperature control for personalized comfort.
- Truly DIY-Friendly: Forget expensive installs - no HVAC license or special tools required. If you can use basic hand tools, you can do this.
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No Hassle Setup: Comes with pre-charged Quick-Connect® line sets, so there’s no messy refrigerant handling or vacuuming. Just connect and enjoy.
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Year-Round Savings: Boasting up to 22.0 SEER2 cooling efficiency and 10.6 HSPF2-4 heating performance, this system delivers serious energy savings.
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Built for Every Season: Stay cozy even in the dead of winter - reliable heating works all the way down to -13°F.
- Strong Warranty Protection: Includes 7-Year Compressor Replacement and 5-Year Parts Coverage.
Whether it’s hot summer days or freezing winter nights, the MRCOOL DIY Mini Split keeps your home comfortable and your energy bills low. Smart. Simple. Affordable.
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
4.3 ★★★★★
Based on 7 reviews
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Product Reviews
★★★★★ 5
Nice set of knives. Love it.
Size: Ivory Series 15Pcs 14.43''×9.36''×6.63'', Size: Ivory Series 15Pcs 14.43''×9.36''×6.63''
Great quality, they are very nice set. The price is right. Looks beautiful in my kitchen. Love it.
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Reviewed in the United States on May 17, 2026
★★★★★ 5
Very nice knives for the price, with additional options in the same pattern!
Size: Steel King 15Pcs 10.4"×7"×15.4"
It’s been 10 months, so I feel like I can finally give a decent opinion on this knife set. First of all, I really appreciate how sharp they are out of the box. The set of different blade shapes suits my needs quite well, with the exception of the bread knife, which I swapped in the block for Brodark’s deboning knife. I also added their breaking butcher knife, cleaver, and brisket slicer to my collection, all which match the handle style for this set. (I really liked that I could get the same pattern for some additional blades to expand my kitchen set without getting a different pattern.)
The knives should never go through the dishwasher - I tested with one of the steak knives and water spots rusted lightly. I was able to buff the stains out, but the “high carbon stainless steel” is definitely as described. When used normally I do soap and water cleanup, dry, then back in the block without issues. I have honed the chef and slicing knives so they glide through food more easily, but they retain their edges well enough I haven’t needed to repeat the process in normal use.
The block is quite heavy and very durable, but still has a rather compact space use as it stands pretty close to vertical. I have mine pulled forward on the counter as our cabinets are rather low, and there is no hint of instability when drawing or resheathing blades. The finish is quite nice, and no need for touchups or worry about the blades wearing in the slots like softer wood blocks can have happen. All the blades fit well in their respective slots. You do need to grip the handles by the ends to draw some of the blades as there are a lot of tools in close proximity, and my fingers and hands are large.
I got my set last Black Friday. With the prices and discounts that keep popping up, you could still get a pretty good price most of the year. If you want the option for additional knives of similar handle pattern, do a quick Amazon search for ‘Brodark knife’ and check their options. There have been a lot of good spot sales lately!
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Reviewed in the United States on September 23, 2025
★★★★★ 5
Very nice knife set.
Size: Steel King 15Pcs 10.4"×7"×15.4", Size: Steel King 15Pcs 10.4"×7"×15.4"
Got these as a Christmas present and they are a very nice set of knives. They are very sharp so be careful when taking them out of the little sleeves they come in. The wooden base is surprisingly heavy and does a great job at holding the knives without sliding around. The built in sharpener works good to fine tune the edge with just a gentle pull through the ceramic side. They also come with a lifetime warranty which is nice.
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Reviewed in the United States on January 31, 2026
★★★★★ 5
Great Knives
Size: 12-pc, Color: Gray
These are great knives.
Sharp as can be.
Be careful.
Wash delicately & don't put them down point first in dishwasher. Lay them down flat. The point is sharp and could bend or get bent. Point is sharp as hell and thin.
But very hardy strong knives
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Reviewed in the United States on May 30, 2026
★★★★★ 5
Better than what we were using.
Size: 7-pc, Color: Brown
I grew tired of going for a knife only to find that what we had were dull, pitted and bent tips. So I gathered them all up, sorted through them and threw the worst of the worst out. Discovered long ago that those expensive knife sharpeners don’t work either. So I purchased this set as a throwaway set. I’ll use them until they too have seen thier better days and then buy another set.
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Reviewed in the United States on June 4, 2026
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