Skip to content

MRCOOL DIY 5th Gen Ceiling Cassette (12K-12K-12K) 3-Zone 36,000 BTU Ductless Mini Split Heat Pump & AC

Marsoni M251S
Sale price$3761.50
Pay 4 payments of $940.38 a month.Shop Pay
Get it in 3 business days with 1 day shipping. Friday, May 29
MRCOOL DIY 5th Gen Ceiling Cassette (12K-12K-12K) 3-Zone 36,000 BTU Ductless Mini Split Heat Pump & ACThe MrCool DIY 3 Zone Mini Split featuring a 12K 12K 12K configuration is a versatile system ideal for 3 efficient bedrooms or home offices. Driven by a robust 36k condenser, this setup provides high capacity cooling that easily manages heavy heat loads across multiple rooms. Optimized for single story homes or targeted floor coverage, this three zone system ensures you stop wasting energy on empty rooms. It grants independent control to your most
Easy Shipping

Quick Dispatch:

Your MRCOOL DIY 5th Gen Ceiling Cassette (12K-12K-12K) 3-Zone 36,000 BTU Ductless Mini Split Heat Pump & AC orders ship within 1-2 business days.

Delivery Options:

  • Standard: 3-7 business days
  • Fast: 2-3 business days
  • Express: 1-2 business days

Order Tracking:

You'll receive a tracking link by email once your MRCOOL DIY 5th Gen Ceiling Cassette (12K-12K-12K) 3-Zone 36,000 BTU Ductless Mini Split Heat Pump & AC ships.

Need Help?
Questions about MRCOOL DIY 5th Gen Ceiling Cassette (12K-12K-12K) 3-Zone 36,000 BTU Ductless Mini Split Heat Pump & AC, sizing, or delivery? We're just an email away.

Live Shipping Estimates:
Enter your location at checkout to see available shipping methods and costs for MRCOOL DIY 5th Gen Ceiling Cassette (12K-12K-12K) 3-Zone 36,000 BTU Ductless Mini Split Heat Pump & AC in your area.

Get Shipping Estimates

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
4.6 ★★★★★
Based on 449 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
B
Verified Purchase
Belle of the Ball
Lexington, US
★★★★★ 5
Works wonders
I've been buying these for well over a year now as Subscribe and Save. I work 12 hour overnights as a nurse. My sleep schedule normally gets messed up. I would have no problem falling asleep but would wake up only a few hours later which is not good when you have work again that night. We buy these on Amazon due to the great price and the fact that they are extended release which helps keep me asleep longer. When I take 1 or 2 of them, I am able to sleep about 7-8 hours which is great. I take this both when I sleep during the day and sleep during the night. It helps me sleep no matter when and I am able to adjust my sleep schedule often. I have recommended them to many.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 10, 2013
P
Verified Purchase
PSBone
New York, US
★★★★★ 4
Works quite well, dose still a bit high for me
Used to take the Natrol 5mg slow release, now that I can compare these 2, I love this more. It doesn't make me feel too edgy, it's quite relaxing actually. I still have to halve the dose as the full dose makes me groggy the next day. Where the Natrol gave me very vivid, but not unpleasant dreams, these don't make me dream as vividly. It does take a bit longer to get me to sleep, but once asleep, your asleep. Highly recommend, once I finish this bottle, I'd get the 2mg tr next time, as a lower dose works better for me.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 10, 2014
E
Verified Purchase
Eudy Ernesto De León Batista
Lexington, US
★★★★★ 5
Excelente Muy Satisfecho
Servicio excepcional, cuidadoso, el producto muy bien empacado. Y el tiempo de entrega fue el acordado. Y del producto ni hablar, excelente.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 3, 2026
D
Verified Purchase
Dog Mom
Omaha, US
★★★★★ 5
seems to work just fine
Helps me sleep. I also use Mg, B complex and medical cannabis oil before bed. My sleep isn't great otherwise here in the good ol' USA (unlike in Europe where I sometimes go for complicated issues/not vacation; which indicates issues with the much higher radiofrequency exposure allowed in the US than in the European country where I sleep like a happy baby). Just wait for 5G, then I probably need to reinvent my sleep protocol if I want to get any rest. But well, with the 5G impact on the biosphere, we may not be here much longer then. That means we better stop 5G before it's all roleld out.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 2, 2019
S
Verified Purchase
S.J.
Omaha, US
★★★★★ 5
The product is worth purchasing!
I find that the time release melatonin works for me. The cost is reasonable, shipping directly to the home works well.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 6, 2025

recommand products