MRCOOL’s recent addition to their MRCOOL DIY Series is their best mini split to date! The release of MRCOOL's 5th Generation DIY Mini Split System Series comes with high efficiency bonuses and features. The 5th Generation Ductless Mini Split adds improvements and changes from the previous 4th Generation Mini Split System.
This blog will discuss the improvements to the MRCOOL 5th Generation Mini Split System.

The 5th Gen DIY uses the industry leading R-454B refrigerant. This differs from the R-410A refrigerant that the 4th Generation used. R-410A refrigerant has extremely high global warming potential (GWP).
The R-454B refrigerant is the newest refrigerant in most HVAC systems. Newer systems use this refrigerant because it has a lower climate impact than previous refrigerants. By using the R-454B refrigerant, the 5th Gen decreases the potential of releasing GWP by about 80%. The complete system can also run with higher efficiency using R-454B refrigerant.
Read more about the 5th Generation DIY using the R-454B refrigerant here.
With the recent improvements and changes, the SEER2 rating for the 5th Gen Series increased compared to previous models. With a 23.6 SEER2 rating, MrCool's new DIYs have better performance and greater energy efficiency. With a 5th Gen unit, you'll spend less on energy year-to-year compared to older models.
5th Generation Mini Splits achieve a high HSPF2-4 rating of 11.5. Most air conditioners with a HSPF2-4 of a 9 or higher are highly efficient products. This makes the 5th Gen Mini Splits some of the most efficient mini splits on the market.
The improvements in the MRCOOL 5th Gen Series have allowed the system to increase the number of zones it can reach. Now the 5th Gen can reach up to 6 zones while the 4th Gen can only reach 5 zones. More zones means more flexibility.
Thanks to expanded ports, new DIY multi-zone condensers can support 3 to 6 indoor units.
MRCOOL is also adding new expanded system sizes to the 5th Generation Series. Current MrCool DIYs have two new system sizes to choose from. This includes new single-zone or multi-zone DIY 9K BTU models. Secondly, MrCool now offers a 6K BTU air handler for wall mounted, multi-zone installations.
These new models give you even more control over installations. Use MRCOOL's Quick Connect line set to have a better installation without needing special tools.
One of the more exciting features of the 5th Generation Series is enhanced controls. The MrCool SmartHVAC app allows you to control your mini split systems from a phone and connect it to Google Assistant or Amazon's Alexa. Control compatible ductless heat pump systems with a couple taps from anywhere with internet access.
Another feature of the 5th Generation is the MRCOOL DIYPro Cable. The DIYPro cable creates better communication which increases performance over the 4th Gen Series.
One of the additional features that the DIY 5th Gen Series has is a quieter noise level. The 5th Gen performs at lower decibels indoor and outdoors compared to the 4th Gen Series. Enjoy peace of mind with less noise during operation.
DIY 5th Generation models are also compatible with cassette unit ceiling mounts. The installation process is very simple and is available for single- and multi-zone options.
Even better, MrCool offers a 7-year compressor warranty and a 5-year parts warranty for all 5th Generation units.
MRCOOL's DIY 5th Gen Series ranges from 9,000 BTU to 36,000 BTU. You can't go wrong upgrading your system with MrCool DIY mini split systems! Find MRCOOL’s 5th Generation DIY Series today at HomElectrical!
MrCool’s 5th Gen DIY Mini Split offers powerful, eco-friendly cooling and heating with easy installation and smart features. With new compact sizes and high energy efficiency, it’s perfect for keeping your home comfortable year-round.
Ductless mini split systems provide heating and cooling without using air ducts. Learn more about their installation and operation with these frequently asked questions.
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