The fourth generation DIY 36K is now even more efficient, versatile and easy to install so you don't need any special tools or training to install this high efficiency heat pump. It was designed so that anyone can easily install a MRCOOL DIY in only a few short hours without problems. You save money by installing the air conditioner yourself and also on the rebates available for ENERGY STAR models! The MRCOOL DIY 36,000 mini-split is the most cost efficient air conditioner on the market today. When appropriately sized this system is the ideal DIY solution for a 1,550 square feet area. The MRCOOL DIY includes the new SmartHVAC Wi-Fi module that features a simple setup process, improved functionality and also works with both Amazon Alexa and Google Assistant. If you want great air comfort without paying for installation, you want a MRCOOL DIY Series ductless heat pump!