Learn how an Electronic Expansion Valve (EEV) helps modern inverter mini-splits deliver more stable temperatures, higher energy efficiency, stronger cold-weather heating performance, and quieter operation. Discover how the EEV works with the compressor and sensors as part of TOSOT's advanced climate control system.

SEER2 is the latest U.S. standard for measuring how efficiently an air conditioner or heat pump performs in real-world conditions. A higher SEER2 rating means lower energy use, reduced electricity bills, and more consistent comfort. In this guide, we break down what SEER2 means, how different levels compare, and how to choose the right TOSOT mini-split for your space and lifestyle.

When a heat pump blows cold air in winter, it doesn’t always mean a failure. In many cases, the system is running defrost mode to maintain efficiency in cold, humid conditions. This article explains what’s normal and when to contact an HVAC professional.