Negative air pressure is one of the primary causes of ventilation imbalance in buildings. This article explains its causes, its adverse effects on ventilation performance and air curtain efficiency, and the methods used to restore pressure balance.

Mitsuei Gas-Fired Air Curtain, specially designed for large industrial doors where heat loss is significant and maintaining a comfortable indoor temperature is a challenge.

Mitsuei Jet Body Dryer – energy-efficient, continuous-duty, and whisper-quiet. The perfect replacement for noisy and inefficient hair dryers in swimming pools, gyms, and spas.

One of the Best Solutions for Temperature Control in Cold Storage This guide, based on research and hands-on experience, is designed to help you improve the efficiency of your cold storage facility.

Discover the story behind Mitsuei and the evolution of air curtain technology, as told by Mr. Jerang, Director of Mitsuei Industrial Group and one of Iran’s pioneers in the HVAC industry.

Tehran HVAC Exhibition 1404 (2025): The Mitsuei booth welcomed valued visitors and partners — a great opportunity to showcase our latest innovations in heating, ventilation, and air conditioning.