This blog post systematically introduces four common HVAC terminal units, including Variable Air Volume (VAV) boxes, Constant Air Volume (CAV) boxes, Fan Coil Units (FCUs), and air diffusers. It illustrates their working principles, advantages and disadvantages, and typical application scenarios. Furthermore, the article provides a practical equipment selection guide to
Air diffusers are core terminal components of commercial HVAC systems, directly impacting indoor air quality, occupant thermal comfort, acoustic performance, and building energy efficiency. Many commercial building issues including uneven temperatures, stuffy areas, draft complaints, excessive noise, and high operational costs stem from improperly selected diffusers rather than system design
HVAC coil maintenance is the cornerstone of efficient heating, ventilation, and air conditioning system operation. Dirty evaporator and condenser coils clogged with mineral scale, grease, dust, and biofilm directly reduce heat transfer efficiency, increase energy consumption, trigger frequent system breakdowns, and shorten equipment service life. Selecting the right coil cleaner—either
