标签：Ventilating - 英国华人论坛

While it is a term commonly used by contractors and home improvement hobbyist, not everyone knows what HVAC means.  HVAC is actually an acronym that stands for "heating, ventilating, and air conditioning."  (Yes - it is also an acronym for...英国华人论坛

Heating, ventilating and air conditioning are the three main aspects of HVAC systems. In some structures, this is sometimes combined with the additional refrigeration aspect if there is a need to freeze or keep frozen things or units which a...英国华人论坛