Sheet metal ducts, fibreglass lined ducts, and fiberboard ducts are the three basic forms of rigid ducting.
Duct design accessories are used in the construction of ducts or air ducts. Duct designs can be considered as one of the most important parts of a building. They are designed to provide adequate airflow, providing cooling and heating for the building.
Typically, the connection pipe is covered with insulation and metal sheet metal to prevent condensation forming inside it. There are some types of connections that have a metal sleeve at this point that helps in preventing corrosion when water or other liquid seeps into them through cracks in the insulation or metal sheet metal coating on them.
There are two types of connection pipes, which are called the supply, and return type. The supply pipe is a long pipe that connects with the outside air or outside unit, while the return pipe is a shorter one that connects your home's ducts to an inside unit.
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HVAC TECHNICIAN knowledge video
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so far,the course and content is good,teacher is looking a bit unexperienced and anxious
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