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Category: Ducted Air Conditioning

link to HVAC Diffuser Sizing Guide: CFM Chart & Selection

HVAC Diffuser Sizing Guide: CFM Chart & Selection

Supply air diffusers are critical to HVAC air distribution system. Inappropriate supply air diffusers can cause the entire HVAC system to perform poorly. So, how do you size and select a supply air...

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link to What is a Chilled Water Fan Coil Unit?

What is a Chilled Water Fan Coil Unit?

A chilled water fan coil unit is one of the two kinds of fan coil units. It comes in different forms and types. So, many junior engineers are trying to understand chilled water fan coil units. Hence,...

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link to Duct Insulation Guide: How-to, Selection & Thickness

Duct Insulation Guide: How-to, Selection & Thickness

Insulations are very important for air conditioning ducts. However, many people struggle to find information and guide on how to select and insulate ducts. So, I decided to write about it. To...

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link to How to Calculate Duct Size? (Round & Rectangular)

How to Calculate Duct Size? (Round & Rectangular)

HVAC ducts are sized based on the required airflow. Undersized ducts can lead to all sorts of airflow problems. Some people like to use round ducts while others use rectangular ducts. So, how do you...

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link to Return Air Grille Sizing Guide: CFM Chart & Calculation

Return Air Grille Sizing Guide: CFM Chart & Calculation

There are many different sizes available for a return air grille. Using the correct return air grille size is important to ensure that the HVAC system has sufficient airflow as well as low noise. So,...

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link to Can Mosquitoes Come Through Air Conditioner Vents?

Can Mosquitoes Come Through Air Conditioner Vents?

It is annoying when a mosquito buzzing around my ear when I sleep. It makes me wonder, can mosquitoes come through vents? So, I did some research. Mosquitoes can come through vents. Mosquitoes can...

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About Me

My name is Yu Chang Zhen. I'm an HVAC professional with more than 7 years of practical experience, covering from design and installation to service and maintenance. I'm also a project manager and hot water heat pump specialist. Thus, my sharing of knowledge on this website not just about HVAC but also include project engineering, construction and hot water system.

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