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Category: Ducted Air Conditioning

link to Duct CFM Chart | Round & Flex Duct | Calculation Guide

Duct CFM Chart | Round & Flex Duct | Calculation Guide

Many people want to have a quick check on the duct size for a given CFM without going through complex calculations. Hence, I thought providing some duct CFM charts would be helpful. Generally, the...

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link to How to Calculate Static Pressure in a Duct?

How to Calculate Static Pressure in a Duct?

A fan must have enough external static pressure to deliver the required airflow in a duct system. Hence, the static pressure in the duct must be determined. So, how do you calculate static pressure...

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link to How to Measure Airflow in HVAC? (Register & Duct)

How to Measure Airflow in HVAC? (Register & Duct)

Low airflow is a common problem in HVAC that lead to insufficient heating/cooling. Many people want to fix their HVAC by themselves to save money. But, they are not sure how to measure the airflow...

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link to What is VAV in HVAC?

What is VAV in HVAC?

If you're working in the HVAC industry for a while, you probably heard the word VAV. So, what exactly is VAV in HVAC, how does it work and why do we use a VAV? VAV stands for variable air volume....

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link to Ducted Mini Split Guide: Basics, Comparison & Installation

Ducted Mini Split Guide: Basics, Comparison & Installation

Mini splits can be ducted. Mini splits don't always have to be ductless. Since mini splits are new in certain regions, people have a lot of questions, particularly on ducted mini splits. So, I did...

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link to HVAC Ductwork Design Guide (Layout, Duct Size & CFM)

HVAC Ductwork Design Guide (Layout, Duct Size & CFM)

Designing HVAC ductwork requires experience and broad knowledge about ducted air conditioning. Some people want to learn how to design HVAC ductwork, especially for residential. So, I decided to try...

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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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