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Category: Maintenance

link to How to Cover Air Conditioner Pipes?

How to Cover Air Conditioner Pipes?

Air conditioner pipes often run on the house exterior wall. But, many people find it ugly and they want to cover it up nicely. So, how do you cover air conditioner pipes properly? To cover air...

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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 Chiller Surge: Symptoms, Causes & Preventions

Chiller Surge: Symptoms, Causes & Preventions

Chiller surge is a problematic behaviour in buildings that are equipped with a chilled water system. Operators and engineers are having a hard time figuring out why chiller surge is happening. So, I...

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link to Why HVAC Air Vents are Noisy and How to Fix Them?

Why HVAC Air Vents are Noisy and How to Fix Them?

A properly designed HVAC system should not produce unpleasant noise. Usually, problems such as rattling and whistling noise are not a big deal. People are seriously frustrated with a really loud air...

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link to Hydronic Balancing Basics (Chilled Water System)

Hydronic Balancing Basics (Chilled Water System)

Hydronic balancing is important to the efficiency and effectiveness of chilled water system. However, many engineers find it very difficult to understand. So, I did some intensive studies. Liquid...

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link to What is Net Positive Suction Head? (Centrifugal Pump)

What is Net Positive Suction Head? (Centrifugal Pump)

A sufficient net positive suction head is one of the requirements of centrifugal pumps. Without it, centrifugal pumps will not move water and cavitation may occur thereby damaging the pumps. So, I...

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About Me

Hi, my name is Yu Chang Zhen. I've been working as a professional in the HVAC industry for more than 7 years, covering from design and installation to commissioning and maintenance. With my experience, I want to help people solve their HVAC problems. Welcome, I hope you can find your solutions here.

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