AC TIPS & ADVICE
Use and selection Practical AC knowledge
Based on manufacturer information and site conditions, learn how to use the AC, judge faults, maintain it, choose a unit and save energy
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Showing articles 601–624 of 702 · Page 26 of 30
Can I use the air conditioner during red rain? First check for water ingress, power supply, and abnormal unit conditions
Red rain is a weather warning, not an air conditioner safety certification; understand the warning according to the Observatory's definition, and distinguish when to stop using it, avoid operation in water, or go outdoors to cover the unit
Energy label | Understanding air conditioner energy label grades
The energy label helps consumers assess an air conditioner's energy-saving performance; choosing according to the grade can save electricity and reduce energy loss
Smells worse after spraying foam on your air conditioner? Follow-up on residue, drainage, and safety
A bad smell after spraying does not necessarily mean more mold; distinguish the product’s intended use, drainage and other sources. Do not rinse with pressure or mix chemicals again yourself. If anything is abnormal, stop using it first and state what product was used
Hidden costs and risks of dismantling your own air conditioner
Dismantling an air conditioner yourself involves risks of electric shock, refrigerant leakage and property damage, and should be handled by professionals with the necessary skills and tools
Lower-floor air conditioners in older buildings easily draw in roadside exhaust
Analyse how street pollutants affect air conditioners in lower-floor units, and recommend professional deep cleaning
Comparison points for maintaining an old unit versus replacing it with a new one
Analyse the considerations for regular maintenance versus replacing an old air conditioner, to help users make the right choice
The outside of the air conditioner is clean, but does the inside need cleaning? First check the dirt buildup and operating condition
A clean casing does not mean the fan wheel or drainage parts are clean; black spots and odours cannot confirm the type of bacteria. Residents should not dismantle the unit. Cleaning does not guarantee sterility or cure allergies
Need to drill holes for AC installation? Residents should first confirm the location, piping and scope of works
Do not judge drilling for air conditioner installation only by height ratios or by eye to avoid pipes; the location, structure, drainage and property arrangements should be assessed by the appropriate personnel, and residents should not drill the wall themselves
Is blurry video definitely caused by the air conditioner? Check the lens, lighting and settings first
Blurry video cannot be directly blamed on dust in the air conditioner; check the lens surface, focus, lighting, software and network separately. AC cleaning does not guarantee better image quality.
An in-depth explanation of why AC performance drops and how to solve it
This guide analyses the causes of reduced air-conditioning performance and highlights the importance of professional maintenance
Pros and cons of inverter AC | A complete in-depth analysis
Analyse the technical features of inverter air conditioners and the considerations for energy saving, comfort and cost
What is the difference between inverter AC and split AC? Explanation of technology and model classification
Inverter is a compressor control method, while split type is an air conditioner structure; compare inverter and non-inverter, window and split models separately, and use the energy label to compare models
How does an inverter AC work? Comparison with fixed-speed units and buying tips
Inverter and non-inverter refer to compressor control methods, while window and split refer to the unit structure; choose based on the Hong Kong energy label, cooling capacity and usage conditions
Trying to save money by installing a smaller unit? The hidden cost of an AC that is too small
Analyse the performance, energy use and service-life issues caused by a mismatch between air conditioner capacity and space requirements
Buying AC blankets | 7 key points to help you choose the right AC blanket
This article lists seven key factors to consider when buying an air conditioner and explains the importance of professional AC cleaning services in improving home comfort
Headache after waking up and the AC duct: without testing, bacteria cannot be said to exceed limits
Clarify the difference between headaches, internal dirt buildup in the unit, and microbial testing; maintenance can deal with dirt on the equipment, but it does not guarantee better sleep or cure symptoms
Router overheating caused by uneven heat dissipation from the air conditioner
Dirt buildup inside the air conditioner duct can obstruct air circulation and affect the heat dissipation performance of indoor electronic devices
Is Legionnaires' disease related to air conditioners? Understand the difference between cooling towers and home units
Use Department of Health information to distinguish Legionnaires’ disease spread through contaminated water sources from the risks involved; do not treat stains on a domestic unit as proof of bacteria, and AC cleaning does not replace water system management or medical treatment.
Air Conditioner Performance, Energy Saving and Brand
When buying an air conditioner, consider performance, energy efficiency and brand. Help from a professional team can ensure correct installation and daily maintenance
Key Factors When Buying an Energy-Saving Air Conditioner
This article gives a detailed introduction to the key factors to consider when choosing an energy-saving air conditioner, including energy efficiency, cooling capacity, inverter technology and quiet operation.
If a senior feels the AC is too cold: adjust airflow direction, settings and equipment condition separately
Do not assume feeling cold means the ducts are dusty. First check direct airflow, settings, and actual comfort. Cleaning does not guarantee even airflow or change a person’s tolerance to cold.
Musty smell or stains in a senior's AC room? Maintenance and health assessment should be handled separately
Stains on an air conditioner do not mean a pneumonia risk has been confirmed; if an elderly person feels unwell, seek medical attention. For the equipment, handle dirt buildup and drainage based on the unit condition, and do not claim that cleaning makes the unit sterile or disease-preventive
AC Cool vs Dry mode comparison
This article compares the operating mechanisms of Cool and Dry modes on an air conditioner, and explains how to choose the right mode based on need
How long can you run the AC before you need to open a window for ventilation?
This article analyzes the impact of a sealed air-conditioned environment on indoor air quality and provides scientific ventilation advice