Table of Contents
Should You Leave Your Bathroom Exhaust Fan On 24/7?
🎧 Listen to this article
The Observatory predicts that it will continue to rain later this week. During Hong Kong's humid season or rainy season, the bathroom is always a disaster zone—walls seep water, towels get moldy, and there is even a musty smell. Many people ask: "Should the exhaust fan or bathroom heater be left on 24/7?" Some worry about wasting electricity, others fear the machine overheating and catching fire. In fact, according to recommendations from major Japanese home appliance manufacturers, leaving it on is not only key to keeping the home dry, but the cost is much lower than you think.
Japanese Home Appliance Giant: Generally, Leaving It On Is Basic
Japanese home appliance manufacturer RINNAI clearly states on its official website that for bathrooms that are often damp, running the ventilation equipment "24/7 is basic" and should not be turned off for long periods. Although the common "heating dryer" in Japanese homes has multiple functions, the manufacturer emphasizes that all-day ventilation ensures moisture is expelled, preventing water vapor from seeping into the ceiling or walls, fundamentally preventing mold growth and odors.
Running 24 Hours a Month Costs About $30 in Electricity
What most people worry about is the electricity bill. According to estimates from HK Electric and related data, a typical household exhaust fan has a power rating of about 50 watts, consuming about 0.05 kWh per hour. If left on for 24 hours a day for a month (30 days), the total electricity consumption is about 36 kWh. Based on current local electricity rates, the monthly cost is only about HK$28 to $30.
Japanese manufacturers also point out that compared to saving this tens of dollars in electricity bills, which could lead to spending thousands or even tens of thousands in the future to deal with mold throughout the house, repair moisture-damaged furniture, or even pay medical bills for respiratory diseases caused by poor air quality, running the exhaust fan 24/7 is definitely a smart investment.
4 Major Benefits of Keeping Exhaust Equipment Running: More Than Just Dehumidification
In addition to removing moisture, Japanese bathroom equipment retailer "Direct" also summarized four major advantages of keeping exhaust fans running continuously:
- Reduce Odor Accumulation: 24-hour operation continuously brings in fresh air, effectively diluting and expelling mixed odors from bathrooms or kitchens, maintaining indoor air circulation.
- Prevent Condensation and Mold: Controlling humidity is fundamental to mold prevention. Keeping the exhaust fan running prevents water vapor from condensing on walls or ceilings, significantly reducing the effort and time spent on cleaning and mold removal.
- Extend Furniture Lifespan: In Hong Kong's small homes, bathroom humidity can easily spread to the living room. Maintaining ventilation helps protect wooden furniture at home, reducing deformation or damage caused by moisture.
- Reduce Dust and Allergens: The airflow generated by the exhaust fan carries away fine particles and dust in the air, helping to keep the environment clean for family members with hay fever or dust sensitivity.
"Oil" Every 2 Years and Regular Cleaning
Although the exhaust fan is designed to be moisture-proof and suitable for long-term operation, the chairman of the Hong Kong and Kowloon Electrical Engineering and Equipment Trades Union reminds that aging and insufficient lubrication are the real risks. If the exhaust fan's components rust, become loose, or lack lubricant, the motor may "idle and generate heat" because it cannot drive the bearings, which could lead to a fire in severe cases.
Expert recommendations:
- Regular lubrication: Add an appropriate amount of lubricating oil to the exhaust fan every two years.
- Replace old units: If the exhaust fan is too old or makes abnormal noises, it is not advisable to keep it running; it is recommended to replace it directly.
- Proper cleaning: Disconnect the power when cleaning. Detachable blades and plastic frames can be cleaned with detergent to dissolve dirt. When cleaning the back blade, be careful not to let water flow into the transformer area; you can wrap it with plastic wrap for protection.
Decoration Consultant Kingsly Appears on Show to Share Moisture Prevention Tips
Regarding how to create a comfortable and dry home, "Decoration Master" decoration consultant Kingsly, when appearing as a guest on TVB Plus home information program "Home In" Season 2, specifically mentioned the importance of bathroom exhaust. Kingsly pointed out that many families overlook the small exhaust fan, which actually plays an important role in maintaining the home structure.
She also suggested that if a home has an exhaust fan, it is best to keep it running 24 hours a day, which can effectively remove residual moisture, reduce bacterial growth, and protect the decoration results. In the show, she not only shared moisture prevention tips but also explained smart toilet installation, kitchen layout planning, and characteristics of different decoration styles. Kingsly and the "Decoration Master" team have been committed to bringing the most practical decoration information to the general public, helping everyone avoid detours on the decoration journey.
Kingsly shares home tips on the program Qing Jia · Ru Zhai
[Editor's Pick Articles]
From renovation quotes to pre- and post-move-in, one-stop comprehensive support!
>> Get Free Renovation Quote: https://hkdecoman.com/measure
>> Book Home Clinic (Property Inspection/Cleaning/Repair): https://clinic.deco-x.com/
Special sections for various property types:
>> Public Housing https://decoman-publichousing.com/
>> Private Housing https://decoman-privatehousing.com/
>> First-hand New Properties https://decoman-newproperties.com/
>> Tenement Buildings https://decoman-tenement.com/
================================================================
*** This article is republished with permission from Deco-Man ***
