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Find answers to common questions about HENGJHU products and applications, including product selection, functional differences, application conditions, installation considerations, and basic evaluation direction.

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Windproof Vent Cover FAQ

Common questions about exterior exhaust outlets, strong wind backdraft, odor return, rain intrusion, and the difference between windproof vent covers and standard vent caps.

Exhaust Performance and Backdraft

Will a Windproof Vent Cover affect exhaust efficiency?
Not necessarily. The key is whether the vent cover is properly designed. A vent cover with airflow guidance can help reduce back pressure and resistance caused by strong wind, supporting more stable exhaust performance in windy environments.
Why does backdraft or odor return happen at an exterior exhaust outlet?
When strong outside wind blows directly into the exhaust outlet, or when the outlet lacks airflow guidance and pressure control, discharged air may be pushed back indoors, causing backdraft, odor return, or unstable exhaust.
What is the difference between a Windproof Vent Cover and a standard vent cap?
A standard vent cap usually provides basic coverage. A Windproof Vent Cover focuses more on airflow guidance, rain protection, and pressure stability, helping maintain a more stable exhaust condition under strong wind.

Rain Protection and Installation

Can a Windproof Vent Cover help reduce rain intrusion?
If rain intrusion is related to wind direction, exhaust outlet position, or an exposed wall surface, a vent cover with wind and rain guidance is worth evaluating. Duct slope, exterior wall sealing, and outlet location should also be checked.
Which spaces are more suitable for a Windproof Vent Cover?
High-rise buildings, wind-facing walls, coastal areas, and exterior exhaust outlets often exposed to strong wind are suitable for evaluation, especially if backdraft, odor return, or rain intrusion has occurred.
What should be checked before installation?
Check duct diameter, duct direction, exhaust outlet position, exterior wall sealing, waterproof finishing, and future maintenance access before installation.

Anti-smog Window Screen FAQ

Common questions about PM2.5, indoor air quality, daylight, ventilation, differences from regular screens, suitable spaces, cleaning, and daily use.

Air Quality and Filtration

Why are more people paying attention to indoor air quality?
People spend more time indoors, while urban traffic, dust, pollen, and window-opening habits can all affect daily comfort. Indoor air quality has become part of modern residential comfort.
Can an Anti-smog Window Screen improve PM2.5 conditions?
It should not be understood as a complete air purifier. Its more suitable role is to help reduce outdoor dust, pollen, and some airborne particles from entering indoors when windows are opened, while keeping basic natural ventilation.
Will it affect daylight and airflow?
Because it includes a filtering function, airflow feel and visual transparency may differ from a regular screen. The key is whether filtration, daylight, airflow, and daily comfort are balanced.

Screen Difference and Daily Comfort

How is it different from a regular window screen?
A regular screen mainly keeps insects out and provides basic ventilation. An Anti-smog Window Screen also considers dust, pollen, airborne particles, and indoor air quality.
Is it just a denser screen?
No. Simply making a screen denser may reduce airflow and daylight. A more complete anti-smog screen design considers fiber structure, particle capture, airflow, transparency, and daily comfort.
How is it different from an air purifier?
An air purifier mainly handles indoor circulating air. An Anti-smog Window Screen helps reduce dust and airborne particles entering from outside when windows are opened. They serve different roles and do not replace each other.

Suitable Spaces and Cleaning

Which spaces are suitable for Anti-smog Window Screens?
Spaces that often open windows, face roads, collect visible dust, or are used for long periods are suitable for evaluation, such as bedrooms, living rooms, studies, and road-facing windows.
Should every window use an Anti-smog Window Screen?
Not necessarily. It is usually better to start with windows that are often opened, have visible dust nearby, are in long-stay spaces, or are most related to air-quality concerns.
Does it need regular cleaning?
Yes. Regular cleaning and inspection are recommended. Long-term dust buildup may affect airflow and daily use.

Basilisk FAQ

Common questions about self-healing materials, waterproofing reinforcement, crystalline waterproofing, long-term waterproofing, international cases, and application evaluation.

Waterproofing and Self-healing Concept

How is Basilisk different from general waterproofing materials?
General waterproofing materials often focus on surface blocking or coating protection. Basilisk follows a self-healing material concept, focusing on whether the material can continue working when cracks and moisture conditions appear.
Is Basilisk the same as crystalline waterproofing?
Not exactly. Traditional crystalline waterproofing mainly forms crystals through chemical reactions to fill pores. Basilisk focuses more on self-healing logic after cracks appear. Evaluation should still consider crack conditions, environment, and repair goals.
Why should long-term waterproofing not rely only on surface coatings?
Surface coatings can provide protection, but if the substrate has cracks, water paths, or long-term moisture exposure, surface sealing alone may not solve the root issue. Long-term waterproofing should consider the material body, crack behavior, and maintenance.
What is a self-healing material?
A self-healing material is a material system that can produce further repair action for cracks or small damage under specific conditions. For Basilisk, the key is not only surface waterproofing, but whether the material can continue to act after cracks appear.

Strength, Durability, and Application

Will Basilisk affect the original material strength?
No. Basilisk is intended to support crack repair, waterproofing reinforcement, and water tightness. It does not change the basic strength logic of the original concrete or mortar.
Is it suitable for high-salt or coastal environments?
It can be evaluated. In coastal or chloride-risk environments, crack-related moisture and harmful substance intrusion require more attention. Material evaluation should consider long-term durability and structural protection, not only surface waterproofing.
Are Basilisk international cases useful references?
Yes. International cases help explain how Basilisk may be applied in different project settings. Actual use should still consider local site conditions, substrate condition, crack type, and construction needs.

Bathroom Ventilation Equipment FAQ

Common questions about Bathroom Heater Fans, Bathroom Exhaust Fans, moisture, drying, ventilation, and odor control.

Selection and Daily Use

How should I choose between a Bathroom Exhaust Fan and a Bathroom Heater Fan?
If the main needs are daily moisture exhaust, ventilation, and odor removal, a Bathroom Exhaust Fan is more focused. If winter heating, drying assistance, cool air, and integrated control are also needed, a Bathroom Heater Fan may be more suitable.
For a bathroom that stays humid for a long time, which equipment should be considered first?
If the issue is long-term moisture, slow drying, and insufficient winter comfort, a Bathroom Heater Fan with heating, drying, and ventilation functions is usually worth evaluating first.
If I only want to improve odor and ventilation, is an exhaust fan enough?
In many cases, yes. If the main needs are odor removal, daily ventilation, and faster moisture discharge, an exhaust fan can usually meet basic needs.

Steam Generator / Steam Room FAQ

Common questions about quotation preparation, dedicated circuits, cold water supply, generator location, steam piping, steam outlet, control panel, drainage, and recommended use.

Quotation and Utility Conditions

What information should be prepared before requesting a steam generator quotation?
Prepare steam room length, width, height, site photos, power conditions, planned generator location, access panel location, cold water supply, drain, steam outlet and control panel positions, and the current renovation stage. More complete information helps initial model and installation evaluation.
Does a steam generator need a dedicated circuit?
Yes. A steam generator must use a dedicated circuit and should not share a circuit with other appliances. Check main panel capacity, voltage, phase, wire size, breaker, leakage protection, and grounding before planning.
Does a steam generator need hot water supply?
Generally no. A steam generator usually uses cold water. The cold water supply is typically reserved near the generator and connected to the inlet with a flexible hose.

Installation Location and Piping

Can the steam generator be installed above the ceiling or inside a cabinet?
Yes. Common locations include above the ceiling, inside a cabinet, or other concealed spaces. The key is stable installation and an access panel near the generator for future access to the water inlet, steam outlet, power wiring, and drain valve.
Does the generator location need special ventilation?
Usually, this is not the main condition. Many generators are installed above the ceiling or inside cabinets, where they are not directly exposed to steam room heat. Stable installation, pipe connection, and maintenance access are more important.
Must the steam pipe be embedded in the wall?
When conditions allow, it is recommended to embed the steam pipe before renovation is completed, mainly for safety and appearance. If the pipe must remain exposed, its route and covering should be planned to reduce the risk of touching a hot pipe.
Must the steam outlet be placed under the seat?
Not necessarily. The outlet position depends on room size, use habits, whether there is a seat, drain position, and safety distance. It is often considered near the opposite side of the main use position, closer to the drain, and around 15 cm above the floor.

Control Panel, Drainage, and Use

Can the control panel be installed directly above the steam outlet?
It is not recommended. The control panel should avoid being directly above the steam outlet to reduce direct steam, moisture, and heat exposure. The position should be easy to operate, less exposed to moisture, and compatible with wiring.
Does the generator drain need to be used regularly?
Usually no. The drain is mainly used during maintenance to release water inside the generator, reduce weight, and make removal or service easier. For daily use, the key is that the steam room drain and floor slope work properly.
How long should each steam room session be?
For daily use, start with around 10–20 minutes and adjust based on personal condition, room temperature, and steam concentration. Longer is not always better. Stop immediately and rest if dizziness, chest tightness, breathing discomfort, or other discomfort occurs.
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Selection Comparison

For users comparing different products, equipment, materials, or solution directions.

Product and Material Differences

How is an Anti-smog Window Screen different from a regular screen?
A regular screen focuses on insect prevention and basic ventilation. An Anti-smog Window Screen also considers dust, pollen, airborne particles, and air quality.
How is a Windproof Vent Cover different from a standard vent cap?
A standard vent cap usually provides basic coverage. A Windproof Vent Cover focuses more on airflow guidance, rain protection, pressure stability, and exhaust stability under strong wind.
How is Basilisk different from general waterproofing materials?
General waterproofing materials often focus on surface blocking. Basilisk focuses more on whether the material can continue repairing when cracks and moisture conditions appear.
How should I choose between a Bathroom Exhaust Fan and a Bathroom Heater Fan?
If moisture exhaust, ventilation, and odor removal are the main needs, an exhaust fan is more focused. If heating, drying, and integrated control are also needed, a heater fan may be more suitable.

Installation Review

For users who already have a direction but still need to check installation conditions and space limits.

Site Conditions and Utilities

Which windows should be evaluated first for Anti-smog Window Screens?
Start with windows that are often opened, near roads, visibly dusty, or in long-stay spaces, such as bedrooms, living rooms, studies, or rooms where dust and pollen matter more.
What should be checked before installing a Windproof Vent Cover?
Check duct diameter, duct direction, exhaust outlet position, exterior wall sealing, waterproof finishing, and future maintenance access.
How should 110V and 220V be selected?
If site conditions allow, 220V is usually a better option, but it should still be evaluated together with correct wire size, a dedicated circuit, and leakage protection.
Does a steam generator need a dedicated circuit?
Yes. A steam generator must use a dedicated circuit and should not share a circuit with other appliances. Check electrical capacity, voltage, phase, wire size, breaker, leakage protection, and grounding before planning.

Use and Maintenance

For users concerned about daily use, cleaning, usage time, and follow-up management.

Daily Care and Use

How should an Anti-smog Window Screen be cleaned?
Clean regularly based on dust conditions, using water or a mild method. Avoid long-term dust buildup that may affect airflow and daily use.
Does ventilation equipment need regular cleaning?
Yes. Cleaning the panel, filter, and air path helps maintain exhaust efficiency, reduce noise, and support stable long-term operation.
How long should each steam room session be?
Start with around 10–20 minutes and adjust based on personal condition, room temperature, and steam concentration. Stop and rest if any discomfort occurs.

Principles and Application Conditions

For users who want to understand the concept before judging by product name.

System Thinking and Product Roles

Which problems cannot be solved by a single product alone?
When a problem involves structure, construction conditions, ventilation paths, electrical configuration, or overall system planning, it should be evaluated as a whole instead of relying on one product only.
Can an Anti-smog Window Screen fully replace an air purifier?
It should not be understood that way. An Anti-smog Window Screen provides front-end protection when windows are opened, while an air purifier handles indoor circulating air. Their roles are different.
Why should long-term waterproofing not focus only on the surface?
Moisture and cracks often occur within the material body or structure. If only a surface coating is used while substrate cracks or water paths remain, the issue may return.
Top Questions

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Product Selection Questions

Will a Windproof Vent Cover affect exhaust efficiency?
A Windproof Vent Cover is not only a cover. Its design should help reduce strong wind interference and lower the risk of airflow returning through the exhaust outlet. With suitable sizing and airflow guidance, it can support more stable exhaust performance in windy environments.
Can an Anti-smog Window Screen improve PM2.5 conditions?
It is not a complete air purifier. Its main role is to help reduce outdoor dust, pollen, and some airborne particles from entering indoors when windows are opened, while keeping basic natural ventilation.
How is an Anti-smog Window Screen different from a regular screen?
A regular screen mainly keeps insects out and provides basic ventilation. An Anti-smog Window Screen also considers dust, pollen, airborne particles, and air quality. The difference is not only mesh density, but also design purpose.

Waterproofing Questions

Is Basilisk the same as crystalline waterproofing?
Not exactly. Traditional crystalline materials mainly form crystals through chemical reactions to fill pores. Basilisk follows a self-healing material concept and focuses on further repair when cracks and moisture conditions appear.
Why should long-term waterproofing not rely only on surface coatings?
Surface coatings can provide protection, but if cracks, water paths, or substrate issues continue, leakage may return. Long-term waterproofing should consider the material body, crack behavior, construction conditions, and maintenance.

Equipment Planning Questions

How should I choose between a Bathroom Exhaust Fan and a Bathroom Heater Fan?
If daily moisture exhaust, ventilation, and odor removal are the main needs, a Bathroom Exhaust Fan is more focused. If winter heating, drying, cool air, and integrated control are also needed, a Bathroom Heater Fan may be more suitable.
What information should be prepared before requesting a steam generator quotation?
Prepare steam room length, width, height, site photos, power conditions, planned generator location, access panel location, cold water supply, drain, steam outlet and control panel positions, and the current renovation stage. More complete information helps initial model and installation evaluation.
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