Industrial Humidification Solutions in HVAC Systems in Vietnam

Context: When "Cooling" is Not Enough

In the Industry 4.0 era, factories in Vietnam are shifting strongly from labor-intensive to high-tech manufacturing. In precision environments such as semiconductor manufacturing, GMP-standard pharmaceuticals, or high-end textiles, temperature control is only a necessary condition. The sufficient condition determining product quality is Humidity Control.

This report provides a comprehensive analysis of the humidification market, compares core technologies (Electrode, Resistive, Ultrasonic), and introduces the DeAir.HM Humidifier solution — a representative of "Made in Vietnam" HVAC equipment meeting international ISO 9001:2015 standards.

1. The "Humidification" Paradox in a Tropical Country

Vietnam is famous for its high humidity (>80%). However, the demand for "humidification" in industry is urgent due to the following thermodynamic principles:

• Sensible Heating Drying: In Northern winters, cold and dry air (e.g., 10°C, 60% RH) is heated to 24°C for factory heating. According to the Psychrometric chart, the relative humidity will drop drastically below 25%, causing dry skin, material cracking, and static electricity buildup.
• Cooling Dehumidification: To achieve deep cooling, AHU/Chiller systems often dehumidify significantly. The air supplied to cleanrooms is often too dry, failing to meet the requirements of sensitive production processes.

2. Multi-Industry Demand Analysis & Technical Standards

Based on international standards like ASHRAE (American Society of Heating, Refrigerating and Air-Conditioning Engineers), each industry has a distinct "golden humidity zone":

Electronics & Semiconductors

The biggest threat is Electrostatic Discharge (ESD). When humidity is < 40%, charges accumulated on insulating surfaces cannot dissipate, leading to discharges that kill ICs and microchips. Therefore, factories like Samsung and Intel always require 24/7 humidification systems.

Textiles & Footwear

Fabrics (Cotton, Wool) are hygroscopic materials. If the air is dry, fibers lose moisture, become brittle, and break easily during high-speed weaving, reducing productivity and increasing airborne dust.

Pharmaceuticals & Medical

Compliance with GMP-WHO standards. Stable humidity helps control chemical reaction rates and prevents pills from drying out during coating. Especially in hospitals, 40-60% humidity helps limit the spread of airborne bacteria and viruses.

3. Infographic: Recommended Humidity Standards by Industry

4. "Dissecting" the 3 Leading Humidification Technologies

DeAir masters and manufactures all three most common humidification technologies, helping customers make objective choices:

4.1. Electrode Steam Technology - The HVAC "Workhorse"

Current flows through water in a cylinder, boiling the water via its internal resistance.
Pros: Low investment cost, sterile steam, easy integration into AHUs.
Note: Requires mineral-rich water (tap/softened) for conductivity. The cylinder must be replaced periodically due to scaling.

4.2. Resistive Steam Technology - The High-Precision Solution

Uses metal-sheathed heating elements to boil water.
Pros: Extremely precise humidity control (±1%). Works with all water sources, including purified water (RO/DI). Durable, heating elements can be cleaned without replacement.

4.3. Ultrasonic Technology - The "Green" Energy Saver

Uses high-frequency ultrasonic waves to atomize water into micron-sized mist.
Pros: Saves up to 90% energy compared to steam humidifiers. Creates "cold mist," helping reduce heat load for factories.
Important Note: Mandatory use of RO/DI water to avoid "white dust" (minerals) settling on equipment.

5. DeAir.HM Ecosystem: The Solution for Localization

Instead of relying on imported brands with high costs and long wait times for parts, DeAir offers a comprehensive localized solution:

• Spare Parts Availability: Overcoming the "pain" of waiting 8-12 weeks for imported goods. DeAir always has cylinders and circuit boards in stock in Hung Yen & HCMC, ready for replacement within 24 hours.
• Smart Drain Pump Technology: Unlike cheap gravity drain valves, DeAir machines are equipped with specialized drain pumps, preventing clogging and extending cylinder life by 2 times.
• Technical Customization: Designing machine dimensions and steam distributors to fit the current duct status of each factory.

6. Infographic: Technology Comparison for Selection

7. Installation & Operation Notes

Installation and maintenance must strictly follow the technical manual accompanying the machine to ensure performance and safety:

• Steam Distributor Position: Must be installed at a location ensuring sufficient absorption distance so that steam mixes completely with the air, preventing condensation that wets ducts or filters.
• Drainage: For electrode/resistive machines, drain water is hot (near 100°C), requiring heat-resistant pipes and proper air trap installation.
• Maintenance: Perform cleaning, replace cylinders (for electrode machines), or clean transducers (for ultrasonic machines) according to DeAir's recommended schedule.

8. Frequently Asked Questions (FAQ)