Why the GH4-DD Green Hair Dryer Is More Than Just a Dryer (Part 1)
The GH4-DD hair dryer from Green, equipped with an NTC sensor, a BLDC motor, and negative ion technology, is a professional-grade option designed for complete hair care. In this article, we’ll examine the technical and functional features that set this model apart.

In today's world, choosing personal care appliances especially hair care tools is no longer just about appearance or price. It’s about a blend of technology, quality, and user safety. With the introduction of the GH4-DD, Green has gone a step further, offering a product that seamlessly combines technical innovation with sleek design and high performance.
According to Green’s official product catalog for hair dryers and straighteners, the GH4-DD features the following specifications, which we’ll explore in two parts:
•    NTC sensor for precise temperature regulation
•    Heat protection to prevent hair damage
•    Enhances shine and maintains hair quality
•    Swivel cord design for extended cable lifespan
•    Automatic low-voltage protection system
•    Airflow blockage protection for added safety
•    Fast airflow and quick drying using a BLDC motor
•    Generates over 600 million negative ions for soft, silky hair without damage

NTC Sensor for Temperature Regulation

The NTC sensor (Negative Temperature Coefficient) is a type of thermistor whose resistance decreases as temperature rises. It’s commonly used in smart appliances including advanced hair dryers like the GH4-DD—for internal temperature monitoring and control.
In the GH4-DD, the NTC sensor constantly measures the temperature of the airflow or the heating element. These readings are sent to the control circuit. If the temperature exceeds safe limits, the device automatically reduces heating intensity or activates cool air. This regulation process occurs dozens of times per second, ensuring stable performance and preventing heat damage to the hair.

Key Benefits of NTC Sensor in Hair Dryers:

•    Precise temperature control
•    Prevents overheating
•    Increases user safety for both hair and skin
•    Reduces energy consumption through intelligent heat management
•    Extends device lifespan

Heat Protection for Hair

Protecting hair from high temperatures is crucial when using thermal tools such as dryers, straighteners, or curling irons. Excessive heat can cause dryness, breakage, split ends, and dullness. The table below provides recommended temperature settings based on hair type:

        
Regardless of hair type, excessive heat over time can harm the hair’s internal structure. When blow-drying, maintain a distance of 15–20 cm between the nozzle and the hair. Prolonged direct contact with heat can cause significant damage.

Enhancing Hair Quality and Shine

Professional dryers like Green’s GH4-DD are designed not just to minimize heat damage, but to actively improve hair health, softness, and natural shine. This is achieved through multiple integrated technologies:

1. Smart Temperature Control with NTC Sensor

As noted, the NTC sensor ensures consistent heat regulation, preventing excessive temperatures that can evaporate natural hair moisture and damage hair texture.

2. Negative Ion Technology

The GH4-DD generates negative ions that neutralize static electricity, seal hair cuticles, and enhance softness and shine. This is especially effective for frizzy or tangle-prone hair.

3. Fast Drying Without Thermal Stress

The powerful, high-speed motor significantly reduces drying time, which lowers heat exposure. Less exposure means less risk of frizz, split ends, and protein damage.

4. Protective & Styling Attachments

The GH4-DD comes with five specialized nozzles including curling, diffuser, and straightening heads. These tools are tailored for different hair types and styling needs. Some attachments feature rotating airflow, which eases styling and reduces tugging and breakage.

5. Moisture Retention

Beyond avoiding overheating, the synergy between heat and ion technologies helps maintain the hair's natural moisture. This is essential for long-lasting softness, flexibility, and shine.

Swivel Cord Design for Enhanced Cable Durability

The rotating cord design is a hallmark of advanced dryers like the GH4-DD. It improves cable flexibility during use, prevents tangling, and reduces wear and tear that leads to fraying.

Benefits of Swivel Cord Design:

•    Free movement during styling
•    Prevents wire twisting and knots
•    Reduces strain on internal wiring
•    Extends cable lifespan
•    Offers easier and safer handling

To further preserve the cable and overall device:

•    Avoid tight winding of the cord
•    Use cord protectors if available
•    Store the device in a dry, cool place
•    Clean air filters and handle the unit with care

Proper maintenance of both the cord and internal components can greatly extend the dryer’s service life. Small habits like gentle coiling, filter cleaning, and correct usage lead to long-term optimal performance.
So far, we’ve explored the standout technical features of the GH4-DD—ranging from smart temperature regulation via NTC sensors to its rotating cord that boosts product durability. But this is just half the story.
In Part Two, we’ll uncover the hidden innovations that most buyers overlook: from advanced voltage protection and airflow blockage detection to the high-performance BLDC motor and powerful negative ion generator that ensures your hair remains healthy, shiny, and smooth.
Looking for a hair dryer that not only dries your hair fast but also protects its health and boosts shine? Don’t miss out on the GH4-DD by Green.
Browse the full product catalog or contact our specialists today.