Mitigating the “Negative Phenomenon” in High-Airtightness Homes. Introducing “Pascal Damper 150,” a Differential Pressure Sensing Natural Air Supply Vent That Resolves Insufficient Air Supply When Using Gas Clothes Dryers and Range Hoods
Nihon Jukankyo Co., Ltd. has launched "Pascal Damper 150," a differential pressure sensing natural air supply vent that mitigates negative pressure phenomena in high-airtightness homes. It automatically adjusts air supply when using equipment like range hoods and gas clothes dryers, maintaining a comfortable indoor environment. This product addresses the issues of insufficient air supply that can compromise comfort and efficiency.
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- 📰 Published: May 13, 2026 at 19:00
- 🔍 Collected: May 13, 2026 at 10:31
- 🤖 AI Analyzed: May 13, 2026 at 11:05 (33 min after Collected)
Nihon Jukankyo Co., Ltd. (Headquarters: Chiyoda-ku, Tokyo; Representative Director: Yasu Haya), a building material manufacturer supporting the long lifespan and comfortable living environments of wooden houses, launched "Pascal Damper 150" on Monday, May 11, 2026. This differential pressure sensing natural air supply vent mitigates negative pressure phenomena that occur in high-airtightness homes when local ventilation or gas clothes dryers are in operation.
Newly Released "Pascal Damper 150"
The increasing performance of homes and the surfacing challenge of "negative pressure"
In recent years, the improvement of energy-saving performance in homes has accelerated towards the realization of a decarbonized society, leading to an increase in "high-airtightness homes" with a C-value (equivalent air leakage area) of 1.0 cm2/m2 or less. However, as airtightness performance increases, a challenge has become apparent: when equipment that exhausts large amounts of air, such as range hoods and gas clothes dryers, is operated, the interior of the house tends to enter an "excessive negative pressure state."
When the interior becomes excessively negative, various bugs (defects) occur that impair the comfort of the home, such as "difficulty opening the front door," "odor intrusion from drain traps," and "decreased efficiency of heat exchange ventilation due to unbalanced air supply and exhaust." "Pascal Damper 150" was developed to alleviate these problems and maximize the inherent performance of high-airtightness homes.
"Further Improvement of Existing Products" to Meet Market Needs
Normally closed, this product gradually opens from around 10Pa
Our company has previously provided products that supply air by sensing the differential pressure between indoor and outdoor, but we have reviewed their performance in response to recent improvements in home performance. With conventional products (opening at 7Pa), there were cases where the damper would open even during normal 24-hour ventilation operation in extremely airtight homes.
Therefore, with "Pascal Damper 150," we have improved the opening pressure to around 10Pa, adapting to the characteristics of modern high-airtightness homes. This suppresses the damper from opening during normal operation. It is a legitimate evolution model of existing products, realizing appropriate operating timing and stable air supply volume in response to the market need for evolving homes.
■ 3 Stories to Complete High-Performance Homes
1. As the "Best Partner" for Gas Clothes Dryers
Gas clothes dryers, which are becoming widespread with the increase in dual-income households, require a large amount of air supply for combustion and drying. Insufficient air supply can lead to "decreased drying efficiency" and "decreased combustion efficiency," becoming an "invisible brake" that lowers the quality of housework. By installing "Pascal Damper 150" in conjunction, it supplements the air required by the dryer, completing housework efficiency and enhancing the comfort of the entire home.
2. The Last Piece to Complete a "Heat Exchange Ventilation" Living Environment
Even in homes that chose heat exchange ventilation for comfortable air and energy saving, if the balance between air supply and exhaust of heat exchange ventilation is disturbed when using a range hood, its performance will not be fully demonstrated. "Pascal Damper 150" automatically adjusts the air supply volume according to the pressure difference, smartly resolving imbalances in air supply and exhaust while minimizing impact on the indoor thermal environment, without wasting the investment in high-airtightness × heat exchange ventilation.
3. Suppressing Excessive Negative Pressure While Third-Class Ventilation Functions Normally
Phenomena such as "the front door becoming heavy" and "toilet odors flowing back into the living room," which are common in high-airtightness homes, often occur. This is a dilemma of high airtightness that residents notice after they start living there. This product detects the differential pressure and activates the air supply switch sooner than residents notice. It mitigates uncomfortable phenomena in the living environment and maintains a space where every family member can live without stress.
Main Features of the Product
1. No Power Required, Automatic Air Volume Adjustment by Pressure Difference
The opening area of the damper automatically changes according to the pressure difference between indoor and outdoor. Designed to start opening around 10Pa, half-open at 18Pa, and fully open at 30Pa, it smartly adjusts indoor air pressure balance without using electricity.
2. Excellent Weather Resistance and Maintainability
Uses ASA resin for excellent weather resistance
Because it is a component used for a long time, we adopted "ASA resin" to suppress discoloration. This prevents fading over time and maintains the aesthetic appeal of the indoor space. In addition, the standard pollen filter is designed to conceal screw holes, achieving both functionality and ease of cleaning.
3. Design Unity and Functional Differentiation with "Square Flow 150"
Design unified with our existing products Square Flow 150 (left) and Square Flow (right)
Its design is unified with our existing products "Square Flow" and "Square Flow 150." This allows for a consistent design of air supply vents throughout the indoor space. Furthermore, we propose flexible functional differentiation according to the home's ventilation design: the constantly open "Square Flow 150" for areas requiring large airflow, and "Pascal Damper 150" for areas requiring automatic control by differential pressure.
Product Overview
Product Name
Pascal Damper 150
Product Number
I-PADP150
Material
Newly Released "Pascal Damper 150"
The increasing performance of homes and the surfacing challenge of "negative pressure"
In recent years, the improvement of energy-saving performance in homes has accelerated towards the realization of a decarbonized society, leading to an increase in "high-airtightness homes" with a C-value (equivalent air leakage area) of 1.0 cm2/m2 or less. However, as airtightness performance increases, a challenge has become apparent: when equipment that exhausts large amounts of air, such as range hoods and gas clothes dryers, is operated, the interior of the house tends to enter an "excessive negative pressure state."
When the interior becomes excessively negative, various bugs (defects) occur that impair the comfort of the home, such as "difficulty opening the front door," "odor intrusion from drain traps," and "decreased efficiency of heat exchange ventilation due to unbalanced air supply and exhaust." "Pascal Damper 150" was developed to alleviate these problems and maximize the inherent performance of high-airtightness homes.
"Further Improvement of Existing Products" to Meet Market Needs
Normally closed, this product gradually opens from around 10Pa
Our company has previously provided products that supply air by sensing the differential pressure between indoor and outdoor, but we have reviewed their performance in response to recent improvements in home performance. With conventional products (opening at 7Pa), there were cases where the damper would open even during normal 24-hour ventilation operation in extremely airtight homes.
Therefore, with "Pascal Damper 150," we have improved the opening pressure to around 10Pa, adapting to the characteristics of modern high-airtightness homes. This suppresses the damper from opening during normal operation. It is a legitimate evolution model of existing products, realizing appropriate operating timing and stable air supply volume in response to the market need for evolving homes.
■ 3 Stories to Complete High-Performance Homes
1. As the "Best Partner" for Gas Clothes Dryers
Gas clothes dryers, which are becoming widespread with the increase in dual-income households, require a large amount of air supply for combustion and drying. Insufficient air supply can lead to "decreased drying efficiency" and "decreased combustion efficiency," becoming an "invisible brake" that lowers the quality of housework. By installing "Pascal Damper 150" in conjunction, it supplements the air required by the dryer, completing housework efficiency and enhancing the comfort of the entire home.
2. The Last Piece to Complete a "Heat Exchange Ventilation" Living Environment
Even in homes that chose heat exchange ventilation for comfortable air and energy saving, if the balance between air supply and exhaust of heat exchange ventilation is disturbed when using a range hood, its performance will not be fully demonstrated. "Pascal Damper 150" automatically adjusts the air supply volume according to the pressure difference, smartly resolving imbalances in air supply and exhaust while minimizing impact on the indoor thermal environment, without wasting the investment in high-airtightness × heat exchange ventilation.
3. Suppressing Excessive Negative Pressure While Third-Class Ventilation Functions Normally
Phenomena such as "the front door becoming heavy" and "toilet odors flowing back into the living room," which are common in high-airtightness homes, often occur. This is a dilemma of high airtightness that residents notice after they start living there. This product detects the differential pressure and activates the air supply switch sooner than residents notice. It mitigates uncomfortable phenomena in the living environment and maintains a space where every family member can live without stress.
Main Features of the Product
1. No Power Required, Automatic Air Volume Adjustment by Pressure Difference
The opening area of the damper automatically changes according to the pressure difference between indoor and outdoor. Designed to start opening around 10Pa, half-open at 18Pa, and fully open at 30Pa, it smartly adjusts indoor air pressure balance without using electricity.
2. Excellent Weather Resistance and Maintainability
Uses ASA resin for excellent weather resistance
Because it is a component used for a long time, we adopted "ASA resin" to suppress discoloration. This prevents fading over time and maintains the aesthetic appeal of the indoor space. In addition, the standard pollen filter is designed to conceal screw holes, achieving both functionality and ease of cleaning.
3. Design Unity and Functional Differentiation with "Square Flow 150"
Design unified with our existing products Square Flow 150 (left) and Square Flow (right)
Its design is unified with our existing products "Square Flow" and "Square Flow 150." This allows for a consistent design of air supply vents throughout the indoor space. Furthermore, we propose flexible functional differentiation according to the home's ventilation design: the constantly open "Square Flow 150" for areas requiring large airflow, and "Pascal Damper 150" for areas requiring automatic control by differential pressure.
Product Overview
Product Name
Pascal Damper 150
Product Number
I-PADP150
Material