Commercial Air Curtains Sales

Commercial Air Curtains Sales Market Outlook

The global air curtains market is projected to reach approximately USD 2.5 billion by 2035, growing at a compound annual growth rate (CAGR) of around 7.2% during the forecast period of 2025 to 2035. The rapid expansion of commercial and industrial sectors, coupled with increasing energy efficiency regulations, serves as a key driver for the market's growth. The heightened awareness of the benefits of air curtains in maintaining indoor air quality and temperature is also contributing to market dynamics. Furthermore, advancements in technology, such as smart air curtain systems that offer enhanced control and efficiency, are expected to stimulate market demand. The ongoing trend of green building initiatives is anticipated to further boost the adoption of air curtains across various applications and end-user segments.

Growth Factor of the Market

The growth of the air curtains market can be attributed to several interlinked factors. Firstly, the increasing focus on energy conservation and the need for efficient climate control solutions in commercial spaces are pivotal. As businesses strive to reduce energy costs while maintaining a comfortable environment, air curtains provide an effective solution. Additionally, the rise in the food service industry, necessitating stringent hygiene and temperature control measures, adds to the demand. The industrial sector is also witnessing a shift towards automation and improved operational efficiency, with air curtains serving a crucial role in minimizing the ingress of contaminants. Furthermore, the evolution of building codes and standards aimed at enhancing indoor air quality is compelling organizations to adopt air curtain systems. Lastly, the growing trend of e-commerce and retail expansions creates new opportunities for air curtain installations in storefronts and warehouses.

Key Highlights of the Market

• The global air curtains market is projected to reach USD 2.5 billion by 2035.
• Expected CAGR of 7.2% from 2025 to 2035, showcasing robust growth potential.
• Increasing adoption in commercial buildings and industrial facilities enhances market scope.
• Technological advancements lead to the innovation of smart air curtain systems.
• The rise of green building initiatives drives demand for energy-efficient solutions.

By Product Type

Recessed:

Recessed air curtains are designed to be installed within the wall or ceiling, offering a seamless appearance and making them an aesthetic choice for commercial spaces. This product type is particularly popular in establishments aiming to maintain an unobtrusive look while efficiently controlling air flow. The installation of recessed air curtains can facilitate a more integrated design, allowing for improved airflow without the distraction of visible hardware. Their ability to blend into the architecture makes them ideal for retail environments, offices, and high-end establishments that prioritize aesthetics alongside functionality. As the trend toward minimalistic designs grows, the demand for recessed air curtains is expected to rise significantly.

Non-Recessed:

Non-recessed air curtains are mounted on the surface of walls or ceilings, making them easier to install and maintain compared to their recessed counterparts. This type of air curtain is widely used in high-traffic areas such as retail stores, warehouses, and industrial facilities. The ease of installation and flexibility in placement allows them to be implemented in various configurations, catering to the specific needs of different environments. Non-recessed air curtains come in various sizes and designs, providing options for customization according to the specific application. Their robust performance in effectively creating a barrier against contaminants and air exchange contributes to their popularity across diverse industries.

Industrial:

Industrial air curtains are specifically designed to withstand demanding environments, providing high-performance solutions for factories, manufacturing plants, and warehouses. These air curtains often feature heavy-duty construction and powerful airflows, ensuring they effectively separate indoor and outdoor environments, thus enhancing energy efficiency and maintaining temperature control. The features of industrial air curtains typically include adjustable airflow settings and durability to perform under harsh conditions. As industries continue to focus on optimizing operational efficiency and minimizing energy costs, the demand for industrial air curtains is poised for growth, particularly in sectors such as manufacturing and logistics.

Commercial:

Commercial air curtains are utilized in a variety of business settings, including retail stores, hotels, and restaurants. They serve to maintain a comfortable indoor climate while allowing easy access for customers and employees. The deployment of commercial air curtains is crucial in environments where doors are frequently opened, as they help maintain temperature and prevent the infiltration of dust, insects, and other contaminants. Additionally, commercial air curtains can enhance the overall customer experience by providing a more comfortable atmosphere, making them a preferred choice among business owners. As the retail and hospitality sectors continue to expand, the demand for commercial air curtains is expected to grow.

Residential:

Residential air curtains are gaining traction as homeowners become more aware of their benefits in maintaining indoor comfort and improving energy efficiency. These air curtains are typically used at entry points such as front doors or garage door openings, creating a barrier that helps control the interior climate while allowing easy access. The rise in interest towards sustainable living and energy-saving solutions is driving residential customers to consider air curtains as a viable option. Features such as noise reduction and aesthetic designs suitable for home environments further enhance their appeal. As more homeowners prioritize energy efficiency, the residential segment of the air curtains market is anticipated to witness steady growth.

By Application

Commercial Buildings:

Commercial buildings represent a significant application area for air curtains, aimed at enhancing energy efficiency and indoor air quality. These systems are essential in environments with high foot traffic, such as shopping malls, hotels, and office buildings, where it is crucial to prevent air loss and maintain temperature stability. By creating an invisible barrier, air curtains help reduce HVAC loads, ultimately leading to lower energy costs. Moreover, they contribute to the comfort of employees and customers by minimizing drafts and external pollutants. With the ongoing trend of energy-conscious commercial construction, the demand for air curtains in commercial buildings continues to rise.

Industrial Facilities:

The use of air curtains in industrial facilities is increasingly recognized for its role in maintaining operational efficiency and safety. These environments often involve the movement of goods and personnel, which can lead to significant air exchange and contamination issues. Industrial air curtains serve to mitigate these challenges by providing a robust barrier against dust, debris, and pests, contributing to a cleaner working environment. Additionally, they help regulate temperature and airflow, which can be critical in temperature-sensitive operations. As industries focus on optimizing performance and maintaining compliance with health and safety regulations, the application of air curtains in industrial settings is expected to expand.

Cold Storage:

Cold storage facilities rely heavily on maintaining specific temperature ranges to ensure the integrity of perishable goods. Air curtains play a vital role in these environments by providing an efficient means to reduce air exchange without compromising accessibility. By minimizing the entry of warm air when doors are opened, air curtains help maintain the desired temperature, ultimately reducing energy consumption and costs associated with refrigeration. This application is particularly relevant as the food and pharmaceuticals industries increasingly adopt stringent standards for temperature control. The growing demand for safe and efficient cold storage solutions is driving the adoption of air curtains in this sector.

Food Service Facilities:

Air curtains are an essential component of food service facilities, where hygiene and temperature control are paramount. By creating a barrier against airborne contaminants, these systems help maintain the cleanliness of food preparation and service areas. They also contribute to a stable indoor climate, thereby enhancing customer comfort. In restaurants, cafeterias, and catering services, air curtains facilitate seamless operations by allowing easy entry and exit while minimizing the impact on indoor conditions. With the continuous evolution of food safety regulations, the importance of air curtains in food service facilities is becoming increasingly recognized, leading to a rise in their application.

Others:

The 'Others' category encompasses various niche applications where air curtains contribute to energy savings and environmental control. This includes settings like garages, workshops, and educational institutions. In these environments, air curtains serve multiple purposes, including temperature regulation, dust control, and pest prevention. As awareness of the benefits of air curtains spreads, the variety of applications continues to grow. Organizations across different sectors are beginning to realize that air curtains are not merely a convenience but a critical part of an energy-efficient and comfortable indoor environment.

By Mounting Height

Low Mounting Height:

Low mounting height air curtains are primarily designed for installations where the ceiling height is limited, typically used in smaller commercial settings. These air curtains provide an effective barrier against air exchange while ensuring that they do not obstruct visibility or access. Their compact design allows for easy integration into existing structures where space is a concern. The growing trend of adaptive reuse of buildings, where older structures are repurposed for new uses, is driving demand for low mounting height solutions. As businesses increasingly seek to optimize their spaces, these air curtains are becoming a popular choice in tight environments.

Medium Mounting Height:

Medium mounting height air curtains are versatile solutions suitable for a range of applications, bridging the gap between low and high mounting options. They are typically used in environments with average ceiling heights, such as retail stores and shopping centers. These air curtains effectively create a barrier against external elements while allowing for a comfortable customer experience. Their adaptability in various settings makes them a preferred choice among business owners looking for efficient climate control solutions. As retail spaces evolve to meet changing consumer needs, the demand for medium mounting height air curtains is expected to grow.

High Mounting Height:

High mounting height air curtains are designed for larger spaces, such as warehouses, factories, and big-box retail stores. These systems are engineered to deliver powerful airflow that can effectively cover larger door openings, maintaining temperature and air quality. High mounting air curtains are crucial in environments where doors are frequently opened, as they significantly minimize energy losses and prevent the intrusion of contaminants. The increasing emphasis on energy efficiency in larger commercial operations is boosting the adoption of high mounting height air curtains, making them a key component in sustainable building strategies.

Extra High Mounting Height:

Extra high mounting height air curtains are specifically tailored for exceptionally tall openings, such as those found in distribution centers and industrial facilities. These air curtains are capable of providing robust airflow across significant heights, ensuring effective separation between indoor and outdoor environments. Their powerful performance is essential in preventing air exchange and maintaining temperature, particularly in operations where environmental control is critical. As industries continue to optimize their supply chains and enhance operational efficiency, the demand for extra high mounting height air curtains is likely to increase, catering to the unique needs of large-scale facilities.

By End User

Retail:

The retail sector is one of the largest end-users of air curtains, where they play a vital role in enhancing customer experience and operational efficiency. By providing a comfortable indoor climate while allowing easy access for shoppers, air curtains contribute to energy savings and minimize the effects of external weather conditions. Retailers increasingly recognize the value of energy-efficient solutions, and air curtains help reduce heating and cooling costs by maintaining stable indoor temperatures. With the continuous growth of the retail sector, especially in e-commerce and brick-and-mortar stores, the demand for air curtains is expected to remain robust.

Food Service:

In the food service industry, air curtains are indispensable in preserving hygiene and maintaining optimal temperature conditions. Restaurants, cafeterias, and catering services benefit from the use of air curtains to separate dining areas from external elements while ensuring easy movement in and out of the premises. The ability of air curtains to enhance the overall dining experience by preventing drafts and contaminants is driving their adoption in food service establishments. As consumer awareness of food safety grows, the need for effective solutions like air curtains is more critical than ever, fueling demand within this end-user segment.

Healthcare:

The healthcare sector utilizes air curtains to maintain sterile environments in hospitals and clinics. These systems help prevent the ingress of dust, particles, and bacteria, which is essential in settings where patient safety is a priority. By creating a controlled environment, air curtains contribute to compliance with health regulations and standards. Their deployment in emergency departments, operating rooms, and pharmacy areas is becoming increasingly common, as they provide an effective solution for minimizing contamination risks. The focus on improving healthcare facilities and ensuring patient safety provides a significant opportunity for air curtain manufacturers within this end-user segment.

Industrial:

Industrial facilities prioritize operational efficiency and environmental control, making air curtains essential in these settings. Their ability to minimize contaminants from entering production areas ensures compliance with strict health and safety standards. Air curtains in industrial environments also help maintain temperature control, contributing to energy savings and cost reduction. With industries continuously striving to optimize performance, the demand for air curtains in manufacturing plants, warehouses, and distribution centers is expected to increase. The recognition of air curtains as a critical component of environmental management systems further solidifies their position in the industrial sector.

Others:

The 'Others' category encompasses various end-users, including educational institutions, government buildings, and private offices. In these environments, air curtains serve multiple functions, such as providing comfort and maintaining air quality. The increasing focus on energy efficiency and sustainable practices across all sectors is driving the adoption of air curtains in diverse applications. As organizations recognize the benefits of maintaining a controlled indoor environment, the demand for air curtains across various end-user segments will continue to grow, contributing to the overall market expansion.

By Region

The North American air curtains market is expected to dominate the global landscape, accounting for approximately 35% of total market share by 2035. The region's emphasis on energy-efficient solutions and stringent building regulations contribute to the growing adoption of air curtains across commercial and industrial applications. The United States, in particular, is experiencing robust growth driven by the retail and food service sectors, as businesses increasingly seek to enhance customer experiences while reducing energy costs. The region is projected to register a CAGR of around 7.5% over the forecast period, reflecting the ongoing shift towards sustainable building practices and energy conservation.

Europe follows closely, comprising around 30% of the global air curtains market share. The European market is characterized by a strong focus on environmental regulations and energy efficiency measures. Countries like Germany, France, and the United Kingdom are at the forefront of adopting air curtains in various applications, including commercial buildings and healthcare facilities. The presence of leading manufacturers and innovative technology further accelerates market growth in this region. As the trend of green building initiatives continues to gain momentum, the European market is expected to exhibit a steady CAGR of 6.8% from 2025 to 2035, driven by the increasing demand for effective climate control solutions.

Opportunities

The air curtains market is poised for significant opportunities, particularly in the wake of increasing urbanization and the expansion of commercial infrastructure. As cities grow, the demand for efficient energy solutions in buildings intensifies, leading to a greater need for air curtain systems. New construction projects often prioritize sustainability, creating avenues for manufacturers to integrate advanced air curtain technologies that enhance energy efficiency and indoor air quality. Furthermore, ongoing advancements in smart technologies, including IoT-enabled air curtains, present unique opportunities for market growth. These systems offer enhanced control and adaptability, aligning with the modern trend of smart building management. As energy regulations become stricter worldwide, the incorporation of air curtains in both new and existing structures will likely become a focal point for architects, builders, and facility managers.

Additionally, the growing awareness of indoor air quality and its impact on health is driving opportunities for the air curtains market. With increasing concerns about airborne contaminants, businesses and organizations are investing in solutions that promote cleaner and healthier environments. Air curtains contribute significantly to these initiatives by preventing the ingress of pollutants and maintaining stable indoor climates. The expansion of the food service and healthcare sectors, which prioritize hygiene and safety, further amplifies the demand for air curtains as essential components of modern building design. As businesses adapt to changing consumer expectations and regulatory pressures, the air curtains market is well-positioned to benefit from these evolving opportunities.

Threats

Despite the promising outlook for the air curtains market, several threats could impede growth. The primary concern is the presence of alternative solutions that may compete with air curtains in terms of efficiency and cost-effectiveness. For instance, advancements in door technology, such as automatic doors or sensor-based systems, may provide similar benefits in controlling indoor climates and preventing contaminants. As businesses continue to explore various options for enhancing energy efficiency, the competitive landscape may shift, posing challenges for air curtain manufacturers. Additionally, economic fluctuations and uncertainties can influence capital investments in building infrastructure, potentially leading to delays or reductions in air curtain installations.

Another significant threat is the potential for supply chain disruptions that could affect the availability of components used in manufacturing air curtains. Global events, such as trade tensions or natural disasters, may hinder the production and distribution of essential materials, resulting in increased costs or delays in product launches. As the market for air curtains continues to expand, ensuring a stable supply chain will be crucial for manufacturers to meet growing demand. Furthermore, a lack of awareness and understanding of the benefits of air curtains among end-users may hinder market penetration in certain regions. Educational initiatives and effective marketing strategies will be vital in overcoming these challenges and promoting the advantages of air curtains in diverse applications.

Competitor Outlook

• Soft dB
• Berner International
• TPI Corporation
• Mars Air Systems
• Airtecnics
• Jingjiang Huajing
• Systemair AB
• Wingspan
• Panasonic Corporation
• HVC Air Curtains
• Alaska Air Curtain
• Gree Electric Appliances
• HVI
• Saima Air Curtains
• Air Curtain Co.

The competitive landscape of the air curtains market is characterized by the presence of several established players and numerous new entrants looking to capitalize on the growing demand for energy-efficient climate control solutions. Leading companies are focusing on product innovation and technological advancements to enhance their offerings and differentiate themselves in the market. The rapid pace of technological change is compelling manufacturers to invest in research and development to introduce smarter, more efficient air curtain systems that cater to diverse applications. Additionally, the increasing emphasis on sustainability and energy efficiency is driving companies to develop air curtains that meet stringent green building standards, further expanding their market appeal.

Key players in the air curtains market are actively seeking strategic partnerships and collaborations to strengthen their market position. By aligning with other industry stakeholders, such as HVAC system manufacturers and building contractors, they can expand their distribution channels and enhance product visibility. Furthermore, many companies are adopting aggressive marketing strategies to raise awareness of the benefits of air curtains among end-users, emphasizing their role in improving indoor air quality and energy savings. These collaborative efforts, coupled with focused marketing campaigns, are expected to bolster the growth of the air curtains market and enhance competitive advantage for leading players.

Among the major companies, Berner International stands out as a leading manufacturer, known for its wide range of air curtain solutions catering to various industries. With a strong emphasis on innovation and customer satisfaction, Berner International has established itself as a trusted brand in the air curtains market. Mars Air Systems is another prominent player, recognized for its energy-efficient air curtain systems designed for commercial and industrial applications. Their commitment to sustainability and quality has helped them gain a competitive edge in the market. Furthermore, companies like Panasonic and Gree Electric Appliances are leveraging their extensive experience in the HVAC industry to develop advanced air curtain technologies that meet the evolving needs of consumers and businesses alike.

• 1 Appendix

  • 1.1 List of Tables
  • 1.2 List of Figures

• 2 Introduction

  • 2.1 Market Definition
  • 2.2 Scope of the Report
  • 2.3 Study Assumptions
  • 2.4 Base Currency & Forecast Periods

• 3 Market Dynamics

  • 3.1 Market Growth Factors
  • 3.2 Economic & Global Events
  • 3.3 Innovation Trends
  • 3.4 Supply Chain Analysis

• 4 Consumer Behavior

  • 4.1 Market Trends
  • 4.2 Pricing Analysis
  • 4.3 Buyer Insights

• 5 Key Player Profiles

  • 5.1 HVI
    • 5.1.1 Business Overview
    • 5.1.2 Products & Services
    • 5.1.3 Financials
    • 5.1.4 Recent Developments
    • 5.1.5 SWOT Analysis
  • 5.2 Soft dB
    • 5.2.1 Business Overview
    • 5.2.2 Products & Services
    • 5.2.3 Financials
    • 5.2.4 Recent Developments
    • 5.2.5 SWOT Analysis
  • 5.3 Wingspan
    • 5.3.1 Business Overview
    • 5.3.2 Products & Services
    • 5.3.3 Financials
    • 5.3.4 Recent Developments
    • 5.3.5 SWOT Analysis
  • 5.4 Airtecnics
    • 5.4.1 Business Overview
    • 5.4.2 Products & Services
    • 5.4.3 Financials
    • 5.4.4 Recent Developments
    • 5.4.5 SWOT Analysis
  • 5.5 Systemair AB
    • 5.5.1 Business Overview
    • 5.5.2 Products & Services
    • 5.5.3 Financials
    • 5.5.4 Recent Developments
    • 5.5.5 SWOT Analysis
  • 5.6 Air Curtain Co.
    • 5.6.1 Business Overview
    • 5.6.2 Products & Services
    • 5.6.3 Financials
    • 5.6.4 Recent Developments
    • 5.6.5 SWOT Analysis
  • 5.7 TPI Corporation
    • 5.7.1 Business Overview
    • 5.7.2 Products & Services
    • 5.7.3 Financials
    • 5.7.4 Recent Developments
    • 5.7.5 SWOT Analysis
  • 5.8 HVC Air Curtains
    • 5.8.1 Business Overview
    • 5.8.2 Products & Services
    • 5.8.3 Financials
    • 5.8.4 Recent Developments
    • 5.8.5 SWOT Analysis
  • 5.9 Mars Air Systems
    • 5.9.1 Business Overview
    • 5.9.2 Products & Services
    • 5.9.3 Financials
    • 5.9.4 Recent Developments
    • 5.9.5 SWOT Analysis
  • 5.10 Jingjiang Huajing
    • 5.10.1 Business Overview
    • 5.10.2 Products & Services
    • 5.10.3 Financials
    • 5.10.4 Recent Developments
    • 5.10.5 SWOT Analysis
  • 5.11 Alaska Air Curtain
    • 5.11.1 Business Overview
    • 5.11.2 Products & Services
    • 5.11.3 Financials
    • 5.11.4 Recent Developments
    • 5.11.5 SWOT Analysis
  • 5.12 Saima Air Curtains
    • 5.12.1 Business Overview
    • 5.12.2 Products & Services
    • 5.12.3 Financials
    • 5.12.4 Recent Developments
    • 5.12.5 SWOT Analysis
  • 5.13 Berner International
    • 5.13.1 Business Overview
    • 5.13.2 Products & Services
    • 5.13.3 Financials
    • 5.13.4 Recent Developments
    • 5.13.5 SWOT Analysis
  • 5.14 Panasonic Corporation
    • 5.14.1 Business Overview
    • 5.14.2 Products & Services
    • 5.14.3 Financials
    • 5.14.4 Recent Developments
    • 5.14.5 SWOT Analysis
  • 5.15 Gree Electric Appliances
    • 5.15.1 Business Overview
    • 5.15.2 Products & Services
    • 5.15.3 Financials
    • 5.15.4 Recent Developments
    • 5.15.5 SWOT Analysis

• 6 Market Segmentation

  • 6.1 Commercial Air Curtains Sales Market, By End User
    • 6.1.1 Retail
    • 6.1.2 Food Service
    • 6.1.3 Healthcare
    • 6.1.4 Industrial
    • 6.1.5 Others
  • 6.2 Commercial Air Curtains Sales Market, By Application
    • 6.2.1 Commercial Buildings
    • 6.2.2 Industrial Facilities
    • 6.2.3 Cold Storage
    • 6.2.4 Food Service Facilities
    • 6.2.5 Others
  • 6.3 Commercial Air Curtains Sales Market, By Product Type
    • 6.3.1 Recessed
    • 6.3.2 Non-Recessed
    • 6.3.3 Industrial
    • 6.3.4 Commercial
    • 6.3.5 Residential
  • 6.4 Commercial Air Curtains Sales Market, By Mounting Height
    • 6.4.1 Low Mounting Height
    • 6.4.2 Medium Mounting Height
    • 6.4.3 High Mounting Height
    • 6.4.4 Extra High Mounting Height

• 7 Competitive Analysis

  • 7.1 Key Player Comparison
  • 7.2 Market Share Analysis
  • 7.3 Investment Trends
  • 7.4 SWOT Analysis

• 8 Research Methodology

  • 8.1 Analysis Design
  • 8.2 Research Phases
  • 8.3 Study Timeline

• 9 Future Market Outlook

  • 9.1 Growth Forecast
  • 9.2 Market Evolution

• 10 Geographical Overview

  • 10.1 Europe - Market Analysis
    • 10.1.1 By Country
      • 10.1.1.1 UK
      • 10.1.1.2 France
      • 10.1.1.3 Germany
      • 10.1.1.4 Spain
      • 10.1.1.5 Italy
  • 10.2 Asia Pacific - Market Analysis
    • 10.2.1 By Country
      • 10.2.1.1 India
      • 10.2.1.2 China
      • 10.2.1.3 Japan
      • 10.2.1.4 South Korea
  • 10.3 Latin America - Market Analysis
    • 10.3.1 By Country
      • 10.3.1.1 Brazil
      • 10.3.1.2 Argentina
      • 10.3.1.3 Mexico
  • 10.4 North America - Market Analysis
    • 10.4.1 By Country
      • 10.4.1.1 USA
      • 10.4.1.2 Canada
  • 10.5 Middle East & Africa - Market Analysis
    • 10.5.1 By Country
      • 10.5.1.1 Middle East
      • 10.5.1.2 Africa
  • 10.6 Commercial Air Curtains Sales Market by Region

• 11 Global Economic Factors

  • 11.1 Inflation Impact
  • 11.2 Trade Policies

• 12 Technology & Innovation

  • 12.1 Emerging Technologies
  • 12.2 AI & Digital Trends
  • 12.3 Patent Research

• 13 Investment & Market Growth

  • 13.1 Funding Trends
  • 13.2 Future Market Projections

• 14 Market Overview & Key Insights

  • 14.1 Executive Summary
  • 14.2 Key Trends
  • 14.3 Market Challenges
  • 14.4 Regulatory Landscape

Segments Analyzed in the Report

The global Commercial Air Curtains Sales market is categorized based on

By Product Type

• Recessed
• Non-Recessed
• Industrial
• Commercial
• Residential

By Application

• Commercial Buildings
• Industrial Facilities
• Cold Storage
• Food Service Facilities
• Others

By Mounting Height

• Low Mounting Height
• Medium Mounting Height
• High Mounting Height
• Extra High Mounting Height

By End User

• Retail
• Food Service
• Healthcare
• Industrial
• Others

By Region

• North America
• Europe
• Asia Pacific
• Latin America
• Middle East & Africa

Key Players

• Soft dB
• Berner International
• TPI Corporation
• Mars Air Systems
• Airtecnics
• Jingjiang Huajing
• Systemair AB
• Wingspan
• Panasonic Corporation
• HVC Air Curtains
• Alaska Air Curtain
• Gree Electric Appliances
• HVI
• Saima Air Curtains
• Air Curtain Co.