Certifications & Test Reports
Over 50 USA & EU fenestration certifications and test reports.

Germans have long been known for their meticulous engineering and innovative designs. When it comes to home ventilation, they have introduced a concept that is revolutionizing the industry-the German's Opening Windows. In this blog post, we will explore the benefits and features of these advanced windows and how they enhance natural ventilation in homes.
Natural ventilation plays a crucial role in maintaining a healthy and comfortable living environment. It helps in improving indoor air quality, regulating temperature, and reducing the reliance on mechanical cooling and heating systems. Traditional windows provide limited control over ventilation, often leading to ineffective airflow and poor energy efficiency. This is where German's Opening Windows come into the picture.
German's Opening Windows are designed with several unique features that set them apart from regular windows. These features include:
By incorporating German's Opening Windows into homes, homeowners can experience an array of benefits, such as:
Installing German's Opening Windows requires professional expertise due to the intricacies involved. It is important to consult with reputable window manufacturers or trained technicians to ensure accurate installation. Regular maintenance, such as cleaning and greasing the moving parts, will prolong the lifespan of the windows and ensure their optimal functionality.
German's Opening Windows offer an innovative solution to enhance natural ventilation and create a healthier living environment. With their advanced features and numerous benefits, these windows are becoming increasingly popular among homeowners. By embracing German engineering and incorporating these windows into homes, we can strive for better indoor air quality, energy efficiency, and overall comfort.
germans opening windowsWith Doorwin, you can have all of this with a simple move. This is because we believe that the best way to achieve your goals is by working with
our customers to find solutions to their problems.Our team of designers and engineers are dedicated to solving these problems by creating
products that are designed to be easy to install, easy to maintain and repair, while being cost-effective.
Over 50 USA & EU fenestration certifications and test reports.
TPS glazing ensures that no air leakage and fogging issues for 25 years warranty.
More than 4000 high-end bespoke fenestration projects in North America.
Doorwin products meanwhile with half price compared with your local dealers.
Our team of experts will work with you to develop a bespoke plan that fits your needs. We take a holistic approach to the planning process, combining our technical expertise with our knowledge of customer requirements and project constraints.
Doorwin is the manufacturer of full custom fenestration systems, and we're here for you. We provide you with the freedom to design your windows, doors, and more with no additional charge for special shapes, hardware styles, and color choices. Your vision is our inspiration; our job is to make it a reality.
Our products are made to pass your local inspector's verification and are built under USA building codes so you can rest assured that they are safe and sturdy. Choose Doorwin to experience the best bespoke fenestration service available today!
We take care of the entire process for you, from beginning to end. We have our own expertise and will provide free-charge design development & contract documentation with CAD and BIM drawings. In addition to elevation details and installation design, we will double-check that the products match the drawings and project specifications through video or pictures. We'll help you specify the delivery schedule and logistics service whilst keeping costs to a minimum.
We're proud to be one of the top exporters of windows and doors to the United States. We pack each window individually and in four layers, and finally into wooden boxes with non-fumigation, and at the same time, there will be a lot of shockproof measures in the container to protect your items. We ensure that your products will arrive at the sites in good condition after long-distance transportation.
Doorwin has been exporting tens of millions of dollars of windows and doors to the U.S. every year, and we know that improper packaging can cause breakage of the product when it arrives on site. What the client concerns, we concern most.
Doorwin experts are experienced in working with architects, builders and homeowners to ensre your vision becomes a reality.Welcome to visit a showroom, ask questions about product pricing, request a quote and more.
We are tested by the following standards:
-NFRC (North American Fenestration Rating Council)
-AAMA (American Architectural Manufacturers Association)
-WNMA (Wood National Monument Association)
-CSA101 (Canadian Standards Association)
-I.S.2 (International Standard ISO/IEC 17025)
-A440-11 (Standard for Fire Testing of Door Assemblies for Charging Rooms)
Doorwin is a company that specializes in custom-made doors and windows. We understand that every home is unique, and we are committed to providing you with the highest quality products possible.Our products are inspired by different lifestyles, and we respect your vision when designing them. Our designs are made specifically for you, so there is no additional cost. We work across styles and profiles, whether you're remodeling an old house or designing your new dream home. Find inspirations here and we will fulfill all your imaginations.