Gain systematic knowledge of heavy‑duty door closers. Learn the origin, industry certification evolution and widespread application of door closers. Follow practical t...
Oct 08, 2026
Choosing a reliable door closer starts with understanding its internal structure. Check our full explanation of 6 critical door closer components. Learn how each part impacts ...
Sep 29, 2026
We review top‑rated USA commercial door closer manufacturers, covering ANSI Grade 1, UL‑listed, ADA‑compliant hardware for renovation and new construction projects.
Sep 19, 2026
Learn how to adjust sweep speed, latch speed, back check and hold-open on commercial and fire-rated door closers, with safety and troubleshooting tips.
Sep 11, 2026
China has become one of the world’s major production bases for door control hardware. Dorrenhuas and other reliable Chinese factories provide EN1154, CE and UL certified door cl...
Sep 09, 2026
There are several reasons why door closers are designed to enable slow door closures: Safety : Slow door closures reduce the risk of doors slamming shut, preventing injuries and...
Oct 17, 2023
Have you ever wondered why a door closes slowly, almost as if it has a mind of its own? The answer lies in a clever mechanism called a door closer. Door closers are common fixtu...
The Dorrenhaus Medium Duty Concealed Door Closer (Model D30), a sophisticated and discreet overhead hydraulic door closer designed for internal doors. With its skillful craftsma...
Jul 28, 2023
The Slide Channel Door Closer (Model D904H) from Dorrenhaus, a top-of-the-line hydraulic door closer designed specifically for light-duty and residential applications. This exce...
Sliding door closers can be used in outdoor environments, including on patio doors. However, when installing a sliding door closer in an outdoor setting, there are some addition...
Jul 14, 2023
Installing a sliding door closer generally does not require any specialized tools or advanced skills. With some basic tools and a moderate level of DIY proficiency, most individ...
Adjusting a sliding door closer is an important task to ensure proper functionality and desired performance. Here are some general steps to guide you in adjusting a sliding door...
Jun 29, 2023