Buyers must ensure products meet regional safety and quality codes. Key standards include ISO 9001 for manufacturing consistency and EN 1191 for resistance to repeated opening and closing. For commercial buildings, Fire Rating certifications (such as UL 10C or BS 476) are often mandatory, requiring doors to withstand fire for 30, 60, or 90 minutes. Additionally, check for Formaldehyde emission levels, ensuring they meet E1 or E0 standards to comply with international environmental health regulations.