What this site covers
North Window Daily publishes technical information about passive and energy-efficient window systems as applied to residential buildings in Poland. The content covers U-value measurement and calculation, glazing and frame specifications, installation methods, and the regulatory framework established by Warunki Techniczne (WT 2021).
The site is organised around three principal topics: thermal performance metrics, installation practice, and building energy regulations. Each article includes references to publicly available primary sources, including Polish legal acts (via ISAP), European standards, and Passive House Institute documentation.
Scope and limitations
Information on this site is of a general technical nature and reflects publicly available data and standards at the time of writing. It does not constitute professional advice for specific construction projects. Building regulations and standards are subject to amendment; readers are advised to verify current requirements through official sources before making design or specification decisions.
The site does not represent any manufacturer, supplier or trade association. No product endorsements are made. References to specific technical values (such as U-value targets or EP limits) are based on published standards and regulations cited within each article.
Content update policy
Articles carry a visible update date. The editorial approach prioritises accuracy over volume: content is updated when referenced standards change or when significant factual corrections are required. Readers who identify an error or outdated reference are encouraged to use the contact form on the home page.
Contact
For questions related to content, corrections or topic suggestions, use the contact form on the home page. General enquiries can also be sent to info@northwindowdaily.eu. Response times are within five business days.
External sources used on this site
Articles on this site reference the following authoritative sources:
- ISAP — Internetowy System Aktów Prawnych (Polish Legal Acts Database)
- Passive House Institute (PHI), Darmstadt
- Passivhaus Trust (UK)
- ISO — International Organization for Standardization
- RAL (Deutsches Institut für Gütesicherung und Kennzeichnung)
Page last updated: May 2026