Heat exchanger for a window opening of a building

Simple SummaryContent extracted from patent full text and abstract with AI.

This patent describes a heat exchanger system integrated into a window unit for buildings. The device allows controlled airflows to move from the inside to the outside of a building and vice versa, exchanging heat between the outgoing and incoming air. The heat exchanger is built into the window structure itself, minimizing installation complexity and making it suitable for retrofitting existing buildings. The system can operate passively via convection or actively with fans, with design features to improve heat transfer and reduce energy loss while maintaining window transparency.

Use CasesContent extracted from patent full text and abstract with AI.

• Retrofitting existing buildings with energy-efficient ventilation systems without major renovations
• Improving indoor air quality in residential or commercial buildings while minimizing heat loss
• Applications in energy-efficient building designs and renovations seeking to meet stricter energy standards (e.g., Minergie, Passivhaus)
• Upgrading windows in schools, offices, or hospitals where efficient ventilation and thermal comfort are critical
• Use in hotels or apartments in cold climates to provide fresh air while retaining indoor heat

BenefitsContent extracted from patent full text and abstract with AI.

• Reduces heating energy consumption by recovering heat from outgoing air
• Enables fresh air ventilation without significant heat loss
• Can be easily installed into existing window openings—ideal for retrofitting older buildings
• Maintains the function and transparency of standard windows
• Offers both passive (no energy input) and active (fan-assisted) operation modes
• Minimizes indoor discomfort due to drafts or temperature fluctuations
• Reduces installation and operational complexity compared to centralized HVAC systems
• Can include features such as dust or dirt-resistant coatings for reduced maintenance

Technical Classifications (CPCs)

Inventors & Applicants

Patent Abstract

The device is installed at window opening of a building, and is designed such that an air flow (18) is generated from an inner side of a building to an outer side, and another air flow (19) is generated from the outer side of the building to the inner side. Heat is exchangeable between the former air flow and the latter air flow. The device is designed as an installed window (10), where heat exchangers are arranged within the window.