The Standard for Energy-Conscious Fenestration

ADTO’s Low-Energy Inward-Opening Window sets a new benchmark for sustainable building design. It is the result of advanced engineering focused on one core objective: minimizing environmental impact while maximizing occupant comfort through exceptional thermal insulation and airtightness.

ADTO Low-Energy Inward-Opening Window installed in a passive house design(right)

Unmatched Thermal & Technical Performance

Advanced Thermal Break Technology: At its heart lies a sophisticated thermally broken aluminum profile system. Manufactured on our high-tonnage extrusion lines, these multi-chamber profiles are designed to interrupt thermal transfer, delivering exceptionally low U-values for significant energy savings.

Triple-Seal Airtight System: Beyond thermal breaks, energy efficiency requires perfect sealing. Our windows integrate a sequential triple-seal gasket system around the entire perimeter, meticulously installed at dedicated assembly stations. This ensures minimal air leakage, enhancing comfort and reducing HVAC load.

Precision Inward-Opening Design: The inward-swing operation offers distinct advantages: secure and easy operation, safe interior cleaning, and excellent protection from wind-driven rain. The robust hardware, finished with a durable coating from our automated spray lines, guarantees smooth and reliable functionality for decades.

Close-up view of ADTO window's thermal break and multi-chamber profile design

Manufacturing Integrity at Every Stage

Quality is engineered into every window from the start. The process begins with precision cutting of high-grade aluminum alloys, followed by computer-controlled drilling and milling for perfect joint integrity. Each component then undergoes rigorous heat treatment to enhance its structural properties before moving to automated surface finishing.

 Precision processing (numerical control drilling and milling)

Validated by Rigorous Quality Assurance

Every single window is subject to stringent quality control checks at multiple points—from component inspection to final assembly verification. Furthermore, random units are tested in our in-house laboratory against international standards for air permeability, water tightness, wind load resistance, and thermal cycling to validate their performance claims.

 ADTO window undergoing water penetration test in a quality control laboratory

Ideal for Demanding Applications

This window is the optimal choice for:

Passive House and Low-Energy Building (LEB) certifications.

Commercial and residential projects in extreme climatic zones.

Renovations aimed at improving building envelope performance.

Hospitals, laboratories, and buildings requiring strict indoor environmental control.

A Sustainable Investment

Choosing ADTO is an investment in long-term value, reduced operational costs, and environmental stewardship. Our integrated manufacturing control, from raw material to final packaged product ready for shipment, ensures you receive a window that performs as promised.

 Professional packaging and loading of ADTO windows for secure shipment