Thermal performance is assessed using U-value measurements, which indicate the rate of heat transfer through the doors and windows. Lower U-values signify better insulation. Testing includes evaluating the effectiveness of thermal breaks in reducing heat loss and gain.

Air tightness tests measure the ability of doors and windows to prevent air leakage. High air tightness ensures energy efficiency by minimizing drafts and maintaining stable indoor temperatures. This is typically tested under pressure differences to simulate real-world conditions.

Acoustic performance tests measure the ability of doors and windows to reduce noise transmission. High-performance products provide excellent sound insulation, which is particularly important for buildings in noisy environments.