Thermal Break windows (thermalized windows) are manufactured from close-tolerance aluminum extrusions. They have lower air leakage and higher resistance to heat transfer than non thermal break windows. Thermalized aluminum windows performance is equal to wood and UPVC windows and doors.
Thermal Break windows(thermalized windows) are tested to strict industry specifications. Air leakage with a 25 MPH wind blowing outside cannot exceed 0.375 cubic feet per minute (CFM) for every foot of weatherstripped window perimeter. Our series allows only 0.15 CFM air infiltration. Old windows often have rates of 1.5 or more, 10 times the air leakage of our Thermal Break windows(thermalized windows)!
