ASTM E 1007-97/E 989-89 Independent Test Results (Done by Octave Acoustique Inc.) Acoustic tests from different companies compared QuietStride 3.5mm with other leading brands of underlayments.
QVM9 COMBINATION BOILER A Complete Multi-Purpose Heating System. 90+% Efficient Condensing Operation. Smooth, Quiet and Vibration-Free. Easy to Handle and Install.