Noisy side vent

In most cases power vents are used when a house has no chimney. Is this the case?

I have no chimney for the boiler but do have one for my fireplaces. My heating guy told my to replace the vent with a chimney. To make a long story short, I had a hard time lining up a mason and was looking for a short term fix.

The make of the power vent is a Tjernlund products HST-1. The noise seems to be the result of vibration. I made a clamp that has greatly reduced the vibration and noise, but was look to see if I could just find a quit power vent.