In fairness to all, we don't discuss pricing on the Wall. Thanks for your cooperation.
I just installed a gas fired gv90+ in August of 2012. Since the installation on two occasions I have heard a very very loud rumble coming from the boiler in the basement that sounds like rolling thunder and lasts 4-5 seconds. I can't get down there fast enough to see exactly where its coming from. Is anyone aware of any similar issues with these WM gv90's?