Originally Posted By: janderson
This post was automatically imported from our archived forum.
I recently did an inspection in a multiple dwelling building. The building has a hot water (boiler) type heating system and small baseboard radiators located throughout. While inside several of the units I could hear a loud banging noise when the heat cycle kicked in. That is, when I positioned the thermostat in the unit to ask for heat a loud banging noise occurred immediately after the zone control valve opened.
The owner stated that several of the zone valves had been recently changed out and some air had gotten into the system--they explained that they had bled the air out of the system and basically told me their was nothing else they could do about the noise. This is a 17 unit building and several units were doing this.
I recommended further evaluation by a specialist. However, for my own learning purposes, does anyone out there have any other ideas about a possible cause for this banging noise? Is the owner full of BS and needs to bleed more air out of the system?
Within the seeds of ignorance lie the fruits of denial