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    pnull's Avatar
    pnull Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Mar 12, 2007, 01:21 PM
    Banging noise from baseboard heating system
    I own a condo which I rent out to a young couple.

    There are 6-condos in each building with a boiler in the basement sending heat to each condo-unit upstairs. Each condo has baseboard heat and it's own thermostat.

    Every time the thermostat shuts the heat off, a very loud "bang" is heard. So loud, it wakes up my tenants... EVERY night. The condo association has not been able to find the source of this problem; air in the system, etc.

    My tenants take sleeping pills just to sleep through the night. They are threating to withhold rent if I can't get this fixed.

    HELP HELP HELP!!
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Mar 12, 2007, 03:31 PM
    1 Cycle the boiler and watch the pump when the unit goes off. It could be happening when the pump goes off. 2 Bleed air at the highest point in the system.
    Morrowrj's Avatar
    Morrowrj Posts: 345, Reputation: 22
    Full Member
    		  
    #3

    Mar 12, 2007, 03:38 PM
    Quote Originally Posted by pnull
    I own a condo which I rent out to a young couple.

    There are 6-condos in each building with a boiler in the basement sending heat to each condo-unit upstairs. Each condo has baseboard heat and it's own thermostat.

    Everytime the thermostat shuts the heat off, a very loud "bang" is heard. So loud, it wakes up my tenants...EVERY night. The condo association has not been able to find the source of this problem; air in the system, etc.

    My tenants take sleeping pills just to sleep thru the night. They are threating to withhold rent if I can't get this fixed.

    HELP HELP HELP!!!
    I assume you re running a multiple zone system. First I would check expansion tanks for correct pressure for your size system. If that is good, I have encountered a situation where some "cheaper" zone valves were used which close very quickly once the heat demand is met. When this occurs you can get a water hammer effect. They do sell slow close valves if this is determined to be the case.

    Good Luck,
    Morrowrj
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