Damper

[Stephen G Sheldon]

Recently inspected a house that had a single thermostat but had a switch on the wall outside the furnace room labelled "damper" with three settings: 1,2 and 3. Anyone seen anything like this before? Any suggestions on how to report on something like this?

[James Vincent]

Sounds like a zoned HVAC duct system. Did you operate the damper while the A/C was on the determine if you were getting an increase or decrease in air flow to a certain section of the home?

[Stephen G Sheldon]

Could not get any change in air flow at different settings 1,2, or 3

[James Vincent]

Sounds like remotely operated HVAC damper is not operating properly. Did you happen to spot a damper control unit on any of the duct work?

[Stephen G Sheldon]

No. Where would I look? The only accessible area would be immediately next to the furnace

[James Vincent]

Is there ducts in attic or just between floors? Of course if it doesn't work it doesn't work. Sounds like you are- Unable to determine that HVAC Damper System is functioning properly...... You can Google Remote HVAC Dampers to get a better idea of what you are looking for. You could call your local HVAC Tech to see if they have ever come across such systems..

[Stephen G Sheldon]

Vincent, thanks for your help.