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Furnace water temp controller

Does anyone know the name of the thermostat that mounts on the outside of the house and controls the water temperature of the furnace depending on outside temperature? The higher the outdoor temperature the lower the water temperature for baseboard heat.
Thanks.

canuk
Re: Furnace water temp controller

I believe they're called outdoor reset controls.

artrans
Re: Furnace water temp controller

I would like to no the name of the unit used on this old house sunday night 11/15/08 it was a nice small unit. called outdoor reset control thank you art

webbf
Re: Furnace water temp controller

The control is a Tekmar part number 256. The cost is about $150 on the net.

artrans
Re: Furnace water temp controller

thank you for that part number art

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