On Dec 6, 2005, at 6:26 PM, Karl Vacek wrote:
>
> Similarly off-topic. I've long wondered why residential HVAC systems
> don't
> have more sophisticated controls like commercial systems - thermostats
> that
> check the outdoor temperature and compensate accordingly.
They can...
> With today's electronics, it should be simple and cheap to offer a
> thermostat with an outdoor sensor, programmable compensation for the
> amount
> of bias to add with decreasing outdoor temperatures, electronically
> programmable setbacks, etc. etc.
Indoor and outdoor reset boiler controls. Monitor the amount of heat
being taked from the system while also monitoring outdoor air temp. I
believe there's an anemometer input too.
www.tekmarcontrols.com Decent products. Not so decent web page :-)
Boiler manufacturers like Viessman are making controls like this for
their boilers, and I believe they've done it for a while.
jim
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