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  • Arduino Powered 3-zone thermostat

    Be careful about Air Temperature Rise in your furnace (supply side vs return side temp delta = Air Temperature Rise). ATR should be measured across the furnace and a safety shutoff built in when the ATR of the furnace is exceeded. If you have a furnace / air conditioner combo unit, ensure that there is enough airflow across the evap coil or it may freeze (when in cooling mode).

    Be careful about Air Temperature Rise in your furnace (supply side vs return side temp delta = Air Temperature Rise). ATR should be measured across the furnace and a safety shutoff built in when the ATR of the furnace is exceeded. If you have a furnace / air conditioner combo unit, ensure that there is enough airflow across the evap coil or it may freeze.

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