[deegles]

Could you integrate a heat pump or solar tank pre-heater to this system and calculate how much it saves on gas? especially if you have on-demand pricing for electricity. it would be interesting to see it dynamically optimize depending on the price per BTU or some other metric.

[pandora-health]

Yes, there are hybrid heat pumps that can work with gas boilers. Such system can help to reduce gas usage by up to 70%. I am considering it :)