"Historically the prices are about 3:1 for cost of electric radiant
heat vs utility natural gas. Of course this fluctuates over time with
markets, and regionally with local utilities. Electric (radiant) heat
is absurdly expensive."

Yes, but this house has a heat pump. You have to read through it a
couple of times to get it. He wants to know how a heat pump vs gas
furnace compares at todays natural gas prices, I think.