Heating homes with hydrogen is neither cheap nor environmentally friendly
chemistryworld.com
chemistryworld.com
Yes and no. Yes in theory. But hydrogen burns much hotter, has a higher flame speed (spark -> boom!, not woosh!), and burns in a much greater range of concentrations in air, so leaks are...dangerous. Hydrogen is also very good at leaking.
I wouldn't have it near my house.
Edit: insulate and triple-glaze. Then you have a much smaller problem to solve, for both heating and cooling.
They're trying out this exact thing in the Netherlands right now. Appears to be technically feasible.