Do you have any thoughts or plans on open-sourcing how the calculations are done? Assuming the values used in the calculations aren’t proprietary, it might be cool to do that :) That way no one can argue that the math is wrong.

You don’t have to, I think it’s rare for a company to do that, but it might fit with the transparency bit. Alternatively, if you list out where the numbers are coming from so that people can confirm the details manually.

Very cool regardless :)

My other suggestion would be to link information about the different types of heat pumps, or a guide on how to get the efficiency value. Similarly, if the heat pump question was at the end, in a toggle format so people can easily swap between the options and compare