HousePayback asks whether your heat pump will pay for itself

Field notes

HousePayback divides household upgrade decisions into Energy, Moisture, and Power sections, with separate paths for the US, UK, and Australia. Its visible topic cards turn broad renovation questions into specific calculations: an air-source heat pump is paired with a 3.5 COP, generator sizing with surge margin, and backup systems with kWh and runtime. The homepage describes the broader project as including cost guides, payback math, and calculators, though the extracted page does not expose their underlying formulas or data sources.