20 questions on insulation, heating, solar, batteries and smart tariffs. Most people overrate new windows and underrate a £50 roll of draught strip — see how you score. No signup, nothing stored, honest feedback at the end.
Educational content only — not financial or technical advice. UK costs, grant amounts and tariff figures verified ; schemes, price caps and tariffs change, so check gov.uk before spending. Always get multiple quotes and a proper survey.