Overview
- On his ITV show, Lewis promoted a one‑degree thermostat reduction that he says can cut heating costs by about 10% for many households.
- He advised lowering a boiler’s flow temperature to around 60°C, with reported savings of roughly £100 a year and best results on combi systems.
- The World Health Organization cites 18°C as suitable for healthy adults, though older people, young children and those with health conditions may need warmer settings.
- Targeted warmth options include heated throws, electric blankets and hot water bottles, with examples such as a 100‑watt heated throw costing about 20p for an evening and portable heaters running for roughly 20–50p per hour.
- Simple insulation and habits—radiator reflector foil, draught excluders, thick or thermal curtains, closing doors and smart placement of heaters—are highlighted, with cited examples of up to £40 a year from foil and up to £125 from draught‑proofing.