Heating Materials

Condensing boilers, radiators and the wet heating system components that keep a kitchen extension warm. What you specify drives Part L compliance, Gas Safe notification, and your running costs for the next fifteen years.

Condensing Boilers: Combi vs System, Sizing, and What to Buy in 2026

The complete UK guide to condensing boilers. Combi vs system, Part L 55°C flow rules, Boiler Plus 2018, Gas Safe notification, warranty conditions, and current prices from £688 supply-only to £5,500 installed.

Radiators: Types, Sizing for Part L 2021, Installation, and UK Prices

The complete UK guide to radiators: K1/K2 panel types, Delta T30 sizing for 55°C Part L flow temperatures, TRV and lockshield balancing, column rad pitfalls, and 2026 prices from £43.