Cost calculator
Gas installation & boiler cost calculator
A simple heat loss estimate suggests boiler capacity (kW) and gives a material + labour range. Sample prices; final price after the survey.
Home type
Rooms (excl. kitchen)
Bathrooms
People
Floor position
Insulation
Heating system
Current situation
Heat loss coefficient used: 95 W/m². Radiator length assumes 600 mm double panel ≈ 1,600 W per metre.
How the estimate works
Heat loss ≈ area × unit loss (W/m²), corrected for floor position and house type. The boiler is the next standard size above 1.1 × heat loss, but never below 24 kW because a combi boiler also heats tap water instantly.
Unit prices are managed by the company in its panel and update this page instantly.