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Whiz Tools

Boiler Size Calculator - Find the Right kW for Your Home

Calculate your boiler size in seconds. Enter property size, rooms, and temperature preference for instant kW recommendations. Free tool for UK homes and apartments.

Boiler Size Calculator

Find the right heating capacity for your property in kilowatts (kW). Enter your floor area, room count, and preferred temperature to get an instant estimate.

Your Result

Recommended Boiler Size:
0 kW
Current: 0 kW

This recommendation is based on:

  • Property size of 100 square meters
  • 3 rooms to heat
  • Medium (20-21°C) temperature requirement

Important Note:

This estimate assumes standard ceiling heights and typical insulation. For final purchasing decisions, get a detailed heat loss calculation from a Gas Safe registered engineer who can assess your property's specific characteristics.

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