Boiler Calculators
Find the perfect boiler, estimate costs, and see how much you could save with our free calculator tools
Boiler Replacement Calculator
Find the perfect boiler type, size, and get installation cost estimates based on your home's requirements
Boiler Replacement Calculator
What type of property do you have?
How many bedrooms do you have?
How many bathrooms do you have?
Why Use Our Calculators?
- Get accurate boiler size recommendations based on your property
- Estimate installation costs and avoid unexpected expenses
- Calculate potential savings with a more efficient boiler
- Understand your home's heating requirements
- Make informed decisions about your heating system
Expert Tip
The right sized boiler is crucial for efficiency. An oversized boiler will waste energy through excessive cycling, while an undersized one will struggle to heat your home adequately and wear out faster.
Our calculators help you find the perfect balance based on industry standards and real-world data.
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Here's what our calculator recommendations mean for your home
Boiler Types
- Combi Boilers: Provide instant hot water without tanks. Ideal for smaller homes with 1-2 bathrooms.
- System Boilers: Work with a hot water cylinder. Better for homes with multiple bathrooms and higher hot water demand.
- Regular Boilers: Require both cold water and feed tanks. Suitable for older properties with existing traditional systems.
Boiler Sizing
- 24-27kW: Suitable for small to medium properties with 1-2 bedrooms and 1 bathroom.
- 28-34kW: Ideal for medium-sized homes with 3-4 bedrooms and 1-2 bathrooms.
- 35-42kW: Recommended for larger properties with 4+ bedrooms and multiple bathrooms.
Cost Considerations
- Installation Costs: Include removal of old boiler, new boiler unit, parts, labor, and system flush.
- Running Costs: Affected by boiler efficiency, household size, and usage patterns.
- Efficiency Savings: A new A-rated boiler can reduce bills by up to 30% compared to an older G-rated model.
Remember, while our calculators provide accurate estimates, a professional survey by a Gas Safe engineer will confirm the exact requirements for your home.
Book a Professional Boiler Survey