How do I use the boiler plant duty calculator?

Enter your design inputs below and click Calculate. The tool applies UK building services methods for boiler plant duty and reports results with assumptions.

What standard applies to boiler plant duty?

Confirm the relevant British Standard or Approved Document on your project. This calculator is for first-pass sizing — verify against the issued specification before sign-off.

Can I save boiler plant duty results in BuildFlo?

Sign up for a free BuildFlo account to save calculation results in your project workspace and attach them to your calculation folder.

BuildFlo Design Guide · Thermal · Thermal

boiler plant duty calculator for UK building services

Plant kW from AHU coils, emitters, DHW appliances and failure scenarios. Free UK boiler plant duty calculator with thermal guidance.

What this calculator does

Boiler plant duty helps UK building services engineers with plant kw from ahu coils, emitters, dhw appliances and failure scenarios. The calculation follows Thermal methods used in everyday MEP design — enter your project inputs below for a first-pass result.

Whether you searched for "boiler plant duty", "boiler plant duty calculator", or "how to boiler plant duty", this page gives you a working tool plus the context to use it on a real job.

When to use it

Use this for early-stage sizing and sanity checks on UK building services work. It is not a substitute for issued calculations — verify against the project specification, drawings, and relevant standard before sign-off.

How to use it

1. Fill in the inputs for your scenario (defaults are starting points only). 2. Click Calculate — results include the method and assumptions where applicable. 3. Verify against the project specification and relevant standard before issuing.

Typical output unit: kW.

Tips

Defaults are indicative — replace with project-specific values from the architect, structural, or MEP spec.
For issued calculations, save results in your BuildFlo project and attach to the calculation folder.
Need the regulation citation? Open BuildFlo chat in the app and ask about boiler plant duty under UK standards.

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Frequently asked questions

How do I use the boiler plant duty calculator?: Enter your design inputs below and click Calculate. The tool applies UK building services methods for boiler plant duty and reports results with assumptions.
What standard applies to boiler plant duty?: Confirm the relevant British Standard or Approved Document on your project. This calculator is for first-pass sizing — verify against the issued specification before sign-off.
Can I save boiler plant duty results in BuildFlo?: Sign up for a free BuildFlo account to save calculation results in your project workspace and attach them to your calculation folder.