This page explains how DIY Home Calculators pages are produced and how mistakes are handled, so you can decide how much to trust what you read.
How pages are made
Each calculator and guide starts with a question people ask about their energy bills. I decide which inputs the answer needs, write the formula, and build the calculator. The guide is then written around worked examples that use the calculator's own code, so a number in a table cannot disagree with the tool.
Use of AI tools
Drafts of text are prepared with the help of AI writing tools. I review the drafts, remove claims I cannot support and run every worked example through the calculators to confirm the arithmetic. AI tools do not choose prices or sources on their own, and every cited fact links to the page where it was found.
Sources
I prefer primary sources such as regulators, energy agencies and official statistics. Where a figure comes from a company or a trade publication, the page says so and links to it. Example prices in calculators are examples, not forecasts, and each page tells you to replace them with the prices on your own bill.
What the site will not do
- It does not publish sponsored comparisons or rank products for payment.
- It does not hide the formula behind a tool.
- It does not ask you to enter personal data to see a result.
- It does not present an estimate as a quote.
Updates
Guides carry a date of the last update. Prices, grants and tariffs change, so pages that refer to them are reviewed when new figures are published. A page may be updated without a visible announcement when the change is small.
Corrections log
If you find an error, write to mudassar@hevizonetech.com. Confirmed corrections are listed below with the date.
No corrections have been logged yet.
Independence
DIY Home Calculators carries advertising. Advertisers have no influence over the content or the calculators, and advertising does not affect the order in which anything is presented.