How we work

Our calculators

Our tools work from your own readings and your own tariff. They never store prices. The maths is shown on each tool page:

• Dehumidifier running cost: power (W) × hours × unit rate (p/kWh) ÷ 1,000.
• Dew point: the Magnus formula, with the coefficients cited on the tool page.
• Dehumidifier size: only bands copied from a manufacturer's published sizing guide, with the link and the date checked.

Products

We haven't tested these products; specs are manufacturer-stated and dated. We don't use review or rating schema, and we never publish commission rates.