Contact

This page is for messages about the site itself: a figure that has moved on, an explanation that could be clearer, a link that no longer works. Questions about heat pumps are better sent from the ask a question page, which explains what details help.

Prices go out of date first

The figures most likely to date are the energy prices. The site uses Ofgem's price cap for 1 October to 31 December 2026, and the cap is reset every quarter, next on 1 January 2027. If you are reading after that date and the calculator's defaults look stale, we would like to know, although the calculator always lets you type in your own unit rates from a bill.

Statistics and field data

Grant statistics are published monthly and field trials publish final results after interim ones. If a newer release changes a number we quote, send the link to the new figure and the page that uses the old one. We check the source, change the page and move its check date forward.

Explanations that could be better

Physics is easy to explain badly. If a step in the cycle, a term in the glossary or a sentence about efficiency left you more confused than before, say which and why. Plain-English fixes are among the most useful messages we receive.

A note on the calculator's assumptions

Two of the calculator's settings are assumptions rather than measurements: the boiler efficiencies of 85% and 90%, which are labelled as such, and the default heat pump efficiency of 2.8, taken from a field trial's interim median. If you think either is unreasonable, or know of newer field results, we would welcome the reference. The calculator lets readers change both, so the defaults matter mainly for people who do not.

Links and sources

Government pages move. If a source link at the foot of a page now lands somewhere unexpected, tell us the page and we will find the new address or a replacement source.

How replies work

Messages are read by SEO-DONS LTD and answered by email; there is no phone line. We do not pass messages or contact details to manufacturers or installers, and we do not add anyone to a mailing list.

The publisher

Published by SEO-DONS LTD (company no. 16766013), 71-75 Shelton Street, Covent Garden, London WC2H 9JQ. Its entry on the Companies House register shows the registered office and directors.