How we work

Where the data comes from

Every product on this site comes from the public product data of the shop that sells it. A script reads it several times a day. Every price you see comes from the last reading and is checked again when it comes into view. We do not test products ourselves, and we do not publish ratings, rankings or "best of" lists we could not back with measurements.

Shops we read

We list only shops whose affiliate programme has accepted us, so every link from our pages to a shop is a paid link, marked "Ad" (see the disclosure). That keeps the number of shops small, and we add further specialist shops as their programmes accept us. Within these shops, the finders show every listing that fits your answers, sorted by your answers and by price.

The table counts the listings we currently show from each shop and names the day we last read its data.

Scroll right for more columns.

How figures are read

Seats, power, voltage, current, wood, size, height and wall thickness are taken from the product title, the size options, the structured product attributes or the product description. The product page shows each figure; where a figure is not stated, it says so. If a description names two different values for the same thing, or only a range across models, we leave the figure out rather than guess, and the product page says "not stated". The finder cards show only the name, photo and price; the details are on the product page. When a shop sells a model as "4-6 Person", the product page says "4 to 6 people" and the seat filter lists it under every group the range touches.

"120 V plug" on a card means the listing states 120 V, so the product plugs into a standard household outlet. "13 A plug" means the listing states 13 A together with a plug or socket and does not say the product must be hardwired, so it runs from a standard socket without a dedicated supply.

Prices

Prices are the shop's listed price, including the taxes the shop includes, before delivery. Every price of a listing, on the finder cards, in the tables and on the product pages, is the price from our last reading of the shop's data. When a price comes into view, we ask the shop again and replace it with the confirmed price as soon as the shop answers. A few shops block these live checks; for them we read the prices again throughout the day, normally every 15 minutes, and show the newer price with the time of that reading. If neither is available, the price from the last reading stays and the line says when it was read. The sources at the foot of each page name the date and time of the last reading for every shop, and each product page states it next to the price. Sales and stock change often; the shop's page always wins.

Each product page also shows a price history: every change of price or stock we have read, with the date and time of the reading. It starts on 30 September 2026, or with our first reading of a listing added later, and comes only from our full readings of each shop's data several times a day, not from the live checks or the 15-minute price checks. Where we change how we read a listing, the history says so, because prices before and after are not directly comparable. It records what the shop listed; it is not a forecast and not a judgement of whether a price is good.

Electricity prices and rules

US electricity prices come from the U.S. Energy Information Administration, UK prices from the Ofgem price cap, planning and building rules for England, Wales, Scotland and Northern Ireland from the published legislation on legislation.gov.uk, and the US model codes (IRC, IBC and ISPSC) from the International Code Council at codes.iccsafe.org. The list below names each source and the date we checked it.

Sources

Product names, prices and specifications come from the public product data of the shops in the table above, which we read automatically several times a day. Prices are as listed by the shop, including VAT in the UK where the shop includes it and before sales tax in the US, always before delivery. Each product page shows the time of its last reading, and prices are checked with the shop again when they come into view.

• U.S. Energy Information Administration (EIA), API v2 electricity/retail-sales, residential sector, retrieved 13 November 2026 from eia.gov.
• Ofgem, Energy price cap: average unit rate and standing charge, Direct Debit, England, Scotland and Wales, retrieved 13 November 2026 from ofgem.gov.uk.
• The Town and Country Planning (General Permitted Development) (England) Order 2015, Schedule 2, Part 1, Class E (revised text, legislation.gov.uk), retrieved 2 October 2026 from legislation.gov.uk.
• The Town and Country Planning (General Permitted Development) Order 1995, Schedule 2, Part 1, Class E as it applies in Wales (revised text, legislation.gov.uk), retrieved 2 October 2026 from legislation.gov.uk.
• The Town and Country Planning (General Permitted Development) (Scotland) Order 1992, Schedule 1, Part 1, Class 3A (revised text, legislation.gov.uk), retrieved 2 October 2026 from legislation.gov.uk.
• The Planning (General Permitted Development) Order (Northern Ireland) 2015, Schedule, Part 1, Class D (revised text, legislation.gov.uk), retrieved 2 October 2026 from legislation.gov.uk.
• International Code Council, ICC Digital Codes, I-Codes, retrieved 2 October 2026 from codes.iccsafe.org.

Drawings and photos

The drawings on this site are our own. They show a type of product, not a particular model. Product photos on the finder cards and product pages come from the shops whose affiliate programme has accepted us, taken from their product feed or their own website; a product page shows all photos the shop lists for the product.

Data files

The same data is published as JSON, CSV and Markdown files that anyone may use with credit, each price with the time it was read. For AI assistants and developers lists the files and explains the licence.

Price and stock alerts

On a product page you can ask for an email when the price falls to a price you choose, or when a sold-out product is back in stock. We check these alerts after each of our readings of the shop's data, and only count a change once a second reading confirms it, so a one-off glitch in the shop's data does not trigger one. The email says which product, at which price and when we read it. Every alert sends one email and then ends. We use the address only for the alerts you set, never for a newsletter, and every email has a link to stop that alert or to manage all of them. The privacy page says what we store.

Mistakes

If you spot a wrong figure, tell us at the address in the imprint and we will fix the reading rule, not just the one product.