Radiators.co.uk: 15,594 products moved from WooCommerce to Shopify

1. A product model built around how people buy radiators

We restructured the catalogue rather than copying it across.

• 15,594 WooCommerce products became 7,465 Shopify products with 15,289 variants
• Panel and LST radiators keep one page per size; column, designer and towel radiators offer height, width and colour options
• 34 custom data fields per product, including heat output at ΔT50, height, width, depth, finish, range and pipe centres
• 120 collections, including 82 heat output (BTU) band collections and brand collections

2. Content and data clean-up

Product facts were checked, never invented.

• 7,059 product descriptions migrated and 92 new ones written
• More than 4,000 product titles corrected
• Supplier barcodes, weights and depths added where the old data was missing
• 8,341 product images and 115 collection images migrated, with images linked to the right size and colour

3. SEO preservation

Every redirect was built from data and tested before launch.

• 18,405 301 redirects live, each a single hop, with every target resolving to a live page
• 20,381 old URLs with 16 months of Search Console clicks resolve to a working page
• The top 1,000 old URLs re-checked on launch day; new sitemap submitted to Search Console the same morning
• Product, BreadcrumbList, Organization and FAQPage structured data, with zero errors across the 32 pages audited

4. A storefront that helps people choose

Built on Shopify's Horizon theme with custom sections.

• A BTU calculator that reproduces the old site's formula exactly, on the home page
• A radiator finder and a "choose your sizes" multi-buy table
• Key specification strips, specification tables and colour swatches on product pages
• Predictive search with 31 synonym groups; product codes found every time in a 276-query test set
• New Help Choosing, FAQ, About and Trade pages

5. Email, orders and integrations

Six Klaviyo flows (18 emails) and a welcome sign-up form went live at launch, with a consent filter on every flow. Checkout and notification emails were branded and sent from an authenticated domain. Orders pass to Sage through a connector, numbered in a new range that follows on from the old site. See our approach to Klaviyo email marketing.

6. Launch day: a rehearsed, staged cut-over

The cut-over was rehearsed in full two days before launch. On the day, checkout was paused briefly for the final data check, the root domain was switched first as a test, then www, with a go/no-go check at each step and a rollback window. Neither domain needed rolling back, and the old site is kept for 60 days as a fallback. A welcome guide on the new store shows returning customers how to create a new account, check out and pay with Apple Pay.