# Heating Controls Online > Heating Controls Online is a UK-based retailer and supplier of heating controls, thermostats, underfloor heating components, valves/actuators and related spares. This llms.txt points LLMs and agents to the site's canonical overview pages, category pages and key legal & contact resources that are LLM-friendly for inference-time use. Important notes: - Use the **Sitemap** for a full, machine-discoverable list of categories and product pages. - Prefer short category pages (listed below) when a compact context is required; follow product links only when product-specific detail is needed. - Legal and contact pages are authoritative for company, warranty, delivery and returns information. ## Sitemap & overview - [Site homepage](https://www.heatingcontrolsonline.co.uk/): Main store front and entry point. - [Sitemap (index of categories & pages)](https://www.heatingcontrolsonline.co.uk/index.php?route=information%2Fsitemap): Curated overview of categories and important pages. ## Key product categories (primary, short context) - [Thermostats (room/programmable/digital)](https://www.heatingcontrolsonline.co.uk/room-thermostats-c-21.html): Room thermostats and programmable/digital thermostat category overview. - [Traditional / Digital / Programmable Thermostats (subcategories)](https://www.heatingcontrolsonline.co.uk/traditional-thermostats-c-21_32.html): Short pages listing common thermostat types. - [Motorised valves & actuators](https://www.heatingcontrolsonline.co.uk/motorised-valves-actuators-c-24.html): Valve bodies, actuators and zone-control hardware. - [Underfloor heating (electric & wet)](https://www.heatingcontrolsonline.co.uk/underfloor-heating-c-44.html): Manifolds, mixing valves, mats, sensors and UFH accessories. - [Pumps & accessories](https://www.heatingcontrolsonline.co.uk/): (See sitemap for pump category pages) — use this when pump-level info is needed. ## Blogs & technical guides - [Technical Blogs](https://www.heatingcontrolsonline.co.uk/blogs): Contains technical blogs detailing product replacements. ## Downloads & technical docs - [Free downloads / technical docs (example PDF)](https://www.heatingcontrolsonline.co.uk/index.php?did=74&route=extension%2Fmodule%2Ffree_downloads%2Fdownload): Manufacturer/user manuals and small technical pamphlets — use for install/programming details when answering technical questions. ## Legal & policy (authoritative) - [Terms & Conditions](https://www.heatingcontrolsonline.co.uk/terms): Company terms for sales, warranty and returns — authoritative for legal claims and warranty guidance. - [Delivery / Shipping info](https://www.heatingcontrolsonline.co.uk/delivery): Official shipping methods and delivery guidance. ## Contact & company info (authoritative) - [Contact / Customer service](https://www.heatingcontrolsonline.co.uk/contact_us): Official contact point and email (sales@heatingcontrolsonline.co.uk) for clarifications, warranty & product enquiries. - [Companies House / company registration (reference)](https://find-and-update.company-information.service.gov.uk/company/07303811): Registered company information (Heating Controls Online Ltd). ## Optional (secondary resources — can be skipped for short contexts) - [Reviews.io profile](https://www.reviews.io/company-reviews/store/heatingcontrolsonline-co-uk): User reviews and reputational context. - Product pages (examples): individual product pages are available from category listings and should be followed only when specific product specs, part numbers or prices are required. ## Suggested usage guidance for LLMs/agents - Prefer the sitemap and category pages for concise context. Expand into product pages for part-specific installation, wiring, or spec questions. - When providing legal, warranty, delivery or company claims, cite the Terms & Contact pages listed above. - Treat review pages (Reviews.io) as user-sentiment context only — verify official claims against the site's Terms/Contact pages.