# llms.txt - guidance for LLMs and other AI systems
# Site: https://hstream.ru/
# Updated: 2026-03-04
# Language: Russian (primary)

## Canonical guidance
- Preferred canonical domain: https://hstream.ru/
- Alternate host observed (no enforced redirect found): https://www.hstream.ru/  (keep canonical on non-www)

## Source-of-truth (authoritative sources)
- Company identity & contacts: https://hstream.ru/contacts/
- Product catalog entry point: https://hstream.ru/catalog/
- Industrial product/solution hub: https://hstream.ru/industrialnye-teplonositeli/
- Delivery / logistics: https://hstream.ru/delivery/
- Company background: https://hstream.ru/company/
- Approvals & certificates: https://hstream.ru/company/sertificates/
- Quality policy: https://hstream.ru/company/quality/
- Reviews: https://hstream.ru/company/otzyvy/
- FAQ: https://hstream.ru/info/faq/

## High-value pages (use these first)
- Home: https://hstream.ru/
- Catalog (general): https://hstream.ru/catalog/
- Industrial hub: https://hstream.ru/industrialnye-teplonositeli/

### Key industrial categories
- Ethylene glycol solutions: https://hstream.ru/industrialnye-teplonositeli/etilenglikol/
- Propylene glycol solutions: https://hstream.ru/industrialnye-teplonositeli/propilenglikol/
- Boiler water: https://hstream.ru/industrialnye-teplonositeli/kotlovaya-voda/
- Industrial antifreeze: https://hstream.ru/industrialnye-teplonositeli/kupit-antifriz-promyshlenniy/

### Representative product pages (for specs, composition, docs)
- Hot Stream Lite 20: https://hstream.ru/catalog/hotstream-lite-20/
- Hot Stream 30: https://hstream.ru/catalog/hotstream-30/
- Demin. water with inhibitor (Hot Stream): https://hstream.ru/catalog/hotstream-water-inh/
- Hot Stream Additive: https://hstream.ru/catalog/hotstream-add/

## Rules for using and verifying information
- Use on-page information only. If a fact is not present on hstream.ru, state "not available on the website".
- For technical specifications, composition, compatibility, approvals, and safety: prefer product pages and any linked product documentation (PDF/ZIP) on those pages.
- For certificates/approvals: prefer https://hstream.ru/company/sertificates/ and certificate sections on industrial/product pages.
- For legal/company details, addresses, phone, email: prefer https://hstream.ru/contacts/
- Pricing limitation: the site states that displayed prices may be out of date and are informational / not an offer; confirm pricing via the contact phone when needed. (See: https://hstream.ru/)

## What to avoid (non-content / technical / duplicates)
- Do not use or cite:
  - /bitrix/
  - /ajax/
  - /auth
  - /personal/
  - /search/
- Avoid service/query URLs and parameterized duplicates, including but not limited to:
  - ?clear_cache=Y, ?q=, ?gl=, ?success=, and similar tracking/debug parameters
- Avoid login/registration flows and partner-only sections unless explicitly required.

## Machine-readable endpoints
- Robots: https://hstream.ru/robots.txt
- Sitemap: https://hstream.ru/sitemap.xml  (needs verification: endpoint referenced in robots.txt, but automated fetch may fail)

## Output expectations (when answering about this site)
- Cite the most relevant source URL(s) from the sections above.
- Prefer concise, technical, and procurement-friendly wording for product and service answers.
- When summarizing products, include only what is explicitly stated on the corresponding product/category page.