# DNARENS (DanRens)

> DNARENS, operated by DanRens (Quanzhou) Intelligent Equipment Co., Ltd, is a China-based manufacturer and OEM/ODM supplier of HVAC control equipment: FCU thermostats, heating thermostats, room thermostats, fan-coil controllers, modulating electric valves, and related building-automation controls.

## Products
- DF220 — https://www.danrens.com/product/df220/
- AC818 — https://www.danrens.com/product/ac818/
- Modulating Electric Valve — https://www.danrens.com/product/modulating-electric-valve/
- Touchscreen Room Thermostat — https://www.danrens.com/product/touchscreen-room-thermostat/
- All products: https://www.danrens.com/products/

## Cases / Reference Projects
- Campus-Wide Energy Management for a University — https://www.danrens.com/case/campus-wide-energy-management-for-a-university/
- Terminal HVAC Management for an International Airport — https://www.danrens.com/case/terminal-hvac-management-for-an-international-airport/
- Workshop Ventilation for an Automotive Plant — https://www.danrens.com/case/workshop-ventilation-for-an-automotive-plant/
- Fresh-Air & Energy Recovery for a Shopping Mall — https://www.danrens.com/case/fresh-air-energy-recovery-for-a-shopping-mall/
- All cases: https://www.danrens.com/cases/

## Blog / Technical Articles
- Common HVAC Control Faults and How to Avoid Them — https://www.danrens.com/2026/07/28/common-hvac-control-faults-and-how-to-avoid-them/
- Smart Buildings and the Future of HVAC Controls — https://www.danrens.com/2026/07/28/smart-buildings-and-the-future-of-hvac-controls/
- A Maintenance Checklist to Extend HVAC Lifespan — https://www.danrens.com/2026/07/28/a-maintenance-checklist-to-extend-hvac-lifespan/
- All articles: https://www.danrens.com/blog/

## Company
- About: https://www.danrens.com/about/
- FAQ: https://www.danrens.com/faq/
- Contact: https://www.danrens.com/contact/

## Contact
- Email: jensen@danrens.com
- Phone / WhatsApp: +86 13959797818

## Notes
- Primary language is English, with Chinese content; the site serves global HVAC buyers, distributors, and engineering procurement.
- Product and article content is authored in English; CMS editing hints are in Chinese.
- Company: DanRens (Quanzhou) Intelligent Equipment Co., Ltd, Quanzhou, Fujian, China.