Frequently Asked Questions

We manufacture a complete range of HVAC control products: FCU thermostats, heating thermostats, room thermostats, fan-coil controllers, modulating electric valves, motorized and solenoid valves, dampers and damper actuators, plus temperature and humidity sensors.

Yes. We provide OEM and ODM services including logo printing, custom colours, packaging, firmware and interface language. With 17 years of R&D experience in temperature control, we support one-stop development from concept to finished product.

Tell us the system type, supply voltage, control signal and installation environment. Our technical team will recommend matched models and send the datasheets — email or WhatsApp works best.

Yes. Our products are designed and built to the requirements of your destination market, and we can arrange third-party testing and certification (for example CE, RoHS, RED, FCC or REACH) for your order. Lead time and cost depend on the model and order quantity — tell us your target market when you send the enquiry and we will confirm the details.

Yes. We are a manufacturer with our own factory, R&D department and sales team in Quanzhou, China. Factory visits — in person or by video call — are welcome; contact us to arrange a time.

We can supply 30,000–50,000 pieces per month, depending on the model mix and order structure.

• Express — DHL, FedEx, UPS, TNT (door to door)
• Air freight (airport to airport)
• Rail freight
• Sea freight (port to port)
• FCA — you nominate your own forwarder

Standard packaging is our neutral box. Custom OEM box design is also available — the packaging cost is quoted separately.

We accept T/T (bank transfer). Other payment terms can be discussed for long-term or large-volume cooperation.

Sample orders: 1–3 working days. Bulk orders: 2–3 weeks. OEM orders: the lead time depends on the specific requirements of the project.

50 pcs for standard products with our own logo or neutral packaging. For OEM logo versions the MOQ is 300 pcs.

Yes, samples are available for evaluation. For standard models we ship immediately after payment, usually 5–7 working days by express. The sample cost is refunded once you place a formal order.

Send us the model, quantity and destination through the contact page, by email at jensen@danrens.com, or by WhatsApp at +86 13959797818. You will receive a quotation within 24 hours.

A dedicated after-sales team is available 24/7 to help you resolve technical or order-related issues.

24 months. Within the warranty period we repair or replace any defective unit free of charge.

It depends on your market and annual order volume, as we already work with partners in some countries. Send us your company profile and target market, and we will discuss the details.