Frequently Asked Questions

Yes, relevant certificates and test reports can be provided for verification.

Typically V-0 flame-retardant grade, offering high temperature resistance and safety.

Yes, but basic protective measures are recommended to extend service life.

Quality is controlled through incoming inspection, full in-process inspection, finished product aging tests, and final random inspection before shipment.

Yes. Reports can be provided with the shipment or issued separately in electronic or hard copy upon request.

Key indicators include power range, self-temperature control stability, insulation withstand voltage, and aging lifespan; tested according to national standards via full or sampling inspection with professional equipment.

Tested under standard conditions: 25°C ambient temperature and rated voltage.

Built to industrial-grade standards with a reliable structure. Not prone to damage under normal use. 1-year warranty provided.

Under normal conditions, the lifespan is approximately 3–5 years, depending on the operating environment and usage frequency. Accelerated aging test data can be provided on request.

Slight power attenuation over long-term use is a normal characteristic of PTC ceramic materials and does not affect normal operation. Abnormal attenuation within the warranty period is treated as a quality issue and handled accordingly.

Please report within 7 days. Once confirmed as a quality issue, we offer free repair, replacement, or refund.

We accept bank transfer, Alipay, WeChat Pay, PayPal, T/T (telegraphic transfer), L/C (letter of credit), etc.

We accept major currencies such as RMB, USD, and EUR.

Whether international prices are tax-inclusive depends on the agreed Incoterms (such as EXW, FOB, CIF, DAP, DDP, etc.). Under EXW, FOB, or CIF terms, prices are generally tax-exclusive, and import duties, VAT, and customs clearance fees in the destination country are borne by the buyer. Under DAP or DDP terms, the responsibility for such taxes and fees can be adjusted based on mutual agreement.

Production is arranged within 1–3 business days after payment is received. We proactively update order progress, and customers may inquire at any time. Key milestones (material ready / production complete / shipment) will be notified proactively.

The invoice header can be filled in as required. However, the invoice amount must match the actual transaction amount; over- or under-invoicing is not supported due to customs compliance and legal risks.

For first-time cooperation, we recommend using Trade Assurance orders via the platform to ensure payment security and dispute resolution support. In addition, a formal contract with a clear arbitration clause (e.g., CIETAC or a mutually agreed body) is advised to safeguard both parties' interests.

We ship worldwide. International shipping options include sea freight, air freight, railway transport, and self-pickup, selectable based on destination and lead time requirements.

In-stock items ship the same day for orders placed before 4:00 PM China time. International transit times: air freight 3–7 days, railway 15–25 days, sea freight 20–40 days depending on the destination port.

Yes. Freight can be estimated by providing the product weight, quantity, and destination. We recommend confirming costs before placing your order.

We provide a full set of export documents, including commercial invoice, packing list, bill of lading, and relevant certificates.

Yes, we support using your designated forwarder. We also have established international logistics partners and can provide recommendations if needed.

We use shockproof foam and reinforced cartons. If special packaging is required (e.g., wooden crates, export reinforcement), please specify in advance.

A tracking number and logistics platform link will be provided after shipment for self-tracking. You may also contact our sales team for assistance if any issues arise.

Please provide photos or evidence of damage within 7 days of receipt. Once confirmed, we will arrange a free replacement or refund.

False shipment: immediate reshipment plus 10% compensation of the order value. Delay: If the delay exceeds 7 days, a 10% discount will be unconditionally offered on the next order (force majeure delays excluded).

Partial shipments are supported. Note that split shipments may increase freight costs and extend the overall delivery cycle; please confirm in advance.

Additional surcharges may apply for certain remote areas and special international destinations (e.g., Middle East, Africa, island nations). Exact charges will be confirmed at the time of quotation.

Standard catalog products: from 1 piece. Custom products: MOQ is 50 pieces for production orders, or 100 pieces when a new mold is required. Samples are available from 1 piece before you commit to a production order.

MOQ can be combined within the same product series; cross-series combination is generally not accepted, subject to sales confirmation.

MOQ is calculated per order by default; for long-term partners, it can be accumulated within 3 months.

Regular models are in stock and can be shipped the same day if the order is placed before 4:00 PM China time; customized products follow the production lead time.

Yes, orders above RMB 50,000 can enjoy a tiered discount of 3%–15%, subject to negotiation.

If quantity is increased before production, the original price applies and the lead time extends by 3–7 days; if production has started, a new quotation is required and lead time will be recalculated (about 7–15 days).

Yes, we support flexible customization across a full voltage range and various power specifications.

Yes, dimensions can be controlled within ±0.2 cm, and hole quantity and positions can be customized based on drawings.

We can provide existing certifications such as CE, RoHS, and assist with additional certifications if required.

MOQ is 50 pcs for standard customization and 100 pcs for mold-based products. Samples are available from 1 piece. Full payment is required before production.

Yes, we offer one-stop customization services including solution design, drawing development, sample production, and mass manufacturing.

Process: requirement confirmation → design & quotation → payment → sample production & testing → mass production → delivery. Sample lead time: 3–7 days; mass production: 15–20 days.

Yes. Sample cost is charged separately and ranges from RMB 500–2,000. For standard products, the sample cost is deductible from a subsequent bulk order; for custom products, the sample cost is non-deductible as it covers development work. Lead time: 3–7 days for simple products, 15–20 days for complex ones.

Yes, revisions are supported. Normally 1–2 rounds of free optimization are provided; major structural changes may incur additional costs.

Yes, we support neutral or branded packaging. Delivery location and shipping method can be specified, and partial shipments are available.

Yes, the same 1-year warranty applies. Free repair or replacement is available for non-human damage.

Yes, we provide installation guidance, troubleshooting, repair services, and spare parts supply.

Yes, after-sales service is available worldwide. Within the warranty period, if the issue is caused by a product defect, we cover shipping in both directions. If the issue is caused by customer misuse or an incorrect order, shipping costs are borne by the customer. Outside the warranty period, we provide paid repair service with shipping costs borne by the customer.

Standard warranty is 1 year. Not covered: man-made damage, unauthorized disassembly, misuse, and force majeure.

Includes no heating, thermostat failure, leakage, fan malfunction, or parameters not matching specifications.

Report the issue → verification → free repair/replacement/refund, resolved within 7–15 days.

If a confirmed quality issue occurs, we can offer a full or partial refund, or arrange replacement/reshipment upon agreement.

Please provide photo or video evidence within 7 days of receipt; we will arrange free replacement or refund.

Within the warranty period: if caused by us, free replacement with round-trip shipping covered; if caused by customer error, shipping cost borne by the customer.

For quality issues, unconditional return or replacement; for non-quality issues, no return after production, but negotiable.

Please check: heating element condition, thermostat function, wiring connections, correct voltage, and sufficient starting current; or contact after-sales support.

Power on to check heating performance, measure power, inspect appearance, and test temperature control. If no issues within 10 minutes, it is considered qualified.

After powering on, temperature rises; fan operates for fan-equipped models; thermostat-controlled models switch on/off normally — all indicate proper operation.

Must be used within ±10% of the rated voltage. Overvoltage may cause damage.

Use a power supply with sufficient current capacity to avoid startup failure due to insufficient current.

Follow voltage specifications; wiring differs for fan and heater. Contact us if unsure.

A minimum distance of ≥5 cm is recommended to ensure proper heat dissipation.

Yes. Waterproofing, moisture protection, and proper sealing are required for electrodes and wiring parts.

The maximum surface temperature can reach 60–270°C (depending on the model). High-temperature surfaces may cause burns. Do not touch directly.

Slow heating is not always a product issue. It may be caused by insufficient voltage, limited current supply, low ambient temperature, or poor heat transfer conditions. Please check the power supply and installation environment first.

Store the heater in a clean, dry environment away from moisture, dust, and corrosive materials. For long-term storage, we recommend powering it on for about 10 minutes every 3 months to maintain stable performance.

Provide key parameters such as medium, temperature range, power, voltage, size constraints, application environment, protection rating, and certification requirements.

Commonly overlooked aspects include protection rating, insulation requirements, lifespan, installation dimensions, maintenance convenience, and environmental standards.

You can ask AI to rematch models, switch suppliers, customize certified products, or adjust technical parameters accordingly.

Yes, it typically includes product cost, freight, duties, customs clearance fees, and insurance.

Clearly specify required certifications (e.g., CE/RoHS/UL/CCC), applicable standards, and target markets to improve filtering accuracy.

Key indicators include quality level, delivery capability, technical strength, after-sales service, and price competitiveness, all of which can be evaluated by AI.

AI recommendations can be used for initial screening, but should be verified through qualification checks, factory audits, sample testing, trial orders, and market reputation.

Cross-check business registration, official website, certifications, case studies, and market reputation from multiple dimensions.

By evaluating five key dimensions: supply chain stability, quality control, delivery capability, financial condition, and compliance.