What insulation thickness is available?

Common insulation thicknesses include 25 mm and 50 mm. Other thicknesses can be customized based on project requirements.

Is the flexible duct easy to install?

Yes. The lightweight and flexible structure allows quick installation and reduces labor costs.

Can the duct reduce noise?

The insulated layer helps reduce heat loss and provides excellent sound absorption performance, improving indoor comfort.

What is your minimum order quantity?

The MOQ depends on the product specification and customization requirements. Please contact us for detailed information.

Can you provide samples?

Yes. Samples are available for quality evaluation. Customers only need to cover the shipping cost.

What certifications do your products have?

Our products can comply with relevant international standards and certifications according to customer requirements.

Firstflex Flexible Return Duct for Central Air Handling Unit

Name: Firstflex Flexible Return Duct for Central Air Handling Unit
Brand: Tianjin Iking Gerui Tech Co., Ltd.
SKU: 2179007282

Tianjin, ChinaTianjin Iking Gerui Tech Co., Ltd.

US$2.00

1,000 Square Meters

Product profile

Customization

Available

After-sales Service

Installation Instructions

Warranty

1 Years

Model NO.

Firstflex Insulation Flexible Duct

ventilation mode

natural ventilation

Certification

Color

Yellow, Pink

Function

Temperature Control

Size

Customized Size

Package

Carton

Core Material

Glass Wool

Diameter

50mm-650mm

Insulation Thickness

25/30/75mm

Temp Range

30℃~150℃

OEM/ODM

Available

Application

HVAC, Commercial Ventilation, Fresh Air System

Length

10m / 25FT

Max Operating Pressure

3000PA

Transport Package

Carton/ Plastic Bags Package

Trademark

FIRSTFLEX brand

Origin

China Mainland

HS Code

701980

Production Capacity

10, 000 Tons/Month

Key features

Multiple Insulation Materials: Available in fiberglass, polyester, and formaldehyde-free glass wool options.

Customized Sizes and Lengths: Diameters from 40mm to 650mm with custom lengths available per request.

Class A2 Fire Resistance: Meets high fire safety standards with maximum Class A2 fire resistance rating.

OEM and ODM Services: Full customization support for sizes, thicknesses, packaging, and private labels.

Excellent Noise Reduction: Superior sound absorption performance improves indoor comfort and reduces noise.

Easy Installation: Lightweight and flexible design allows for quick installation and reduced labor costs.

Eco-Friendly and Safe: Formaldehyde-free and fiber-free options ensure safe indoor air quality.

Company profile

High Repeat Buyers ChoiceMulti-language PioneerExhibition Experience

Tianjin Iking Gerui Tech Co., Ltd.

Tianjin, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 4 years CertifiedNearest Port: Tianjin PortAverage Response Time: ≤2.14h

AI-Powered supplier vetting

SummaryThe supplier is identified as a professional technical supplier operating a glass wool production line. It offers broad customization, ODM, OEM for well-known brands, in-stock capability, and reported lead times within 15 working days in both peak and off-seasons. Export activity represents 51%–70% of total sales, and the supplier has participated in the MOSBUILD trade show. However, it does not provide 3D software design, SDKs, overseas warehouses, overseas showrooms, overseas agents or branches, and it has no valid manufacturing-capacity contract with related subcontractors. Complaint handling has a clear procedure and records, but corrective/preventive-action procedures and supplier-service assessment procedures are not documented. Quality assurance is reported, while finished products are checked by packing staff. Financial records are indicated for 2022–2024, but no financial amounts or performance metrics are provided. No factory environmental-impact assessment report is available.

Supplier typeThe supplier is explicitly identified as a professional technical supplier and operates a glass wool production line. It has export activity, but no overseas agents, branches, warehouses, or showrooms; therefore, it appears primarily production-oriented rather than an overseas service-network supplier.

R&D capabilityThe supplier reported new products in the past year and provides ODM services, OEM services for well-known brands, and broad design customization. However, it has no available SDK, does not provide 3D software design, and has not established an AI model for data-driven management, so innovation capability is mixed rather than fully demonstrated.

Production capacityEvidence includes in-stock capability, reported lead times within 15 working days in both peak and off-seasons, five qualified suppliers, and a glass wool production line. Conversely, there is no valid manufacturing-capacity contract with related subcontractors, finished products are checked by packing staff, and supplier-service assessment procedures lack written procedures or records.

Customization capabilityThe supplier explicitly offers customization from samples, customization from designs, full customization, minor customization, and flexible customization. Its ODM capability further supports product-design and manufacturing adaptation, although 3D software design is not available.

Client casesThe supplier reports OEM service for well-known brands, has participated in the MOSBUILD offline trade show, and has exported goods for four years, with exports representing 51%–70% of total sales. These are direct indicators of market and customer experience, although no customer names, project details, or verifiable case studies are supplied.

Product Q&A

Q:What is the application of an insulated flexible duct?

Insulated flexible ducts are widely used in residential buildings, commercial HVAC systems, offices, shopping malls, hotels, hospitals, factories, and ventilation projects.

Q:What insulation materials are available?

We offer fiberglass insulation, polyester insulation, and formaldehyde-free glass wool insulation to meet different thermal and acoustic requirements.

Q:What sizes can you supply?

Standard diameters range from 80 mm to 610 mm. Customized sizes and lengths are also available according to customer requirements.

Q:What is the operating temperature range?

The operating temperature depends on the insulation material and duct structure. Please contact us for the recommended temperature range for your specific application.

Q:Can you provide customized products?

Yes. We support OEM and ODM services, including customized sizes, insulation thicknesses, packaging, and private labels.