Heat Reflective Sleeve & APK Ducting for Diesel Heater Systems (8-150 mm)
Product Description
The heat reflective sleeve and APK ducting are designed for thermal protection and heat insulation in diesel heater air distribution systems, including clutch cables, hot air ducts, and heater outlet lines.
Manufactured by BSTFLEX, this product is engineered to be compatible with Chinese diesel heaters and widely used heater brands such as Webasto and Eberspacher.
The sleeve structure reflects radiant heat, reduces heat loss, and protects surrounding components from elevated temperatures in confined vehicle installations.
Available Diameter Sizes (Standard Range Table)
| Nominal Diameter |
Metric Size |
Typical Heater Application |
| 60 mm |
Ø60 |
Compact diesel heaters |
| 70 mm |
Ø70 |
Standard air outlet systems |
| 75 mm |
Ø75 |
Medium hot air distribution |
| 100 mm |
Ø100 |
High airflow heater ducting |
Material Structure Overview
| Layer |
Material |
Function |
| Outer Surface |
Heat Reflective Layer |
Reflects radiant heat |
| Base Fabric |
Fiberglass Fabric |
Fire resistance & strength |
| Inner Layer |
Insulating Core |
Reduces heat loss |
| Structure |
Flexible Sleeve / Duct |
Easy routing & installation |
Compatibility Table
| Heater Brand |
Compatibility |
| Webasto |
Suitable |
| Eberspacher |
Suitable |
| Chinese Diesel Heaters |
Suitable |
| Parking Heaters |
Suitable |
| Air Heaters (12V / 24V) |
Suitable |
Key Functional Performance
| Performance Aspect |
Description |
| Heat Reflection |
Reduces radiant heat exposure |
| Thermal Insulation |
Maintains air temperature |
| Component Protection |
Shields cables & ducts |
| Flexibility |
Easy installation in tight spaces |
| Durability |
Suitable for continuous heater operation |
Typical Applications
| Application Area |
Use Case |
| Diesel Heater Air Duct |
Hot air distribution |
| Clutch Cable Protection |
Thermal shielding |
| Vehicle Cab Heating |
Heat loss reduction |
| Marine Heater Systems |
Insulated air routing |
| Camper & RV Heating |
Compact heater installations |
Technical Specifications
| Item |
Description |
| Product Type |
Heat Reflective Sleeve / APK Ducting |
| Manufacturer |
BSTFLEX |
| Diameter Range |
60 / 70 / 75 / 100 mm |
| Base Material |
Fiberglass |
| Surface |
Heat Reflective |
| Application |
Diesel Heater Systems |
| Temperature Resistance |
Heater Air Application Grade |
| Installation |
Slip-on / Clamp Fixing |
| Length |
Customizable |
| OEM Supply |
Supported |
Advantages Compared with Standard Ducting
| Aspect |
Heat Reflective Sleeve |
Standard Air Duct |
| Heat Retention |
High |
Moderate |
| Radiant Heat Control |
Excellent |
None |
| Component Safety |
Improved |
Basic |
| Installation Flexibility |
High |
Standard |
| Service Life |
Longer |
Shorter |
Customization Capability
| Custom Option |
Availability |
| Diameter Selection |
yes |
| Length Customization |
yes |
| Reflective Layer Type |
yes |
| Packaging for OEM |
yes |
| Bulk Supply |
yes |
Application Notice
Proper diameter selection and secure clamping are recommended to ensure optimal airflow and thermal performance in diesel heater systems.
The heat reflective sleeve and APK ducting manufactured by BSTFLEX provide a reliable thermal protection and insulation solution for diesel heater air distribution systems.
With multiple diameter options (60-100 mm) and compatibility with Webasto, Eberspacher, and Chinese diesel heaters, this product is an ideal choice for vehicle, marine, and portable heater installations.
| Outer Layer Material |
Aluminum |
| Inner Layer Material |
Fiberglass |
| Heat Resistance |
250-350 °C |
| Diameters |
Ø8 mm - Ø140 mm |
| Length |
MAX 5m per roll, customs length upon request. |
| Length Tolerance |
±5 mm until 400mm., ± 1% for 400mm. and more |
| Nodes |
Min. 400 nodes / meter |
| Bending Radius |
Approximately 1.5 x ID |
| Thermal Resistance |
-40 C to + 350 C |