Warm air hoses are indispensable in the mobile heating industry. Find out here what they are used for, what you should consider when using them, and what differences exist.
Inhaltsverzeichnis
What Is a Warm Air Hose?
It is a flexible, usually insulated or heat-resistant pipe, primarily used for the transport of warm air, exhaust air, or gases in a temperature range of typically -20 °C to approx. 150 °C.
It differs from a pure “air hose” by its specific design for higher temperatures and is distinguished from a “hot air hose” (up to +1,100 °C) by its lower temperature range.
Warm air hoses are often highly flexible, compressible, and feature a spring steel spiral for dimensional stability. They are made from various materials such as PVC-coated fabrics, neoprene, TPV (thermoplastic vulcanizates), or a combination.
Thus, warm air hoses are flexible and compressible pipes designed for higher temperatures, predominantly used for the transport of warm and exhaust air.
What Are Warm Air Hoses Used For?
Warm air hoses are used wherever warm air is needed for heating, drying, or ventilation.
| Application Area | Specific Use |
|---|---|
| Construction | Construction heating and drying (e.g., after water damage or in new buildings during winter) to accelerate construction processes |
| Events/Logistics | Tent heating for events, trade fairs, or in temporary storage halls |
| Agriculture | Grain drying and wood drying |
| Industry/Trade | Hall heating, ventilation, and extraction of exhaust air or gases in production facilities |
| Vehicle Technology | Distribution of warm air in motorhomes (e.g., Truma heaters) or for fresh air supply |
| Air Conditioning | As a duct hose for ventilation, heating, and air conditioning systems |
What Must Be Considered When Using Warm Air Hoses?
The safe and efficient use of hoses requires attention to several factors:
- Temperature Resistance: The hose must be designed for the maximum conveying temperature of the medium. Exceeding the maximum operating temperatures poses a risk of material damage or the release of harmful substances.
- Medium: Warm air hoses are primarily designed for air and gases. The conveyance of aggressive chemicals, abrasive materials, or liquids requires special hoses.
- Pressure Loss: A diameter that is too small or a length that is too great can lead to a significant pressure loss, which reduces the efficiency of the heating or drying system.
- Flexibility and Compressibility: High flexibility allows for easy installation, but the hose should not be unnecessarily sharply kinked or bent beyond its minimum bending radius.
- Insulation: For optimal heat transfer and energy efficiency, especially over longer distances or in cold environments, an insulated warm air hose should be used.
- Installation: The connection elements (clamps, reducers) must be heat-resistant and tight to prevent warm air loss.
What Are the Different Types of Warm Air Hoses?
Warm air hoses can be distinguished by material, construction, and temperature range:
| Type/Material | Temperature Range (approx.) | Properties and Construction |
|---|---|---|
| PVC-coated Fabric | Up to +100 °C / +120 °C | Cost-effective, often sewn (lightweight air duct), very flexible and compressible; frequently used for construction heating and tent heating |
| Neoprene | Up to +135 °C / +150 °C | Good chemical resistance, often 2-ply, more pressure-resistant than PVC hoses |
| TPV (Thermoplastic Vulcanizates) | Up to +130 °C | Highly flexible, good resistance to ozone and weathering |
| APK (Aluminum-Paper-Plastic) | Up to +100 °C | Multi-layer construction, good insulation properties, often used in vehicle technology (e.g., Truma heaters) |
| Silicone-coated Fiberglass Fabric | Up to +300 °C (Hot Air) | Already belongs to the hot air hoses, but is often mentioned as a higher category. Extremely heat-resistant, good cold flexibility |
References:
Foxiflex. (seen on 10.10.2025). Warmluftschläuche für Bautrocknung & Zeltbeheizung.
Schlauch-Profi. (seen on 10.10.2025). Silikon Heißluftschlauch zweilagig (SIL 2) bis +300 °C.