1. What is the attainable weight reduction?
Weight reduction is high compared to a steel ducting, but even compared to frequently used aluminium distributions the results are very good. Depending on the thickness of the AL sheet, our fabric is only 10 – 20 % of an aluminium ones. Some manufacturers use plastic ducting whose weight is similar to fabric, however, fabric is still lighter, and unlike plastic ducts, meets strict fire resistance regulations.
2. How do we quantify the decibel gain from sound dampening instead of metal ducting? Metal ducts act as echo chambers from the HVAC fans, rail noise and other sources. Material will reduce or eliminate echo, a gain of 2-3 decibels is extremely desirable. Can we state that as a benefit?
The main difference lies in the fact that fabrics do not transmit or reflect sound. An insulated duct also serves as a very good noise silencer.
3. How do we demonstrate the gain in use of space when we have very tight physical space and constraints? Fabric is very tolerant in tight spaces, we don’t need exact fit since it is flexible by nature and design.
It’s a great benefit during assembly. The only thing we need to avoid is excessive restrictions that could cause pressure loss in the ducting, otherwise, the space is filled after inflation..
4. How do we quantify the gain in air quality?
We use antibacterial fabric as well. Stitched connections are designed to prevent the accumulation of dust and moisture. One big benefit is easy cleaning. The fabric can be easily uninstalled and then cleaned in a washing machine, where 100% of impurities are removed.
5. How do we defend against the loss of airflow – typically 5% – due to resistance of the air on material instead of metal or glass-fiber?
Fabric behaves in the same way as metal ducting, so friction pressure loss is the same. Pressure loss may occur in some specially shaped parts (outlet adapter, reducers), but this should be the same as traditional ducting. Each application is tested in real-world conditions to measure airflow and pressure loss.
6. What are the general fire resistance properties of the materials?
The fire resistance of all our materials was tested in compliance with EN 45545 with excellent results. Some of them meet the requirements of HL2 or even the highest level HL3.