VDI 2087 Air Ducts Operating and Construction Fundamentals (2006)
The main design requirements for air ducts are as follows:
- smooth interior (low pressure drop, low dust accumulation),
- easy to clean, durable,
- non-corroding and
- air-tight (permitted air flow leakage to comply with DIN EN 13779).
The requirements presented in this norm summarize well the properties of the METU-FORM duct system.