The Ubbink Air Excellent AE34C Adjustable Air Restrictor Valve is a precision airflow control accessory designed for use with Air Excellent distribution boxes. It allows accurate, individual adjustment of airflow for each connected duct, helping you achieve a perfectly balanced and energy-efficient ventilation system.

This external air restrictor valve connects directly to the distribution box and can be used across the full Air Excellent duct range with the appropriate converters. Airflow settings can be calculated in advance using the Aerflux configurator, while the external adjustment lever allows quick, tool-free fine-tuning without needing to open the distribution box. This makes installation, commissioning, and future maintenance faster and far less fiddly — a small part that saves big headaches.

Thanks to its radial design, the AE34C delivers low system pressure loss, reducing fan energy consumption and keeping noise levels to a minimum. Airtight mechanical connections ensure reliable long-term performance and a clean, professional installation every time.

Key Features & Benefits

• Precise airflow control for each duct individually.
• Tool-free external adjustment for fast commissioning.
• Accessory for Air Excellent distribution boxes.
• Low pressure loss due to efficient radial design.
• Airtightness class D / ATC 2 up to ±2000 Pa.
• Helps minimise fan energy use and sound production.
• Compatible with all Air Excellent duct types using converters.
• Designed for use with semi-rigid ducts on a roll.
• TÜV SÜD and ISEGA tested and certified.
• REACH compliant for added peace of mind.

Ideal for residential and light commercial ventilation systems where accurate airflow balancing, efficiency, and ease of installation are non-negotiable — because ventilation should be set once and done right.