Galvanized metal reducer | FI connector 355/315 mm

355/315 mm Symmetrical Reducer – Galvanized Ventilation Reducer

The RED-355/315 symmetrical reducer is a metal ventilation fitting designed to create a transition between ducts with diameters of 355 mm and 315 mm. It allows for a simple change in the system’s diameter while maintaining the duct’s central alignment.

The reducer features nipple ends that slide directly into compatible ducts. This design simplifies installation and ensures a stable connection in the ventilation system.

355 to 315 mm Ventilation Duct Reducer

The RED-355/315 model allows you to connect a larger 355 mm ventilation duct to a 315 mm diameter duct. It can be used during the construction of new systems, as well as when modernizing existing systems and adapting equipment with connectors of different diameters.

The symmetrical design ensures that the smaller and larger sections of the reducer are aligned on a single axis. This facilitates the installation of straight sections without the need to shift the duct’s axis.

Galvanized steel – durable construction

The 355/315 mm ventilation reducer is made of galvanized steel sheet. The zinc coating protects the steel surface from corrosion and increases the component’s durability during operation in ventilation systems.

The metal construction ensures adequate rigidity, making the reducer suitable for both residential installations and more complex ventilation systems.

Applications of the 355/315 mm reducer

The reducer can be used in many types of installations, including:

• mechanical ventilation systems,
• ventilation systems for grow rooms,
• air conditioning systems,
• heat recovery systems,
• systems using Spiro-type ducts,
• systems with Flex and Termoflex ducts,
• residential and industrial air exchange systems.

It can also be used to adapt the diameter of a fan, carbon filter, or ventilation duct if individual system components have different connection diameters.

Key features of the RED-355/315 reducer

• transition from 355 mm to 315 mm,
• symmetrical reducer design,
• nipple ends for installation inside the duct,
• made of galvanized steel sheet,
• rigid and durable construction,
• surface protection against corrosion,
• easy installation,
• for ventilation, air conditioning, and heat recovery,
• compatible with Spiro, Flex, and Termoflex ducts.

Technical Specifications

FAQ – 355/315 mm ventilation reducer

What is the 355/315 mm reducer used for?

The reducer allows you to connect a 355 mm ventilation duct to a 315 mm duct. It is used wherever a change in the system’s diameter is necessary.

Does the 355/315 reducer fit Spiro ducts?

Yes, it can be used with compatible Spiro-type ventilation ducts of the appropriate diameters.

What does a spigot end mean?

A spigot end means that the end of the reducer is designed to be inserted into a compatible duct or system component.

What material is the reducer made of?

The RED-355/315 is made of galvanized steel sheet, which ensures structural rigidity and increased surface corrosion resistance.

Can the reducer be used in a grow box system?

Yes. The reducer can be used in ventilation systems for grow boxes and grow rooms, e.g., when a fan, carbon filter, or duct has different connection diameters.

Is the reducer symmetrical?

Yes. It is a symmetrical reducer, which is why the 355 mm and 315 mm ports are centered relative to each other on a single axis.