GERHMAN GLOBAL / PRODUCT COLLECTION
NRD61 – back draft damper
ENGINEERED FOR YOUR PROJECT
Product at a glance
NRD61 – back draft damper is intended for reverse-airflow prevention. Review the technical documents to confirm size, duty and installation options.
PRODUCT OVERVIEW
For projects involving reverse-airflow prevention, NRD61 – back draft damper offers a defined product option within the overflow units range. Final duties and accessories should be checked before ordering.
Application and product scope
The back draft damper is listed under Overflow units. It can be evaluated where its documented configuration matches the system layout, operating conditions and room or duct interface.
Supported product details
- Circular configuration for compatible round-duct or terminal layouts.
- Galvanised steel construction is referenced in the source documentation.
- Aluminium is referenced among the product construction details.
- Source documentation references EN1752; confirm the applicable classification and test scope before specification.
Selection and coordination
Selection should account for airflow duty, pressure conditions, system geometry and the available installation space. Check access needs, control interfaces and compatible accessories before the product schedule is released.
Technical documentation
The final submittal should identify the complete product reference and every selected option. Verify drawings, performance data and installation notes in the accompanying technical documents.
DOCUMENT CENTRE
Technical downloads
Access the latest locally stored product literature. Verify revision and technical data before specification.