# Check Valve ORNO BF-100/VALVE for Fans Ø100 mm

**URL:** https://aio.lv/en/product--orno-bf-100valve--11944810
**Data updated:** 2026-03-10 11:51 (EET)
**Category:** Ventilation Filters
**Manufacturer:** ORNO
**Manufacturer code:** BF-100/VALVE
**EAN:** 5908254818363
**Warranty:** 2 Years
**Availability:** Out of stock

## Summary description

ORNO BF-100/VALVE is a check (non-return) valve designed for ventilation fans with a 100 mm duct diameter. It prevents backflow of air when the fan is off and helps maintain proper airflow direction. Suitable for inline and wall-mounted fan installations, this valve is used in residential and light commercial ventilation systems to reduce drafts and prevent odor ingress.

## Long description

ORNO BF-100/VALVE is a check (non-return) valve engineered for ventilation fans with a 100 mm duct diameter. Designed to fit inline and wall-mounted fan installations, the valve prevents reverse airflow when the fan is switched off and helps maintain correct airflow direction in residential and light commercial ventilation systems. The compact design allows straightforward integration into standard 100 mm ductwork, reducing drafts and limiting odor ingress from connected ducts.
Advantages
The valve offers reliable one-way air flow control with low resistance during fan operation and effective closure when the fan is idle. Its construction ensures stable performance over repeated cycles and minimal impact on fan efficiency. Installation is simple and compatible with common 100 mm ventilation fittings, while the lightweight design reduces load on mounting points.
Suitable for
Bathroom and kitchen exhaust fans with 100 mm ducting
Inline duct ventilation systems to prevent backdrafts
Wall-mounted fan installations where odor or cold air ingress must be limited
Residential and light commercial ventilation applications
Key specifications
Duct diameter compatibility: 100 mm
Function: check (non-return) valve for airflow control
Installation type: inline or wall-mounted duct insertion
Material characteristics: lightweight construction suitable for standard ventilation use
Operational behavior: allows airflow in one direction and closes to prevent reverse flow
How to use
Insert the valve into a 100 mm duct segment in the correct orientation so that the flap opens toward the direction of intended exhaust flow. Secure the valve using appropriate duct clamps or mounting fittings to ensure an airtight connection. Verify that the valve moves freely and fully closes when the fan is off. Periodically inspect for dust or debris accumulation that could impede movement and clean as needed to maintain proper function.
Usage recommendations
For optimal performance, install the valve as close to the fan outlet as practical and ensure the duct run is as straight as possible with minimal bends. Avoid locations where heavy condensation or excessive grease may accumulate. Regular visual checks and occasional cleaning will extend reliable operation and help maintain airflow efficiency.

## FAQ

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All ORNO products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized ORNO service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

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