# Air return damper ALNOR DAOS-125, model DAOS-125

**URL:** https://aio.lv/en/product--alnor-daos-125--4907252
**Data updated:** 2026-03-07 15:04 (EET)
**Category:** Ventilation Filters
**Manufacturer:** ALNOR
**Manufacturer code:** DAOS-125
**EAN:** 4772013178040
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 5.99 €
**Prices and availability valid until:** 2026-07-19 23:59
**Price without VAT (21%):** 4.95 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--alnor-daos-125--4907252

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 01.07.2026 | free |
| Pickup points | 06.07.2026 | 1.99 EUR |
| Courier delivery to door | 06.07.2026 | 4.99 EUR |

## Summary description

ALNOR DAOS-125 return damper for ventilation systems. Designed to control and regulate airflow in return ducts, the DAOS-125 provides adjustable air passage for balancing ventilation circuits and preventing backflow. Suitable for commercial and residential HVAC installations where a compact damper for a 125 mm connection is required.

## Long description

ALNOR DAOS-125 is a compact air return damper designed for ventilation and HVAC systems with a 125 mm duct connection. The DAOS-125 controls and regulates airflow in return ducts, allowing adjustable air passage to balance ventilation circuits and prevent backflow. Its compact circular design makes it suitable for installations where space is limited and a reliable return air control element is required.
Advantages
The ALNOR DAOS-125 provides stable airflow regulation with an adjustable blade mechanism that enables fine tuning of return air volume. The device helps prevent unwanted backflow, contributing to improved system stability and energy efficiency. Its round profile and standard connection size simplify integration into existing ductwork, and the construction is intended for durable operation in commercial and residential ventilation applications.
Suitable for
 Balancing return airflow in small to medium ventilation circuits
 Preventing backflow in residential HVAC systems
 Use in compact commercial ventilation installations
 Integration into circular ducts with a 125 mm diameter connection
Key specifications
 Connection diameter: 125 mm
 Type: return (backdraft) damper with adjustable blade
 Application: ventilation and HVAC return ducts
 Shape: circular
 Installation: inline duct mounting for return air circuits
How to use
Install the DAOS-125 directly into the return duct with matching 125 mm connections, ensuring secure sealing at the joints to avoid leakage. Adjust the blade position to set the desired return airflow; fine tuning can be performed while the system is running to achieve balanced air distribution. Periodically inspect the damper for free blade movement and clean any accumulated dust to maintain performance.
Usage recommendations
Use the damper in conjunction with other airflow control and measurement devices for accurate balancing. Avoid exposure to corrosive atmospheres or temperatures beyond the ventilation system design limits. Schedule routine inspections and cleaning to ensure consistent operation and to prevent obstruction of the blade mechanism.

## Specifications

| Feature | Value |
|---|---|
| Weight | 0.228 kg |

## FAQ

### How much does the Return damper ALNOR DAOS-125 cost, and is it available for purchase?

The price is 5.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 120 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 01.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. 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 ALNOR 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 ALNOR 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

https://aio.lv/img/cache/product/4907252/30576278_large.webp