# ALNOR DAOS-100 Return Damper

**URL:** https://aio.lv/en/product--alnor-daos-100--4907251
**Data updated:** 2026-06-10 09:32 (EEST)
**Category:** Ventilation Filters
**Manufacturer:** ALNOR
**Manufacturer code:** DAOS-100
**EAN:** 4772013178033
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 5.99 €
**Prices and availability valid until:** 2026-07-20 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-100--4907251

## 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 | 1.89 EUR |
| Courier delivery to door | 06.07.2026 | 4.99 EUR |

## Summary description

The ALNOR DAOS-100 is a high-quality return damper designed for ventilation systems. It effectively regulates airflow and prevents backflow in ductwork, ensuring optimal system performance. This durable damper is suitable for various residential and commercial HVAC applications, providing reliable operation and easy integration into standard ventilation setups.

## Long description

The ALNOR DAOS-100 return damper is a precision-engineered component designed to manage airflow within ventilation and HVAC systems. This device serves as a critical element for maintaining pressure balance and preventing unwanted backflow in ductwork, thereby enhancing the overall efficiency and longevity of your ventilation setup. Constructed from high-quality materials, the DAOS-100 offers robust performance and reliable operation in diverse environments.
Advantages
The primary benefit of the ALNOR DAOS-100 is its ability to provide consistent airflow regulation, which is essential for maintaining indoor air quality and system efficiency. Its design facilitates seamless integration into standard circular duct systems, reducing installation time and complexity. Furthermore, the durable construction ensures that the damper remains functional over extended periods, minimizing the need for frequent maintenance or replacement in demanding HVAC applications.
Suitable for
Residential ventilation systems
Commercial HVAC installations
Airflow control in supply and exhaust ducts
Preventing backdrafts in ventilation networks
When it may not be suitable
This damper is not intended for use in environments with highly corrosive gases or extreme temperatures that exceed the manufacturer's specified operating range. It is also not suitable for applications requiring motorized or automated airflow control, as this is a passive mechanical device.
Key specifications
Type: Return damper
Compatibility: Standard circular ductwork
Material: Galvanized steel
Function: Backflow prevention and airflow regulation
How to use
The ALNOR DAOS-100 should be installed directly into the ductwork at the designated point of airflow control. Ensure that the damper is oriented correctly according to the intended direction of airflow to allow the blades to open and close as required. Secure the unit firmly within the duct using appropriate fasteners and seal the connections with duct tape or sealant to prevent air leakage, ensuring the system remains airtight.
What to consider before purchase
Verify the diameter of your existing ductwork to ensure compatibility with the 100mm size.
Check the airflow requirements of your specific ventilation system.
Ensure the installation location allows for future access if inspection is required.
Usage recommendations
For optimal performance, inspect the damper blades periodically to ensure they are free from dust accumulation or debris that could impede movement. Proper installation is critical to prevent noise caused by vibration or loose connections.

## Specifications

| Feature | Value |
|---|---|
| Weight | 0.181 kg |

## FAQ

### How much does the Return Damper ALNOR DAOS-100 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 — 74 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/4907251/30576277_large.webp