# ALNOR NSL-125 Ventilation Sleeve with Gasket

**URL:** https://aio.lv/en/product--alnor-nsl-125--4907169
**Data updated:** 2026-06-10 09:32 (EEST)
**Category:** Ventilation Filters
**Manufacturer:** ALNOR
**Manufacturer code:** NSL-125
**EAN:** 4770364140167
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 3.99 €
**Prices and availability valid until:** 2026-07-20 23:59
**Price without VAT (21%):** 3.30 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--alnor-nsl-125--4907169

## 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

The ALNOR NSL-125 is a high-quality ventilation sleeve designed for connecting circular air ducts. Equipped with a rubber gasket, it ensures an airtight seal, preventing air leakage and improving the efficiency of HVAC systems. This durable component is essential for reliable ventilation installations, providing a secure fit and easy assembly in various residential and commercial ducting configurations.

## Long description

The ALNOR NSL-125 Ventilation Sleeve with Gasket is a professional-grade component engineered for the secure connection of circular ventilation ducts. Designed to maintain system integrity, this sleeve features an integrated rubber gasket that provides a reliable, airtight seal. By minimizing air leakage, it significantly enhances the overall efficiency and performance of HVAC systems in both residential and commercial environments.
Advantages
The primary benefit of the ALNOR NSL-125 is its robust construction, which ensures long-term durability and resistance to mechanical stress within ductwork systems. The inclusion of a high-quality rubber gasket simplifies the installation process by eliminating the need for additional sealants, while simultaneously ensuring that the connection remains airtight under various pressure conditions. This sleeve facilitates a precise fit, reducing turbulence and noise within the ventilation network, which contributes to a more stable and quiet operation of the entire system.
Suitable for
Connecting circular ventilation ducts in residential buildings
Commercial HVAC system installations
Upgrading or repairing existing air distribution networks
Industrial ventilation projects requiring airtight connections
When it may not be suitable
This sleeve is specifically designed for standard circular ducting systems and may not be compatible with non-standard duct shapes or specialized high-temperature industrial exhaust systems that require specific fire-rated or chemical-resistant materials. It is not intended for use in pressurized liquid piping systems.
Key specifications
Diameter: 125 mm
Material: Galvanized steel
Seal type: Integrated rubber gasket
Compatibility: Standard circular ventilation ducts
How to use
To install the ALNOR NSL-125, ensure that the ends of the circular ducts are clean and free of debris. Insert the sleeve into the duct ends until the central stop is reached. The integrated rubber gasket will compress against the inner wall of the duct, creating an airtight seal. Secure the connection using appropriate fasteners such as self-tapping screws or rivets to ensure the sleeve remains firmly in place during system operation.
What to consider before purchase
Verify the diameter of your existing ductwork to ensure compatibility with the 125 mm sleeve
Check the material compatibility with your current ventilation system
Ensure you have the necessary tools for securing the connection
Usage recommendations: For optimal performance, always ensure that the ducts are cut squarely and deburred before insertion. Regularly inspect the connections during routine maintenance to ensure the integrity of the seal remains intact over time.

## Specifications

| Feature | Value |
|---|---|
| Weight | 0.17 kg |

## FAQ

### How much does the ALNOR NSL-125 Ventilation Sleeve cost, and is it available for purchase?

The price is 3.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 750 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/4907169/30576195_large.webp