# ALNOR SPR-C-100-040-0300-NL Circular Duct Reducer

**URL:** https://aio.lv/en/product--alnor-spr-c-100-040-0300-nl--12504837
**Data updated:** 2026-06-10 09:29 (EEST)
**Category:** Ventilation Filters
**Manufacturer:** ALNOR
**Manufacturer code:** SPR-C-100-040-0300-NL
**EAN:** 5901829255037
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 48.49 €
**Prices and availability valid until:** 2026-08-17 23:59
**Price without VAT (21%):** 40.07 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--alnor-spr-c-100-040-0300-nl--12504837

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 24.07.2026 | free |
| Pickup points | 29.07.2026 | 1.79 EUR |
| Courier delivery to door | 29.07.2026 | 4.99 EUR |

## Summary description

The ALNOR SPR-C-100-040-0300-NL is a high-quality circular duct reducer designed for efficient airflow management in ventilation systems. This component allows for a seamless transition between different duct diameters, ensuring optimal pressure and system performance. Constructed for durability and easy installation, it is an essential part for professional HVAC ductwork configurations.

## Long description

The ALNOR SPR-C-100-040-0300-NL circular duct reducer is a precision-engineered component designed to facilitate smooth transitions between ventilation ducts of varying diameters. Manufactured by Alnor, this unit is built to maintain consistent airflow and pressure levels within HVAC systems, ensuring that your ventilation network operates at peak efficiency. Its robust construction and standardized design make it a reliable choice for both residential and commercial ductwork installations.
Advantages
This circular duct reducer is crafted from high-quality galvanized sheet metal, providing excellent resistance to corrosion and environmental wear. The galvanized coating ensures long-term durability, even in demanding ventilation environments. Its precise dimensions allow for a secure and airtight fit, which minimizes energy loss and prevents air leakage throughout the system. The lightweight yet sturdy design simplifies the installation process, allowing for quick integration into existing or new ductwork configurations.
Suitable for
Residential ventilation systems
Commercial HVAC ductwork
Air distribution and exhaust networks
Transitioning between different duct sizes in circular systems
When it may not be suitable
This component is specifically designed for circular ducting systems and is not compatible with rectangular or oval ductwork without the use of additional specialized adapters. It is also not intended for use in environments with highly corrosive gases or extreme temperatures that exceed the standard specifications for galvanized steel.
Key specifications
Material: Galvanized sheet
Coating: Galvanized
Diameter: 100 mm
Length: 3 m
How to use
To install the reducer, ensure that the ducting is clean and free of debris. Slide the reducer into the corresponding circular ducts, ensuring a snug fit. It is recommended to use appropriate sealing materials, such as duct tape or specialized sealant, to ensure the connection is airtight. Secure the joint with screws or rivets as required by local building codes to maintain structural integrity.
What to consider before purchase
Verify the diameter of your existing ductwork to ensure compatibility
Check the available space for the 3-meter length of the component
Ensure the galvanized material is suitable for your specific air quality and humidity conditions
Usage recommendations
For optimal system performance, regularly inspect all duct connections for signs of wear or air leaks. Ensure that the ductwork is properly supported along its entire length to prevent sagging or stress on the reducer joints.

## FAQ

### How much does the ALNOR SPR-C-100-040-0300-NL Circular Duct Reducer cost, and is it available for purchase?

The price is 48.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 359 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 24.07.2026 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/12504837/68845545_large.webp