# Round duct reducer AWENTA 125 x 100 mm KO125-29, metal ventilation fitting

**URL:** https://aio.lv/en/product--awenta-a-ko125-29--11833490
**Data updated:** 2026-03-09 14:45 (EET)
**Category:** Ventilation Filters
**Manufacturer:** AWENTA
**Manufacturer code:** A-KO125-29
**EAN:** 5905033296022
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 5.99 €
**Prices and availability valid until:** 2026-07-24 23:59
**Price without VAT (21%):** 4.95 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--awenta-a-ko125-29--11833490

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 13.07.2026 | free |
| Pickup points | 16.07.2026 | 1.89 EUR |
| Courier delivery to door | 16.07.2026 | 4.99 EUR |

## Summary description

Round duct reducer by AWENTA, model KO125-29, with dimensions 125 x 100 mm. Designed to connect circular ventilation ducts of different diameters, this metal fitting ensures stable airflow transition and tight joint between 125 mm and 100 mm ducts. Suitable for ventilation, exhaust, and HVAC installations in residential and commercial settings.

## Long description

Round duct reducer AWENTA 125 x 100 mm KO125-29 is a metal ventilation fitting designed to join two circular ducts of different diameters. The fitting provides a smooth transition between a 125 mm duct and a 100 mm duct, supporting continuous airflow with a compact, rigid connection that is suitable for ductwork in HVAC, exhaust and ventilation systems in both residential and commercial installations.
Advantages
The metal construction offers dimensional stability and resistance to deformation, ensuring a reliable seal and long service life under typical ventilation conditions. The tapered geometry promotes reduced turbulence at the transition point, helping to maintain airflow efficiency and lower pressure loss compared with abrupt junctions. The simple shape and standard diameters make the reducer compatible with common circular duct systems and straightforward to integrate into existing ductwork.
Suitable for
Connecting 125 mm and 100 mm circular ventilation ducts
Residential ventilation and bathroom or kitchen exhaust fans
Small commercial HVAC branch reductions and duct modifications
Retrofit projects where diameter reduction is required
Key specifications
Material: metal
Connection type: circular duct reducer (concentric taper)
Inlet diameter: 125 mm
Outlet diameter: 100 mm
Application: ventilation, exhaust and HVAC ductwork
How to use
Position the reducer so the larger end aligns with the 125 mm duct and the smaller end aligns with the 100 mm duct, ensuring correct orientation for airflow direction. Slide the duct ends onto the reducer until fully seated and secure the joints with appropriate clamps, pop rivets, or self-tapping screws depending on the duct material. Seal the connection using HVAC foil tape or approved duct sealant to prevent air leaks and maintain system efficiency. Verify alignment and clearances before final fastening to avoid stress on adjacent duct sections.
Usage recommendations
For best performance, minimize the number of consecutive reducers and maintain smooth, gradual transitions in the duct system. Regularly inspect joints for corrosion or loosened fasteners in environments with high humidity or aggressive air. Use corrosion-resistant fastening and sealing materials when installing in wet or coastal locations.

## FAQ

### How much does the AWENTA KO125-29 round duct reducer 125x100 mm 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 — 12 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 13.07.2026 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 AWENTA 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 AWENTA 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/11833490/67233992_large.webp