# Round Duct Adapter AWENTA KO120-29 fi125/120mm – transition 125mm to 120mm

**URL:** https://aio.lv/en/product--awenta-ko120-29--12114703
**Data updated:** 2026-03-20 10:07 (EET)
**Category:** Ventilation Filters
**Manufacturer:** AWENTA
**Manufacturer code:** KO120-29
**EAN:** 5905033296251
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 6.49 €
**Prices and availability valid until:** 2026-07-26 23:59
**Price without VAT (21%):** 5.36 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--awenta-ko120-29--12114703

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 14.07.2026 | free |
| Pickup points | 17.07.2026 | 1.89 EUR |
| Courier delivery to door | 17.07.2026 | 4.99 EUR |

## Summary description

AWENTA KO120-29 is a round duct adapter designed for ventilation systems to connect fi125mm ducting to fi120mm components. The metal reducer provides a secure transition between different circular duct diameters, suitable for air extraction and supply installations in residential and light commercial spaces. It is used where precise diameter matching is required for fans, grilles or pipes.

## Long description

AWENTA KO120-29 round duct adapter provides a precise and reliable metal transition from 125 mm to 120 mm circular ducting. Designed for ventilation installations, the reducer ensures firm mechanical connection between ducts, fans, grilles and other circular components where a small diameter change is required. The adapter is intended for use in residential and light commercial air extraction and supply systems and helps maintain airflow continuity across mismatched fittings.
Advantages
The AWENTA metal adapter offers a tight fit and stable mechanical connection that reduces air leakage at the joint. Its rigid construction supports easy insertion and alignment of circular ducts and ventilation components. The simple geometry and smooth inner surface help preserve airflow characteristics and reduce turbulence at the transition. Installation and removal are straightforward, which speeds up maintenance and system modification tasks.
Suitable for
 Connecting 125 mm circular ducts to 120 mm fans or grilles
 Residential kitchen or bathroom extraction systems
 Light commercial ventilation and HVAC retrofit projects
 Temporary or permanent ductwork adjustments requiring a small diameter reduction
Key specifications
 Type: round duct reducer / adapter for circular ventilation ducts
 Inlet diameter: 125 mm (outer/nominal duct size)
 Outlet diameter: 120 mm (outer/nominal duct size)
 Material: metal construction suitable for ventilation use
 Shape: straight concentric transition between diameters
How to use
Measure and confirm the external diameters of the ducting and component to ensure compatibility with the 125 mm to 120 mm transition. Insert the larger end onto the 125 mm duct or sleeve and the smaller end onto the 120 mm component, aligning the adapter concentrically. Secure joints with appropriate clamps, screws or sealing tape as required by the installation practice to prevent air leakage. Verify that the connection is mechanically stable and does not obstruct airflow before restoring system operation.
Usage recommendations
For best results, use corrosion-resistant clamps or fasteners and apply duct sealing tape or mastic to reduce leakage. If the system includes flexible ducting, ensure the adapter is supported to avoid sagging or stress on the connection. Check local ventilation codes and manufacturer instructions for compatible mounting and sealing methods.

## FAQ

### How much does the Round Duct Adapter AWENTA KO120-29 cost, and is it available for purchase?

The price is 6.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 5 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 14.07.2026 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/12114703/67649970_large.webp