# Flue concentric extension 60/100 Vaillant 303802

**URL:** https://aio.lv/en/product--vaillant-303802--11827323
**Data updated:** 2026-03-09 11:17 (EET)
**Category:** Home Appliance Accessories
**Manufacturer:** Vaillant
**Manufacturer code:** 303802
**EAN:** 4024074365762
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 85.49 €
**Prices and availability valid until:** 2026-08-02 23:59
**Price without VAT (21%):** 70.65 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--vaillant-303802--11827323

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 21.07.2026 | free |
| Pickup points | 24.07.2026 | 1.89 EUR |
| Courier delivery to door | 24.07.2026 | 4.99 EUR |

## Summary description

Concentric flue extension 60/100 by Vaillant (model 303802). Designed to extend the concentric flue system with 60 mm inner and 100 mm outer diameters. Suitable for use with compatible Vaillant boilers and venting systems to adjust flue length and routing. Provides a sealed concentric connection for exhaust and air intake in residential installations.

## Long description

Concentric flue extension 60/100 Vaillant 303802 is a purpose-built accessory for expanding concentric flue runs on compatible Vaillant boilers and venting systems. The product maintains a sealed concentric pathway with a 60 mm inner pipe for exhaust gases and a 100 mm outer pipe for combustion air intake, allowing installers to adjust flue length and routing while preserving safe separation of airflow. It is intended for residential installations where additional length or a change in terminal position is required.
Advantages
The concentric design keeps exhaust and intake channels integrated within a single assembly, simplifying installation and reducing the number of separate connections. Constructed to match the dimensions of standard 60/100 systems, the extension provides a secure, sealed joint that helps maintain proper draft and prevents leakage of combustion products. Using a manufacturer-compatible extension helps ensure system conformity and reduces the need for custom adapters.
Suitable for
 Extending the flue run of compatible Vaillant boilers
 Adjusting terminal position to suit site constraints
 Residential boiler installations requiring concentric flue extension
 Installation where maintaining sealed intake and exhaust separation is required
Key specifications
 Concentric diameter: inner 60 mm / outer 100 mm
 Designed for use with compatible concentric venting systems
 Material and finish matched to Vaillant concentric components
 Provides sealed connection for simultaneous exhaust and air intake
How to use
Fit the concentric extension between the boiler outlet and the existing flue run, ensuring alignment of inner and outer pipes. Follow the boiler manufacturer’s installation instructions for sealing and securing the joint, including any required clamps or seals. Verify that the assembled run meets minimum clearances and routing guidelines, and perform a pressure and combustion gas check after installation to confirm correct operation and absence of leaks.
Usage recommendations
Use only with compatible Vaillant appliances and concentric components. Have a qualified heating engineer install and test the flue extension to ensure compliance with local regulations and safe operation.

## FAQ

### How much does the Concentric flue extension 60/100 Vaillant 303802 cost, and is it available for purchase?

The price is 85.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 6 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 21.07.2026 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, Installment. All transactions are 100% secure and encrypted.

### Can Concentric flue extension 60/100 Vaillant 303802 be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### 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 Vaillant 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 Vaillant 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/11827323/67228585_large.webp