# Expansion Tank DANFOSS Redan 12 L Rectangular 12L for Heating Systems

**URL:** https://aio.lv/en/product--danfoss-004u8237--11888108
**Data updated:** 2026-03-09 21:11 (EET)
**Category:** Heating Radiators
**Manufacturer:** DANFOSS
**Manufacturer code:** 004U8237
**EAN:** 5704748488735
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 163.49 €
**Prices and availability valid until:** 2026-07-18 23:59
**Price without VAT (21%):** 135.12 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--danfoss-004u8237--11888108

## 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 | 1.99 EUR |
| Courier delivery to door | 16.07.2026 | 4.99 EUR |

## Summary description

DANFOSS Redan 12 L rectangular expansion tank designed for closed heating systems. This 12-litre vessel provides pressure compensation and volume buffering to protect boilers, radiators and piping from thermal expansion. Suitable for domestic and light commercial installations where a compact rectangular 12L expansion vessel is required to maintain system stability and reduce pressure fluctuations.

## Long description

DANFOSS Redan 12 L rectangular expansion tank is designed for closed heating systems where compact, reliable pressure compensation and volume buffering are required. The 12-litre rectangular vessel accommodates thermal expansion of heating medium to reduce pressure fluctuations and protect boilers, radiators and piping from overpressure during temperature changes. Its form factor suits installations with limited depth and where a flat mounting profile is preferred.
Advantages
The rectangular design offers space-saving installation and simplified mounting in confined cabinet or wall-mounted locations. Built for closed heating systems, the tank delivers consistent pressure stabilization and reduces cycling of pumps and safety valves. Constructed according to heating industry standards, it provides a predictable expansion volume for domestic and light commercial systems and helps maintain system balance over seasonal temperature variations.
Suitable for
 Domestic central heating systems with closed-loop configuration
 Light commercial heating installations and small multi-family systems
 Retrofit projects where a compact, shallow expansion vessel is needed
 Installations with limited wall or cabinet depth requiring a rectangular profile
Key specifications
 Nominal volume: 12 litres of expansion capacity
 Rectangular, space-saving housing suitable for flat-mount locations
 Intended for closed heating systems to provide pressure compensation
 Protects boilers, radiators and piping from pressure increases due to thermal expansion
 Suitable for domestic and light commercial use with moderate system sizes
How to use
Install the expansion tank on the return or another recommended connection point of the heating circuit following local plumbing and heating codes. Ensure the vessel is mounted securely on a suitable bracket or surface and that pipe connections are leak-free. Pre-charge the tank to the manufacturer-recommended air pressure for the specific system static pressure before final commissioning. During initial fill and subsequent maintenance, monitor system pressure and adjust pre-charge if necessary to maintain correct operating range and avoid excessive cycling.
Usage recommendations
Verify compatibility with system maximum working pressure and follow local regulations for closed heating systems. Check pre-charge periodically, especially after large service interventions or system draining, and inspect connections for corrosion or leaks to ensure long-term performance.

## FAQ

### How much does the DANFOSS Redan Expansion Tank 12L cost, and is it available for purchase?

The price is 163.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 1 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, Installment. All transactions are 100% secure and encrypted.

### Can DANFOSS Redan Expansion Tank 12L 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 DANFOSS 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 DANFOSS 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/11888108/67309268_large.webp