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

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.