OSO Ecoline 210L Indirect Unvented Cylinder

The OSO Ecoline 210L indirect unvented cylinder delivers compact, high-quality hot water storage with advanced ECO foam insulation to reduce heat loss and ensure efficient energy use. Designed with a smooth dogleg coil for effective heat transfer, the Ecoline 210 provides reliable mains pressure hot water suitable for medium to large homes.

Key Features

• 210 litre capacity with a compact height for easy installation in airing cupboards.
• A-rated ErP energy efficiency with low standing heat loss thanks to ECO foam insulation technology.
• Dogleg smooth coil (approx. 0.8 m²) designed for fast and efficient heat transfer from boilers or heat sources.
• Factory fitted 3 kW immersion heater provides electric backup heating as standard.
• High-grade stainless steel tank offering durability and a 25-year anti-corrosion warranty.
• G3-compliant unvented controls including motorised valve, expansion vessel, temperature & pressure relief valve, and multibloc set.
• Compact dimensions: 580 mm diameter x 1310 mm height fit most UK airing cupboards and space restricted areas.

Why Buy the OSO Ecoline 210L?

The Ecoline 210 combines proven OSO Hotwater engineering with energy-saving insulation to offer affordable, reliable mains pressure hot water tailored for family homes and small blocks. Its compact size reduces installation challenges while maintaining powerful performance.

Backed by a comprehensive warranty and factory-fitted safety controls, the Ecoline 210 provides peace of mind and long-term savings for homeowners and installers.

Suitable For

• Medium to large homes with moderate to high hot water demand.
• System boilers and heat pump installations requiring indirect unvented cylinders with electric backup.
• New builds, renovations and refurbishments prioritising ErP A-rated products.
• Installations requiring compact cylinders for space optimisation.

Technical Specifications

• Brand: OSO Hotwater
• Model: Ecoline 210L Indirect Unvented Cylinder
• Type: Indirect unvented mains pressure hot water cylinder
• Capacity: 210 litres
• Energy Rating: A (ErP)
• Standing Heat Loss: Approximately 1.30 kWh/24hrs via ECO foam insulation
• Dimensions: Ø580 mm x 1310 mm height
• Weight: Approx. 40 kg empty / 210 kg full
• Primary Coil: Dogleg smooth scale-resistant coil approx. 0.8 m²
• Heat-up Time (coil ΔT 55°C): ~24 minutes
• Immersion Heater: 3 kW factory-fitted backup
• Max Operating Pressure: 6 bar
• Expansion Vessel Capacity: 12 litres
• Safety Controls: Temperature and pressure relief valves, motorised valve
• Tank Material: Duplex stainless steel with 25-year warranty

Installation & Compliance

Supplied ready with full G3 unvented control pack, factory testing and commissioning for straightforward professional installation ensuring compliance with UK Building Regulations.