OSO Ecoline 150L Indirect Unvented Cylinder | Affordable High-Performance A-Rated Hot Water Storage

The OSO Ecoline 150L indirect unvented cylinder offers exceptional value with high-grade stainless steel construction and advanced ECO foam insulation for low heat loss and fast recovery times. This cost-effective A-rated solution delivers reliable mains pressure hot water perfect for budget-conscious installations.

Key Features

• 150 litre indirect capacity suitable for small to medium households with 1 bathroom.
• Ultra-low heat loss insulation using latest generation ECO foam for energy efficiency and reduced bills.
• Factory-fitted 3 kW immersion heater provides reliable electric backup heating.
• Smooth scale-resistant primary coil (0.8 m²) ensures efficient heat transfer and long life in hard water areas.
• Complete G3 fittings pack including expansion vessel, T&P relief valve, motorised valve and drain cock.
• Compact dimensions: 580 mm diameter x 1600 mm height fits standard airing cupboards.
• Digital thermostat with safety cut-out maintains precise temperature control (40-70°C preset 60°C).
• Lightweight duplex stainless steel tank with 25-year anti-corrosion warranty.

Why Buy the OSO Ecoline 150L?

Combining OSO's renowned quality engineering with competitive pricing, the Ecoline series delivers professional performance without premium cost, making it ideal for housebuilders, landlords and homeowners seeking reliable unvented hot water.

With superior heat-up performance, low standing losses and full factory commissioning, this cylinder minimises installation time while maximising long-term energy savings and system reliability.

Suitable For

• Small family homes and flats (2-3 bedrooms) with moderate hot water demand.
• System boilers and regular boilers requiring indirect unvented storage with backup heating.
• Budget new builds and social housing projects needing compliant, efficient cylinders.
• Replacement installations upgrading from vented systems or failed cylinders.

Technical Specifications

• Brand: OSO Hotwater
• Model: Ecoline Indirect 150L
• Type: Indirect unvented mains pressure hot water cylinder
• Capacity: 150 litres
• Energy Rating: A (ErP)
• Standing Heat Loss: 1.30 kWh/24hrs
• Dimensions: Ø580 mm x 1600 mm height
• Weight: 38 kg empty / 181 kg full
• Primary Coil: 0.8 m² smooth scale-resistant
• Heat-up Time: 24.3 minutes (coil ΔT 55°C)
• Recovery Time: 17.2 minutes (70% ΔT 55°C)
• Immersion Heater: 3 kW factory-fitted (1 x 240V)
• Max Operating Pressure: 6 bar domestic / 3 bar primary
• Expansion Vessel: 12 litres
• Safety Valve: 90-95°C / 10 bar T&P relief
• Tank Material: Duplex stainless steel (ULTRAWELD)
• Warranty: 25 years tank / 2 years components

Installation & Compliance

Supplied as a fully flooded, factory-tested unit with complete G3 kit including motorised valve, multibloc valves, expansion vessel and all pipework fittings for rapid professional installation by qualified engineers.