Baxi Indirect Unvented Cylinder

Baxi Indirect Unvented Cylinder

The Baxi Indirect Unvented Cylinder is designed to deliver reliable, high-performance hot water for modern high-pressure heating systems. With an internal expansion system and a high-performance coil-in-coil heat exchanger, it combines practical installation features with efficient hot water recovery. The range is available in 145L, 170L, 210L, 250L and 300L capacities, giving you flexibility to choose a cylinder size that matches the hot water requirements of your property. Whether you need a more compact 145L cylinder or greater storage for a higher-demand household, there is an option within the range to suit.

Space-Saving Internal Expansion

An internal floating baffle expansion system removes the need for a separate expansion vessel. This gives the cylinder a neat appearance while helping to save installation space and reduce fitting time. The insulated temperature and pressure (T&P) valve and 50mm-thick cylinder insulation help retain heat within the cylinder. This can improve energy efficiency while keeping stored hot water at a useful temperature for longer.

Fast Hot Water Recovery

The Baxi Indirect Unvented Cylinder features a high-performance coil-in-coil heat exchanger, designed to provide exceptionally fast recovery times. This helps the cylinder replenish its hot water supply efficiently after periods of heavy use. The cylinder can deliver up to 76 litres of hot water per minute at 3 bar pressure, providing strong flow performance for showers, baths and other household applications without the need for additional shower pumps or cold water storage tanks.

Durable Duplex Stainless Steel Construction

Built using high-grade duplex stainless steel, the cylinder offers excellent corrosion resistance alongside a strong strength-to-weight ratio. This robust construction is designed to provide dependable performance and long-term durability. The cylinder is designed for high-pressure systems only, with a maximum operating pressure of 16 bar.

Available Capacities

The Baxi Indirect Unvented Cylinder is available in the following capacities:

• 145L – a compact option for households with more moderate hot water requirements.
• 170L – provides additional storage while maintaining a practical size.
• 210L – suitable for homes requiring a larger store of hot water.
• 250L – offers substantial capacity for higher-demand households.
• 300L – the largest option in the range, designed for properties with particularly high hot water demand.

Key Features

• Indirect unvented hot water cylinder
• Available in 145L, 170L, 210L, 250L and 300L capacities
• Internal floating baffle expansion system
• No separate expansion vessel required
• High-performance coil-in-coil heat exchanger
• Designed for exceptionally fast hot water recovery
• Up to 76L/min flow rate at 3 bar pressure
• 50mm-thick cylinder insulation
• Insulated T&P valve
• High-grade duplex stainless steel construction
• High corrosion resistance
• Maximum operating pressure of 16 bar
• 22mm compression connections
• Suitable for high-pressure systems only
• ErP rating: C
• 15-year manufacturer's guarantee when registered, subject to terms and conditions
• 2-year standard warranty

Technical Specifications

• Brand: Baxi
• Type: Indirect unvented cylinder
• Capacities: 145L, 170L, 210L, 250L and 300L
• Material: Duplex stainless steel
• Coil type: Coil-in-coil heat exchanger
• Expansion system: Internal floating baffle
• Expansion vessel: Not required
• Flow rate: Up to 76L/min at 3 bar
• Maximum operating pressure: 16 bar
• Connection size: 22mm compression
• Standard dimensions: 553mm wide and 553mm deep; height varies by capacity
• ErP rating: C

Frequently Asked Questions

What capacities are available for the Baxi Indirect Unvented Cylinder?

The range is available in 145L, 170L, 210L, 250L and 300L capacities, allowing the cylinder to be matched to different household hot water requirements.

Does this Baxi cylinder need a separate expansion vessel?

No. The cylinder uses an internal floating baffle expansion system, so a separate expansion vessel is not required. This helps save space and can make installation more straightforward.

What is the maximum hot water flow rate?

The cylinder can deliver up to 76 litres per minute at 3 bar pressure, providing strong hot water flow for domestic applications without requiring additional shower pumps or cold water storage tanks.

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