Ideal 300 Litre Indirect Unvented Horizontal Hot Water Cylinder – Stainless Steel | 25 Year Warranty UK

The Ideal 300 Litre Indirect Unvented Horizontal Hot Water Cylinder is the perfect solution for homes with a boiler looking for reliable, high-pressure hot water performance.

Designed as an indirect unvented cylinder, it works with your existing boiler to heat water efficiently via an internal coil—delivering fast recovery times and consistent hot water throughout your home.

With its horizontal design, it is ideal for installation in lofts or areas with limited height, making it suitable for large properties with restricted vertical space.

With its unvented design, you’ll benefit from strong mains pressure, giving you powerful showers and the ability to run multiple taps at once without loss of performance.

Manufactured from premium stainless steel, this cylinder is built to last, offering excellent resistance to corrosion and superior heat retention—helping reduce energy usage and running costs over time.

The 300 litre capacity makes it ideal for large homes or commercial applications, ensuring high-volume hot water supply.

Backed by a 25-year manufacturer warranty, this Ideal cylinder offers long-term peace of mind and is trusted by installers across the UK.

Why Buy This Cylinder?

✔ Designed for homes with a boiler
✔ Horizontal design – ideal for loft installations
✔ Strong mains pressure for powerful showers
✔ Fast heat recovery via internal coil
✔ Energy-efficient insulation – lower bills
✔ Durable stainless steel construction
✔ Backed by a 25-year warranty

Key Features

• 300 litre capacity – ideal for very large homes or commercial use
• Indirect heated – requires boiler connection
• Unvented system – mains pressure hot water
• Horizontal design for loft or restricted spaces
• High-quality stainless steel construction
• Excellent thermal insulation
• 25-year cylinder warranty

Delivery & Availability

UK Wide Delivery
In Stock – Fast Dispatch
Expert Support Available

Quick FAQ

Do I need a boiler for this cylinder?
Yes – this is an indirect cylinder, so it must be connected to a boiler.

Can this be installed in a loft?
Yes – the horizontal design makes it ideal for loft or low-height installations.

Will I get good water pressure?
Yes – the unvented system provides strong mains pressure hot water.

Is 300L enough for my home?
Ideal for large homes (5+ bedrooms) or commercial properties with high demand.

Other Sizes Available

 180L | 210L | 250L

Also Available In Vertical 

90L | 120L | 150L | 180L |210L | 250L |300L