Gledhill PROIN250H 550mm 250L Pro Horizontal Indirect Unvented Hot Water Cylinder

The Gledhill PROIN250H is a 250L (nominal) horizontal indirect unvented stainless steel hot water cylinder designed for installations where vertical models won’t fit, such as lofts or under stairs. Manufactured in the UK from duplex stainless steel with 50mm HCFC-free EnviroFoam insulation, it provides reliable mains-pressure hot water for showers and baths without a boost pump.

Suitable for domestic properties and compatible with gas or oil boilers, this trade-quality cylinder suits installers and homeowners seeking a space-saving solution for new builds or replacements. It includes a high-efficiency corrugated coil for rapid heat transfer and a 3kW immersion heater for backup.

Key Features

• Horizontal orientation for height-restricted areas
• 244 litre actual capacity
• 50mm EnviroFoam insulation for low heat loss
• High-efficiency corrugated primary coil
• 3kW incoloy immersion heater
• 25 year warranty (subject to registration)
• ErP rating C
• Secondary return connection
• Duplex stainless steel construction
• UK manufactured

Benefits

• ✔ Fits where vertical cylinders cannot
• ✔ Delivers high-flow mains pressure hot water
• ✔ Reduces energy bills with excellent insulation
• ✔ Compatible with gas and oil boilers
• ✔ Provides backup heating via immersion
• ✔ Long-term reliability with 25-year warranty
• ✔ Quick heat-up time of around 36 minutes
• ✔ Corrosion resistant for longevity
• ✔ Ideal for trade installers and DIY-savvy homeowners

Technical Specifications

• MPN: PROIN250H
• Capacity: 244 litres
• Diameter: 550 mm
• Height: 585 mm
• Width: 1744 mm
• Empty weight: 35 kg
• Full weight: 279 kg
• Heat loss: 86 W
• ErP rating: C
• Immersion heater: 3 kW
• Primary coil rating: 20.3 kW
• Material: Duplex stainless steel
• Insulation: 50 mm EnviroFoam
• Orientation: Horizontal
• System: Unvented indirect

What’s in the Box?

1 x Gledhill PROIN250H cylinder, 1 x 3kW immersion heater, combination valve, pressure & temperature relief valve, control & overheat thermostats.