Gledhill PROIN180H 180L Pro Horizontal Indirect Unvented Hot Water Cylinder

The Gledhill PROIN180H is a horizontal indirect unvented hot water cylinder from the Stainless Pro range, purpose-designed for installations where vertical cylinders will not fit. Manufactured in the UK from highly corrosion-resistant duplex stainless steel with 50mm HCFC-free EnviroFoam insulation, it delivers efficient mains-pressure hot water for showers and baths without a boost pump.

Suitable for domestic use with gas or oil boilers in open-vented or sealed primary systems, this 180L (172L actual capacity) model offers a compact 585mm height, 550mm diameter and 1306mm length. It includes a high-efficiency corrugated coil, 3kW Incoloy immersion heater and full G3 kit components for straightforward installation by qualified engineers.

Key Features

• Horizontal design for height-restricted spaces such as lofts or under stairs
• Manufactured from highly corrosion-resistant duplex stainless steel
• 50mm HCFC-free EnviroFoam insulation for low heat loss
• High-efficiency corrugated primary coil maximises heat transfer
• 3kW Incoloy immersion heater for backup heating
• Delivers mains-pressure hot water for high-flow showers and baths
• ErP rating C with 78W heat loss
• 25-year warranty on the cylinder
• Compatible with gas and oil boilers
• UK manufactured

Benefits

• ✔ Ideal solution where ceiling height prevents vertical cylinder installation
• ✔ Provides reliable mains-pressure hot water performance
• ✔ Reduces energy bills with excellent insulation
• ✔ Long-term durability from duplex stainless steel construction
• ✔ Quick heat-up and recovery times
• ✔ Includes immersion heater and key safety controls
• ✔ 25-year warranty for peace of mind
• ✔ Suitable for both new-build and replacement projects
• ✔ High flow rates without additional pumps

Technical Specifications

• MPN: PROIN180H
• Capacity: 172 litres (nominal 180L)
• Orientation: Horizontal
• Diameter: 550mm
• Height: 585mm
• Length/Width: 1306mm
• Weight empty: 29kg
• Weight full: 201kg
• Heat loss: 78W
• ErP rating: C
• Primary coil rating: 18.4kW
• Immersion heater: 3kW Incoloy
• Insulation: 50mm HCFC-free EnviroFoam
• Material: Duplex stainless steel
• Warranty: 25 years
• Manufactured in: UK

What’s in the Box?

1 x Gledhill PROIN180H Pro Horizontal Indirect Unvented Cylinder, 1 x 3kW Incoloy immersion heater, cold water inlet combination valve, pressure & temperature relief valve, control & overheat thermostat, expansion vessel and tundish.