Gledhill PLUHP300DUOPP 300L 70L Buffer Pre-Plumbed Unvented Heat Pump Cylinder

The Gledhill PLUHP300DUOPP is a pre-plumbed unvented hot water storage cylinder from the StainlessLite Plus Duo range, specifically engineered for air and ground source heat pumps. It features a 300 litre cylinder capacity paired with an integrated 70 litre buffer tank in a single floor-standing unit, eliminating the need for a separate external buffer while providing reliable mains-pressure hot water.

Suitable for domestic installations in larger households or light commercial use, this duplex stainless steel cylinder comes pre-plumbed for faster installation and complies with Section G3 of the Building Regulations. It includes a high-efficiency 3 m² corrugated coil, secondary return, and 3 kW Incoloy immersion heater for backup and legionella protection.

Key Features

• 300L cylinder with integrated 70L buffer tank
• Pre-plumbed for quick installation
• High-efficiency 3 m² corrugated stainless steel coil
• 3 kW Incoloy immersion heater
• Secondary return connection
• ErP rating C with 104 W heat loss
• Floor-standing vertical design
• 25-year manufacturer warranty

Benefits

• ✔ Reduces heat pump on/off cycling for longer compressor life
• ✔ Space-saving 2-in-1 design removes need for external buffer
• ✔ Optimised for heat pump systems with large surface area coil
• ✔ Provides consistent mains pressure hot water
• ✔ Pre-plumbed components speed up on-site work
• ✔ High-quality duplex stainless steel construction
• ✔ Includes immersion for emergency backup and legionella control
• ✔ Low heat loss for improved efficiency

Technical Specifications

• MPN: PLUHP300DUOPP
• Capacity: 300 litres (cylinder) / 70 litres (buffer)
• Height: 2030 mm
• Diameter: 630 mm
• Weight (empty): 69 kg
• Weight (full): 441 kg
• Material: Duplex stainless steel
• Primary coil surface area: 3 m²
• ErP rating: C
• Heat loss: 104 W
• Immersion heater: 3 kW Incoloy
• Secondary return: Yes
• Warranty: 25 years

What’s in the Box?

1 x Gledhill StainlessLite Plus Duo 300 Pre-Plumbed Heat Pump Cylinder (PLUHP300DUOPP) with integrated buffer, pre-plumbed components, immersion heater and standard safety devices.