Gledhill PLUHP300 300L StainlessLite Plus Heat Pump Unvented Hot Water Cylinder

The Gledhill PLUHP300 is a 300L (287L actual) unvented stainless steel hot water cylinder specifically engineered for heat pump systems. It delivers mains-pressure domestic hot water using a high-efficiency multi-pass corrugated stainless steel coil optimised for the lower flow temperatures typical of air source and ground source heat pumps.

Built on the proven StainlessLite Plus platform with high-density HCFC-free insulation and duplex stainless steel construction, it suits both domestic and light commercial applications. Trade professionals and installers value its G3-compliant design, secondary return facility and 25-year warranty for reliable long-term performance in new-build or replacement projects.

Key Features

• Designed specifically for air source or ground source heat pumps
• High-efficiency multi-pass corrugated stainless steel heat exchanger coil (3m² surface area)
• 3kW Incoloy immersion heater for emergency backup or boost
• Duplex stainless steel cylinder construction
• High-density HCFC-free Envirofoam insulation
• Secondary return connection as standard
• ErP rating C with low standing heat loss
• 25-year manufacturer warranty
• Supplied with cold water inlet combination valve and pressure & temperature relief valve
• 90° elbow and drain valve included

Benefits

• ✔ Maximises heat transfer from lower-temperature heat pump outputs
• ✔ Provides reliable mains-pressure hot water for larger households
• ✔ Reduces running costs through high-efficiency coil design
• ✔ Legionella protection via immersion heater backup
• ✔ Simple installation with standard connections and supplied components
• ✔ Long-term durability with duplex stainless steel and 25-year warranty
• ✔ Energy efficient ErP C rating for compliance
• ✔ Secondary return enables fast hot water delivery to multiple outlets
• ✔ Suitable for both new installations and cylinder replacements

Technical Specifications

• MPN: PLUHP300
• Brand: Gledhill
• Capacity: 287 litres
• Height: 1990mm
• Diameter: 550mm
• Weight (empty): 46.6kg
• Weight (full): 334kg
• Heat pump coil surface area: 3m²
• Immersion heater: 3kW Incoloy
• ErP rating: C
• Standing heat loss: 86W / 2.06kWh/24h
• Secondary return: Yes
• Material: Duplex stainless steel
• Insulation: High-density HCFC-free Envirofoam
• Warranty: 25 years

What’s in the Box?

1 x Gledhill StainlessLite Plus Heat Pump Unvented Cylinder PLUHP300, 1 x 3kW Incoloy immersion heater, 1 x cold water inlet PRV combination valve/expansion relief valve, 1 x pressure and temperature relief valve, 90° elbow, drain valve and fittings.