Duplex stainless steel, unvented, direct solar single coil and indirect solar twin-coil mains pressure hot water cylinders for renewable applications.

Grant DuoWave Cylinders

Grant DuoWave Solar CylinderThe DuoWave range of mains pressure hot water cylinders were developed to meet the growing demand for systems that combine a renewable heat source with a standard oil, gas or electric boiler. They are particularly suitable for use with solar hot water systems like Grant Solar Thermal. When correctly installed this arrangement can significantly reduce the dependence on traditional fossil fuels resulting in lower energy bills.

Sizes range from 170 litres to 500 litres, comprising five direct and six indirect models which can meet the needs of even the largest of domestic properties.

Direct and Indirect options
Direct models are designed to be electrically heated but also incorporate a high performance solar coil to allow easy connection to a solar thermal system.

Indirect cylinders have two coils for connection to primary heat sources. The solar heat supply should be connected to the bottom coil which is designed to preheat or heat the surrounding water, depending on the temperature of the incoming supply. The central heating boiler connections should then be made to the top coil. The boiler will only operate if the water in the cylinder has not reached the desired preset temperature and the boiler/cylinder controls are installed and commissioned correctly. Featuring high efficiency corrugated heating coils, the Grant DuoWave range is developed to ensure a maximum transfer of the energy collected by renewable systems.

As a safety feature, indirect cylinders come with a control/high limit thermal cut-out that operates at 90°C.

Grant DuoWave Plus cylinders
The Grant DuoWave Plus is a further development of the DuoWave cylinder range and is available in a 300 litre model only. This cylinder is designed to combine different heating technologies within a single system by utilising up to three separate high performance heating coils and one 3kW immersion heater. The DuoWave Plus cylinder can combine solid fuel (open-vented system only), biomass, gas, electric or oil-fired boilers with solar thermal systems.

 

 

Scroll across to view all table contents

Cylinder and Thermal Store Case Studies

Living with a Grant Vecta biomass boiler

Grant UK visited Mike and Sarah Hodgson who recently had a Vecta wood pellet boiler installed at their property, to discuss why they chose this renewable technology and to uncover a homeowner’s perspective of living with biomass. At the beginning of 2017, Mike and Sarah Hodgson had an internal VectaRead More

Townsends take up renewables

Established in 1945, W.J Townsend & Son is a family run business providing domestic customers in Towcester and surrounding areas with a comprehensive range of plumbing and heating services. The business has been in the family for over 75 years with William John Townsend, founding the company. Andy his sonRead More

East Green Energy lead the way with Grant Spira

Renewable energy specialists East Green Energy are leading the way by installing an award wining Grant Spira Wood Pellet Boiler in their showroom at the Company’s Suffolk headquarters. Believed to be the only showroom in East Anglia with a fully working Wood Pellet Boiler, it is certainly generating a greatRead More

Installer promotes advantages of renewable heating

Long established plumbing and heating installers, Great Yarmouth Heating Company Ltd, is promoting the benefits of energy saving, by kitting out their premises with an array of Grant MCS approved renewable technologies. Based on Gapton Hall Industrial Estate, GYH was founded in 1971 and has installed, serviced, and maintained GrantRead More