Year guarantee*
Grant DuoWave Cylinders
The 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.
Features & benefits
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 pre-set 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.
- Ozone depletion potential (ODP) = 0
- High performance solar coil
- Maximises overall efficiency
- 25 year material guarantee on cylinder/store shell (Subject to Terms & Conditions)
- No anode required
- Immersion heater
- Fast recovery stainless steel corrugated coils
- Labelled and colour-coded tappings
- Global warming potential (GWP) = less than 3
Grant Wave Cylinders
Wave cylinders and thermal stores have been developed to the highest specification, as you would expect from any Grant product. The cylinders have powerful mains-pressure performance with exceptionally high hot water flow rates, while the thermal stores have been specifically designed to enable complementary technologies to be easily combined.
The Wave range of cylinders and stores have sizes ranging between 125 and 500 litres, and are designed to be coupled with almost any household hot water system from oil and gas boilers to electric heating, air source heat pumps and even solar thermal.
Find an engineer
Search our extensive engineer network and locate a technician in your area
Specification
Product code |
Model |
Weight Empty |
Weight Full |
Height |
Width |
Depth |
Efficiency |
NOx Emissions |
Energy Rating |
Energy Label |
Product Fiche |
|---|---|---|---|---|---|---|---|---|---|---|---|
| GDUO/DIR170 | Grant DuoWave solar single coil direct s/s 170 litre cylinder | - | - | 1075mm | 580mm | 580mm | - | - | b Heating | View | View |
| GDUO/DIR200 | Grant DuoWave solar single coil direct s/s 200 litre cylinder | - | - | 1230mm | 580mm | 580mm | - | - | c Heating | View | View |
| GDUO/DIR250 | Grant DuoWave solar single coil direct s/s 250 litre cylinder | - | - | 1480mm | 580mm | 580mm | - | - | c Heating | View | View |
| GDUO/DIR300 | Grant DuoWave solar single coil direct s/s 300 litre cylinder | - | - | 1745mm | 580mm | 580mm | - | - | c Heating | View | View |
| GDUO/DIR400 | Grant DuoWave solar single coil direct s/s 400 litre cylinder | - | - | 2110mm | 580mm | 580mm | - | - | c Heating | View | View |
| GDUO/IND170 | Grant DuoWave solar twin coil indirect s/s 170 litre cylinder | - | - | 1075mm | 580mm | 580mm | - | - | b Heating | View | View |
| GDUO/IND200 | Grant DuoWave solar twin coil indirect s/s 200 litre cylinder | - | - | 1230mm | 580mm | 580mm | - | - | c Heating | View | View |
| GDUO/IND250 | Grant DuoWave solar twin coil indirect s/s 250 litre cylinder | - | - | 1480mm | 580mm | 580mm | - | - | c Heating | View | View |
| GDUO/IND300 | Grant DuoWave solar twin coil indirect s/s 300 litre cylinder | - | - | 1745mm | 580mm | 580mm | - | - | c Heating | View | View |
| GDUO/IND400 | Grant DuoWave solar twin coil indirect s/s 400 litre cylinder | - | - | 2110mm | 580mm | 580mm | - | - | c Heating | View | View |
| GDUO/PLUS300 | Grant DuoWave Plus vented triple coil solar indirect s/s 300 litre cylinder | - | - | 1745mm | 580mm | 580mm | - | - | c Heating | View | View |
| GDUOPLUS300U | Grant DuoWave Plus unvented triple coil solar indirect s/s 300 litre cylinder | - | - | 1745mm | 580mm | 580mm | - | - | c Heating | View | View |
Related products
Sahara Collectors
- Serpentine pipe configuration ensuring maximum heat transfer
- On-roof, in-roof and flat-roof collector mounting systems, both in portrait and landscape
- Solar Keymark approved, allowing homeowners to access the Renewable Heat Incentive (RHI)
Domestic hot water (DHW) boost kit
- Automatically switches on the cylinder’s immersion element
- Automatic bacteria protection
- A requirement of SAP - should be fitted with every heat pump/cylinder installation.
