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Grant ThermaWave Thermal Stores

25 Year guarantee*

Grant ThermaWave Thermal Stores

Duplex stainless steel, open vented and sealed system thermal stores for combining multiple heat sources in a variety of configurations.

Features & benefits

With rising fuel prices, it is now more important than ever to look for ways to lower home heating costs and save energy. Many people are opting for renewable technologies to heat their homes; however, finding a way of combining several renewable technologies with traditional heating systems has proved very difficult, until now.

Thermal stores allow multiple heat sources to be connected in a number of different ways, with immersion heater(s) back-up. This makes it possible to have a gas or oil fired boiler connected to a solid fuel appliance and also a renewable heat source such as solar thermal or a heat pump. Furthermore, underfloor heating system manifolds as well as radiator circuits can also be directly connected to the store.

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The Grant ThermaWave is available in three variations:

  •  open-vented with solar coil
  • open-vented with solar and DHW coils
  • sealed system with solar and DHW coils.

 ThermaWave DHW stores have been designed for situations where there is a greater demand for domestic hot water. The addition of the DHW coil means there is no need to link the store to an additional cylinder, resulting in a more cost effective and compact installation.

 A sealed system kit is available to complement existing sealed system products e.g. oil or biomass boiler. Please note, uncontrolled heat sources like solid fuel log burners, must not be used with a sealed system thermal store or unvented cylinder.

  • Ozone depletion potential (ODP) = 0
  • 22mm and 28mm compression fittings
  • No anode required
  • Immersion heater
  • High specification 1mm thick stainless steel
  • Multi-level temperature distribution
  • Labelled and colour-coded tappings
  • 40mm injected polyurethane foam insulation
  • Global warming potential (GWP) = less than 3
Why choose Wave cylinders?

Why choose 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.

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Specification

Product code
Model
Weight Empty
Weight Full
Height
Width
Depth
Efficiency
NOx Emissions
Pressure Regulator
Immersion
Expansion Vessel
Coil Rating Primary
Coil Rating Secondary
Coil Rating Solar
Standing Heat Loss
Energy Rating
Energy Label
Product Fiche
GTHERM/250 Grant ThermaWave open-vented stainless steel 250 litre thermal store - - 1485mm 580mm 580mm - - - - - - - 16kW 2.69kW/24hrs c Heating View View
GTHERM/300 Grant ThermaWave open-vented stainless steel 300 litre thermal store - - 1735mm 580mm 580mm - - - - - - - 16kW 2.71kW/24hrs c Heating View View
GTHERM/400 Grant ThermaWave open-vented stainless steel 400 litre thermal store - - 2110mm 580mm 580mm - - - - - - - 24kW 2.94kW/24hrs c Heating View View
GTHERM300HW Grant ThermaWave open-vented stainless steel 300 litre thermal store c/w hot water coil - - 1650mm 555mm 555mm - - - - - - 46.4kW 16kW 2.64kW/24hrs c Heating View -
GTHERM300HWU Grant ThermaWave sealed system stainless steel 300 litre thermal store c/w hot water coil - - 1650mm 555mm 555mm - - - - - - 46.4kW 16kW 2.64kW/24hrs c Heating View View
GTHERM400HW Grant ThermaWave open-vented stainless steel 400 litre thermal store c/w hot water coil - - 1590mm 660mm 660mm - - - - - - 55.2kW 27.6kW 2.83kW/24hrs c Heating View View
GTHERM400HWU Grant ThermaWave sealed system stainless steel 400 litre thermal store c/w hot water coil - - 1590mm 660mm 660mm - - - - - - 55.2kW 27.6kW 2.83kW/24hrs c Heating View View
GTHERM500HW Grant ThermaWave open-vented stainless steel 500 litre thermal store c/w hot water coil - - 1835mm 660mm 660mm - - - - - - 55.2kW 27.6kW 2.98kW/24hrs d Heating View View
GTHERM500HWU Grant ThermaWave sealed system stainless steel 500 litre thermal store c/w hot water coil - - 1835mm 660mm 660mm - - - - - - 55.2kW 27.6kW 2.98kW/24hrs d Heating View View

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