What are reheat batteries?
In some applications it is useful to have the air coming into the rooms in the building at a higher temperature than the exhaust air to assist in heating the building. In these cases a reheat battery is fitted to the incoming air duct after the heat recovery unit. This reheat battery can be warmed with ground source heat if required. This is advantageous where there are restrictions which prevent the installation of underfloor heating, or where low surface temperature radiators are employed. In the latter case the incoming heated air can be used to reduce the temperature gradient through the height of the room and the extra heat enables the radiators to operate at a temperature better suited to ground source heat pumps.
