The Grant 30 Litre external volumiser is designed for installation with Grant air source heat pumps when the combined volumiser/low-loss header cannot be fitted inside. A vessel that sits behind the heat pump and increases the volume of the system. Supplied in a weatherproof casing and insulated for external installation, complete with 3kW heater and relay.
Grant 30 Litre External Volumiser c/w 3Kw Backup Heater
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