|The cookie settings on this website are adjusted to allow all cookies so that you have the very best experience. If you continue without changing your cookie settings, we'll assume that you are happy to receive all cookies on our website. However, if you would like to, you can change your settings at any time using the Change cookie settings link in the Special menu.|
The Grant Vortex Eco External Oil Regular Boiler range is ideal for a variety of property types in rural areas without a mains gas supply and a high demand for hot water. The Vortex Eco External Oil Regular Boilers feature a multi-directional flueing system providing flexibility when siting the boiler. Also the Vortex Eco External Oil Regular Boiler is finished in a durable powder coat paint and features built in frost protection ensuring that the boiler is fully protected from the elements all year round. An optional sealed system kit is available for the Vortex Eco External Regular Boilers allowing for the boiler to be used with existing sealed central heating systems.
At Boilers2go we recommend the Grant Vortex Eco 15/21 External Utility Oil Regular Boiler for small to medium size properties in rural and off gas areas with a high demand for hot water. Also the Vortex Eco 15/21 External Oil Regular Boiler is a condensing boiler able to reclaim latent heat from the flue gases helping to reduce fuel bills and carbon emissions by reducing fuel consumption. In addition the Vortex Eco 15/21 External Oil Regular Boiler comes with a 2 year manufacturer's warranty for peace of mind.
The Siemens Digital Timed Zone Pack (22mm) contains 2x CZM222 2 Port Motorised Valves (22mm), 1x RWB29 Digital Programmer, 1x RAM1 Cylinder/Pipe Thermostat and 1x RAA20 Room Thermostat.
In a closed central heating system water cannot be compressed so any increase in the volume, created by an increase in temperature, needs to be accomodated. This is done with the use of an expansion vessel, when the water in the system is cold the pre-charge pressure of the system forces a diaphram in the expansion vessel against the tank towards the inlet. As the temperature increases the expanding water volume pushes against the diaphragm creating additional volume for the water to enter the expansion vessel. As the temperature decreases the pre-charge pressure forces the water from the expansion vessel back into the central heating system. This maintains a constant pressure within the central heating system and helps to reduce energy and water consumption.
In a closed hot water circuit water cannot be compressed so any expansion in volume, created by an increase in temperature, needs to be accommodated by the expansion vessel. When the water is cold the pre-charge pressure forces the membrane sack, within the vessel, to collapse until the pump is started when the sack starts to inflate. As the temperature in the hot water circuit increases, resulting in the expansion of the water within the circuit, the expanded water enters the sack creating additional volume and lowering the pressure in the hot water circuit. As the water temperature drops the pre-charge pressure force the water from the sack back into the hot water circuit.