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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.
The Glow-worm Ultracom HXI Condensing Gas Regular Boiler range is suitable for a range of property sizes with a high demand for hot water. The Ultracom HXI Gas Regular Boilers feature a built in digital programmer providing two channel programming for the central heating and hot water. Also with advanced diagnostics servicing and maintenance is made quicker and simpler which can help reduce the cost of these services to the user. The Ultracom HXI Gas Regular Boiler also has a high modulation range able to adjust the boiler fuel consumption to help reduce fuel bills while maintaining optimum efficiency. Plus the Ultracom HXI Gas Regular Boiler is LPG compatible without the need of a conversion kit making also ideal for consumers living in areas without a mains gas supply such as in rural and remote locations.
At Boilers2go we recommend the Glow-worm Ultracom 15 HXI Condensing Gas Regular Boiler for small-medium size properties with a high hot water demand. Also the boiler is a condensing boiler capable of reclaiming latent heat from the flue gases before they are expelled into the atmosphere helping to reduce gas bills. The Ultracom 15 HXI Gas Regular Boiler has a high energy efficiency rating, due to its condensing capabilities, with a SEDBUK 'A' rating the highest official energy efficiency rating in the UK. Plus the Ultracom 15 HXI Gas Regular Boiler comes with a 2 years manufacturer's parts and labour warranty for peace of mind.