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Showing results for tags 'system boiler'.
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Into detail design stage for an extension to existing stone cottage. Basically a timber clad 2 storey box with a glass link to replace single storey hotchpotch that is there now. MBC have quoted for a passive slab (ouch£!) but due to size restiction will go for u=0.14 walls (open panel , 300mm finished) and u=0.14 flat roof by MBC if I can deal with the + VAT price. Existing gravity DHW gravity fed with pump for shower, supplied by a 2009 year oil fired Grant 15/28 kw utility condensing system boiler that also runs the rads. The rads will have to stay in the cottage but how to run UFH in the extension.. Based on an MBC house build nearby I'm pretty sure I won't need any heating on 1st floor apart from electric towel rads and/or electric mat for en-suite (although they don't have a link to a drafty cottage so slight concern!) Yes I'd like to do away with the oil boiler but not sure I can considering the poor performing cottage and potential costs. I'd like to go mains pressure also so UVC, (mains flow rates of 40 L/m). If so then potential for solar PV or solar Thermal if worth the investment. Do I fit a buffer for UFH to stop short cycling? Any thoughts? Any alternative schemes?
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Excerpt from a previous thread. A member asked..... "Starting our extension and renovation fairly soon so I am now looking at the type of heating system to go for. The house is roughly 100m² footprint and 450m³ volume. Insulation levels are expected to be better than building reg standard but not upto PH standard. Plan for heating and DHW in the house is as follows: UFH throughout with no rads, two towels warmers to be used though. One bath, two showers and four sinks (not decided whether both showers will be DHW or one electric yet but say both DHW for this example). Average usage of one shower and one bath per day From jsharris spreadsheet I figure that my worst month at minimum OAT heat input would be 1398kWh based on daily heat loss power of 1878W. Ideally we would like the boiler hidden from view and this could be house in either the garage or loft as both have ample space. We have both gas and electricity to the house so we are open to a wide range of possiblilities. Anyone have any thoughts on which type of boilers I should be considering? As far as manufacturers go I am willing to invest a little more for better quality (brands I have investigated so far are Valliant, Baxi and Ideal).
