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This site is designed to give an overview of advanced hot water requirements to use when designing hot water systems
Check on your progress©
Check on your progress©
G3 requirements
G3 requirements
PART G 2010.pdfG3 is the approved document covering hot water
The document covers a range of hot water systems providing the engineer with useful guidance to adhere to. Covering the following;
Suitable installation for the provision of hot water
A hot water system, including any cistern or other vessel that supplies water to or receives expansion water from a hot water system, shall be designed, constructed and installed so as to resist the effects of temperature and pressure that may occur either in normal use or in the event of such malfunctions as may reasonably be anticipated, and must be adequately supported.
Hot water system precautions to prevent water exceeding 100 degrees C and ensuring that discharge from safety devices is safley conveyed
The hot water supply to a bath must be so designed and installed that it incorporates measures to prevent the water exceeding 48 degrees C.
Session #002
Session #002
Image of Discharge pipework©
Image of Discharge pipework©
Session #003
Session #003
Resources that you will require©
Resources that you will require©
Image on the left is a guide to sizing a hot water storage vessel depending on the amount of people living in a property and also factoring in usage.
Remember, that a cistern size supplying the cylinder must be at least the size of the cylinder.
BSEN806-3 Loading Units
BSEN806-3 Loading Units
1 loading unit (LU) is equivalent to a draw-off flow rate QA of 0,1 l/s.
1 loading unit (LU) is equivalent to a draw-off flow rate QA of 0,1 l/s.
for example if you had 9 loading units in total the total flow rate in L/S would be 0.9 L/S, to convert this figure to cubic metres per hour of flow rate the 0.9 would be multiplied by 3.6 (0.9 x 3.6) = 3.24 cubic metres per hour flow rate.
Expansion pipe©
Expansion pipe©
Design assignment quiz©
Design assignment quiz©
Hot Water Association Documentation
Heat pump storage vessels.pdfHot water design HWA.pdfUnvented service guide HWA.pdfHWA cylinder batteries.pdfHWA connected cylinders.pdfLink to useful HotWater Content
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