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PASHW-003-100LD
7.2 Standing Heat Losses
The amount of heat that the Ecocent loses through convection to the
surrounding area (standing heat loss) is dependent on a number of things
including, for example, the target temperature and the ambient air
temperature surrounding the unit. The target temperature is an end user
choice and the ambient temperature will depend on location; clearly if the
unit is in an ‘airing cupboard’, the ambient temperature will be higher than
if it is located in, say, a utility room; the higher the ambient air
temperature, the lower the rate of heat loss. However, an illustrative heat
loss for the Ecocent is 1.09 kWh per 24hrs in an ‘average’ location of 20°C
and a target temperature of 55°C.
7.3 DHW Recovery times
The recovery time of your 100ltr Ecocent (the time it takes to return to fully
hot) depends on the storage temperature (normally 55°C), the temperature
of your cold water supply (normally taken to be 10°C), the temperature of
the air supply (at least 15°C) and the amount of water you use. Typically, a
single person uses about 45l of hot water per day. However, it would be
unusual to use all this hot water at the same time. A shower uses around 30l
and a bath uses around 65l. The recovery times based on proscribed test
data are as follows:
Volume
Time
10l
32 mins
15l
47 mins
20l
63 mins
30l
95 mins
40l
126 mins
65l
205mins