20 THE WORLD OF HOSPiTALiTy
CATERING
Hot Water For Energy-
Catering outlets concerned about energy
costs impacting on the bottom line would be
advised to review their current hot water
provision. Getting rid of a wasteful and costly
hot water storage system could make a
significant impact to running costs, with the
potential of saving up to 30% on fuel bills,
when replaced by a technologically advanced
Rinnai Infinity condensing continuous flow gas
fired water heater system.
This especially impacts on kitchen use where
there is a continual demand for hot water
throughout the day – and often well into the
night. According to Rinnai UK, this is only
method that can ensure cost effective hot
water, whenever it is needed and that will
never run out, and that guarantees to save
a business thousands of pounds in energy
and water usage over its lifetime along with a
myriad of unrivalled benefits to the end user.
The infinity systems flexibility and robust
design ensure system positioning is flexible
and can be decentralised which would add
efficiency points to the installation under
proposals to Part L of the building regulations.
There is also the superlative benefit of the
high tech self-diagnostic tools deployed within
every Infinity unit giving the end user, system
updates constantly along with peace of mind. With a stored system heat loss calculations
can be 5.7kW with gas usage for the loss
calculated at 0.53m³ and daily gas usage at
2.19 m3. The Rinnai gas usage is a miserly
1.71m3 and no worries over standing losses.
Over a year the stored system will use 624.52
m3 while the Rinnai system will turn in a frugal
figure of 444.60 m3, a saving of 179.92 m3 or
28.8 per cent.
For example, a school kitchen installation with
three 300 litre sinks can save 29 per cent in
energy costs using a Rinnai system comprising
two Rinnai Infinity 1200 condensing gas
fired continuous flow water heaters when
compared with a similar capacity stored hot
water system, and never risk running out of
hot water even at peak times. The cost of
installation can also be considerably cheaper. Carbon dioxide emissions, too, don’t compare
favourably for the stored system as it will be
responsible for emitting 1230.22 kg/kW per
annum against 875.873 kg/kW for the ultra
energy efficient Rinnai set up which offers
a carbon saving of 354.45kg/kW (28.80 per
cent).
Most emphatically, these calculations show
the most efficient way to generate hot water
quickly and efficiently isn’t by housing a