Rinnai Amplify Installationsanleitung PDF herunterladen (Seite 31)

Rinnai Heating Specication Guide 02-13 | 31

Rinnai iHeat running costs

Running costs for the Rinnai iHeat are still being collated as we are trying to base the information on

'real' installations around the country. Once the information has been ﬁnalised it will be loaded on the

Rinnai websiterefer to the iHeat product within the heaters category on www.rinnai.co.nz.

Running cost assumptions and calculations

LPG gas bottle energy calculation

1 kg of LPG gas contains 50.4 MJ of energy

1 kW = 3.6 MJ

This means that a 45 kg LPG bottle has 2268 MJ (45 kg x 50.4 MJ)

LPG and Natural Gas costs

Natural Gas costs are based on the Genesis Energy Auckland lifestyle plan as at 11 March 2013

(6.63c/kWh) including GST, a 10% prompt payment discount, and excluding the ﬁxed line charge.

LPG costs are based on the Genesis Energy Auckland standard charges ($96.53 per 45 kg bottle reﬁll

and standard delivery), including GST, and excluding LPG annual bottle rental, and excluding electricity

running costs. The LPG cylinder cost has been rounded up to $97

The cost of LPG and Natural Gas will diﬀer in each area, please check with your local supplier. The cost of

cylinder rental, line charges and other variables are not included in the running costs.

Calculating your own running costs

To calculate running costs on LPG:

1. Calculate the cost of gas per MJ/h, for example; $97 ÷ 2268 MJ = $0.043 per MJ/h

2. Calculate the approximate running cost per hour, for example; $0.043 x 5.80 MJ/h = $0.25 per hour

To calculate running costs on Natural Gas:

1. Convert the MJ input of the appliance to kW, for example; 5.80 MJ/h = 1.61 kW/h

2. Calculate the approximate running cost per hour, for example; $0.063 x 1.61 kW/h = $0.10 per hour

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Rinnai Amplify Installationsanleitung Seite 31