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Based on
Average COP = 4.0 & 13.85 Cent/kWh (Dayrate)
Average COP = 4.4 & 13.85 Cent/kWh (Dayrate)
11.5 Cent /kWh for Oil
6.5 Cent/kWh for Nat. Gas
12.4 Cent/kWh for LPG
The delivered cost per kilowatt hour are taken from fuel costs @ October 2005 (incl. VAT)
The cost per kilowatt hour for domestic electrical supply are taken from ESB @ January 2005
Excluding the Months of May, June, July & August - the average ambient outdoor temperature is 7oC
This implies that for an assumed worst case heat loss of 45 W/m2 the average annual heat loss is 25 W/m2
Based on a design outdoor temp of -3oC and an indoor temp of 20oC
Also the heating season is determined by the no. of hours the outdoor temp drops below 15oC and is estimated as 3200 hours
An Estimated requirement for domestic hot water is 1000 kWh per bedroom
The "No. of Bedrooms" column is used to calculate DHW running costs
While the "Gross Floor Area" Column is used to calculate space heating running costs
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