The costing for the various schemes was carried out using two methods. The first was to calculate the capital costs and the second was with a loan. When looking only at the capital costs, a payback period was calculated with the capital cost being paid for by savings in energy use.
Using the loan would nearly double the payback period compared to just the capital costs. The final cost calculations for this section have been done without taking into account the loan as there are currently interest free loans available for this type of improvement. It should be noted that there is no guarantee that these will still be present in the future, however, the improvements could be come significantly more cost effective in the future if energy prices continue to increase.
|
Best Scheme |
Realistic Scheme |
||
|
Total Cost (£) |
Payback (Years) |
Total Cost (£) |
Payback (Years) |
3 Storey Tenement Block |
75,607.6 |
19 |
53,307.4 |
15.63 |
4 Storey Tenement Block |
99,768.8 |
19.75 |
70,461.2 |
16.15 |
3 Storey Council Flat |
53,762.6 |
7.68 |
34,633.6 |
6.64 |
4 Storey Council Flat |
69,308.8 |
7.96 |
45,562.8 |
6.86 |
Detached House |
21,894.3 |
18.52 |
14,681.2 |
14.77 |
Semi Detached House |
18,463 |
16.93 |
12,569.6 |
13.70 |
Mid Terraced House |
15,031.8 |
15.47 |
10,458.1 |
12.57 |
Total for Project Area |
36,033,644 |
|
25,098,447 |
|
Table 1: Shows the costing and payback for the two recommended improvement schemes for the realistic base case.
The total annual CO2 saving for the realistic scheme is around 5,200 tonnes and with a capital cost of £25 million. This gives a cost of £241.44 per tonne CO2 saved over a 20 year period. This compares with a cost of £268 per tonne for the best case scheme. The energy consumption saved in the area could also be found. The gas savings were around 21.41 GWh and electricity savings were found to be 0.621 GWh from the current consumption data of Dennistoun.
The findings for the other scheme combinations with the two base cases can be found on the download page.