## 5 Assessment and Deployment
### Deployment and Discussion  
Leading research has been conducted to explore the factors affecting energy efficiency in residential homes. To this end, a hybrid approach was proposed to reveal findings with greater detail and accuracy. This section reviews the findings. These suggest that some were commonly found in modeling without using the proposed approach and using it. These findings are as follows.  
* In general, the installation of boilers will lead to an improved energy efficiency. Dwelling which installed boilers in 2009 have better energy efficiency than others and ones which install boiler in 2010 have the weakest performance, which is seen as an urgent need to replace or modify these boilers.
* Most old homes suffer from unfavorable energy efficiency. This is also reflected in the proposed approach. Homes in the high-consumption cluster are older than those in the low-consumption cluster. In old houses, the appliances and structures have a poor energy efficiency performance. Therefore, planning for structural improvements, installing proper insulation and switching equipment, especially in high-consumption cluster houses, is a constructive way to improve energy efficiency.
* Not using electricity tariffs 7 yields better energy efficiency group in most homes.  
The interesting point is that the proposed approach, in addition to the results described above, could also reveal new findings. In fact, this approach offers more detailed results (Table 7). A scrutiny of the data through the proposed approach provides new findings, as follows.  
* In homes with similar attributes, not using this tariff has resulted in a better energy efficiency group. However, the electricity tariff 7 has different effects in each cluster. An analysis of the approach presented shows that in the low-consumption cluster, the energy efficiency is poor, particularly in small (less than 51 m2) and old houses which do not use this tariff.  
It was especially seen in the medium-consumption cluster that big (over 151 m2) and old houses which use this tariff have a better energy efficiency.  
* The building structure influences different effects in the proposed approach. In the medium-consumption cluster, flats have a more favorable energy efficiency group than other structures, even among the newly built ones. Also, old homes which are structured as detached have a good energy efficiency group in this cluster. On the other hand, it has been seen before that old houses do not have a good energy efficiency.  
In the high-consumption cluster, buildings with mid-terrace and end-terrace structures which have installed boilers belong to a better energy efficiency group.  
* In the high-consumption cluster, homes in Wales have better energy efficiency than homes with similar attributes but which are in different areas.  
Table 7 shows the findings, analyzing the entire dataset and each cluster separately. New findings extracted which are obtained from the proposed approach are shown as new finding. This suggests that the approach presented can discover findings in more detail and this proves the ability and usefulness of this approach in discovering unknown information. These detailed findings can be very helpful for policy maker, architects, and engineers.