After the calculation, the LCI evaluation level division is further
derived as shown in Table 4. the LCI is less than 3, indicating the
urgent need for the low carbon evaluation index system to identify its
own shortcomings and prioritize the optimization of the indexes with
higher weight values in order to improve its low carbon performance
under limited conditions. Meanwhile, due to the poor condition of
existing rural residential buildings, their renovation work is
relatively large. For buildings with LCI in [3, 4), the low-carbon
evaluation situation is medium, and the buildings can be retrofitted
according to different criteria, giving priority to indicators with good
low-carbon performance. buildings with LCI in the range of [4, 5]
can temporarily not be retrofitted because of good conditions in all
aspects. buildings with LCI of high or medium carbon type, this paper
hopes that through retrofitting, the LCI can reach a score of 4 or
higher to achieve their low-carbon Transformation.
Table 4 Classification of evaluation levels