Synergy Energy Efficiency Index (HK) - Residential Sector: 104%

home trending_up

Research Findings

The score of Intensity Effect is larger than 100% indicating that by 2014, the change in energy consumption for the exact same activity is smaller compared to that of year 2000. The Residential Sector is comprised of four segments namely, Public, HASS (Housing Authority Subsidized Sale Flats Segment), Private and Others. Although the total energy consumption in TJ of four segments has increased, the Intensity Effect of all segments (except Others) have exhibited an increase over the years (2000 - 2014). Compared to last year's score of 97% in Residential Sector, both Public and Private sectors in 2014 have made a significant contribution to the increase apart from the previous increasing sector, merely HASS.

To Conclude: Based on this year's analysis, the Index score of Residential Sector is 104%. The index using 2000 as a base year, has revealed that 4% more energy was used compared to the past when performing the same activity in residential sector over the last decade (2000-2014). The Residential Sector, which experienced a very short saving behavioral pattern in 2013 and has obviously gone back to the high spending pattern in energy usage in 2014.



Table 2: No. of households by segment by years
Number of household (1,000) / Year 2000 2010 2013 2014
Public 691.1 744.6 772.1 781.5
HASS 324.7 392.9 391.6 393.9
Private 1,014.8 1,265.7 1,315.8 1,325.1
Others 104.5 157.7 168.2 171.4
Total 2,135.1 2,560.9 2,647.7 2,671.9


Table 3: Energy Consumption by segment by years
Energy Use (TJ) / Year 2000 2010 2013 2014
Public 15,343 16,152 16,836 17,583
HASS 7,207 10,084 9,566 10,123
Private 22,967 28,730 28,976 31,047
Others 3,549 3,430 4,080 4,205
Total 49,066 58,396 59,458 62,958


Table 2 shows the period-wise Intensity Effects of HASS, Private, Public and other housings. From 2000 to 2014, Private Housing, whose number of household increased by 31%, and by 64% especially in Others segment. Table 3 indicates the overall energy consumption increased by 28% over the period.



Table 4: Effects by segments
ÄExk (2000, 2014) Activity Structure Intensity Weather Total Effect
Public 3,501.48 -1,515.52 429.77 -175.74 2,240
HASS 2,097.62 -475.60 1,407.68 -113.71 2,916
Private 5,767.26 1,076.43 1,633.26 -396.95 8,080
Others 742.70 912.85 -924.35 -75.20 656
Total 12,109.10 -1.84 2,546.40 -761.60 13,892


From 2000 to 2014, The Public, HASS and Private were the main contributor to the increase in intensity effect, except the Others. However, the performance of the major three sectors hasn’t followed the pattern of 2013 and made improvement in energy efficiency. In other words, more works could be done to promote energy saving to each segments, especially for Private Sector.



Chart 1: Intensity Effect by Segment - Residential

Isolating the effect in the growth of the residential sector which comprised of Public, HASS, Private and Others, which resulted in an increases in total number of households, the significant increase in net Intensity Effect (energy consumption) could be explained by the surge in energy consumption of all segments (except Others), especially in Private segment. The decrease in the segment brought by Others is too insignificant to offset the consumption growth brought by Public, Private and HASS.

© 2017 Energy Efficiency Index.