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5 Environmental Report (continued)
Energy
Figure 2: Ministry for the Environment electricity usage per m2
In 2004-2005 the Ministry increased electricity usage by 1.6% to 423,722 kWh. Due to the increase in staff numbers over this period there was an 8.3% increase for offices with 'tenant-only electricity' (ie, excluding heating, ventilation and air conditioning (HVAC)) but a 5.4% decrease in HVAC offices. Our offices continued to perform close to or well below their respective Energy Efficiency Conservation Authority low-usage benchmarks.
Note that all figures exclude Auckland office energy figures. As energy costs are included in the lease, energy use cannot be separated out from the total lease payment.
The figures for Auckland have been taken out of the 2002/03 and 2003/04 datasets so comparisons are relevant.
Table 3: Benchmarking our performance
|
Actual 2004/05 |
Actual 2003/04 |
Actual 2002/03 |
Low-typical usage benchmark* | |
|---|---|---|---|---|
| Offices - tenant electricity only (KWh/m2) | 65 | 60 | 62 | 60-150 |
| Offices - with HVAC (KWh/m2) | 112 | 119 | 140 | 200-280 |
* Per Energy Efficiency and Conservation Authority (EECA)
The move to Environment House has seen the introduction of new energy efficiency measures such as occupancy sensors on corridor and bathroom lights, low energy appliances and a state-of-the-art air conditioning system. Energy use will continue to be monitored with the expectation that the Wellington office's energy use will reduce over the next 12 months.
| Key targets and commitments | Progress at 30 June 2005 |
|---|---|
| Maintain offices energy performance within the low EECA benchmark. | Ongoing: Continue to monitoring of energy use and measures to maximise energy efficiency. |
| Achieved: Wellington staff moved into new office in June 2005. |
