Period before work starts

"As this is the period for building up to start of work energy consumption associated with warming up of the air conditioning system is high. Especially during the winter this time period has the largest amount of energy consumption. In addition, in conjunction with people arriving for work this is the time period where lighting and outlet loads speedily increase.

No.	Primary energy conservation measures for this time period
1	If the trend during seasons when heat load is low is the same as during the summer and winter, delay starting time of the air conditioning system
2	During heating and cooling periods, turn off intake of fresh air to reduce load
3	Close blinds for windows on the east side of the building after completion of work to reduce solar radiation load the next morning
4	Perform a purge early in the morning during cooling periods to remove residual heat from the structure that is generated by solar insolation and internal heat generation during the night and on holidays to reduce the load on the air conditioning system
5	Use a flow through boiler with a fast startup time for heating to reduce operating time

Peak time period

This is the time period during the day where energy consumption is the highest. Especially during the summer, this is where maximum power consumption occurs. Therefore, energy conservation by users has a large effect. In addition, in conjunction with air conditioning load based on season, management of operating efficiency of equipment is an important energy conservation point.

No.	Primary energy conservation measures for this time period
1	Promote light load during summer period and set room temperature to energy conservation mode (government suggested temperature settings: summer – 28 oC, winter – 20 oC)
2	Fully implement policy of employees turning out lights during lunch time
3	In conjunction with seasonal load changes, manage operation of equipment including air conditioning heat source equipment and auxiliary equipment to improve overall energy efficiency
4	Adjust fresh air intake to a minimum by managing CO2 concentration and when renewing the system introduce fresh air intake control using a CO2 sensor etc.
5	When renewing the system, introduce a highly efficient heat source device and a variable air flow and variable water flow, and in addition, introduce a system with multiple units with capacity to enable highly efficient operation

Overtime working period

Compared with starting of work time period, energy consumption is slowly reduced during this period. As air conditioning, lighting, and outlets go to partial load during the overtime working period, limiting of sections and management of operating efficiency become important energy conservation points.

No.	Primary energy conservation measures for this time period
1	Limit office lighting to sections where there is someone working
2	Use partial lighting in common areas
3	Turn off heat source device prior to ending time for cooling and heating to effectively use heat in the equipment (operate pump only and use up heat in the heat source device and plumbing)
4	Select equipment for which operation can be limited to sections and use the equipment efficiently (for cases where air conditioning equipment and a heat pump are equipped for the same zone)
5	Turn water heaters and lights in wash rooms to nighttime mode on floors that have been vacated

Period when not in use (nighttime, holidays)
As this time period is outside of working hours, general air conditioning is stopped and most lighting is turned off; therefore, when compared to daytime, energy consumption is a whole lot lower. However, as with the term "base load", energy consumed during this period is consumed 24 hours a day all year; therefore energy conservation effects during this period are large.

No.	Primary energy conservation measures for this time period
1	Perform an inspection at night to confirm whether or not there is unnecessary lighting or ventilation and eliminate waste
2	Consolidate transformer load and reduce number of operating units to reduce iron losses (no load losses)
3	Reduce number of operating elevators
4	Using a timer control, turn off vending machines during the night
5	Switch to a highly efficient top runner transformer to reduce losses to a minimum