Retrofit

Retrofitting Strategy	Re-allocation of office layout plan and/or lighting distribution plan to maximise daylight penetration and match the demand
	Office can be renovated to maximise the utilisation of natural day light.
	Consideration
	Barriers to natural lights such as high cabinets, and partitions should be reduced. Light-coloured furniture and wall painting should be used. Light shelf can be installed if suitable, to reflect external light to the ceiling of inner zones of the space. Daylight sensors can be used to dim down the perimeter zone lighting level when natural light is adequate. Care is to be taken as to contradicting the operation of the curtain for preventing glare when the curtain comes down and the artificial lights are at max lux level.
	Estimated Saving
	kW_LGT_PRENLGT_PRELF_PREOPHR_PRE,yr – kW_LGT_POSTNLGT_POST LF_POSTOPHR_POST,yr Where LF_PRE = 1 for ON/OFF control under normal operating time of premises LF_POST =LF₁IFA_1,POST/IFA + LF₂IFA_2,POST/IFA + … + LF_iIFA_i,POST/IFA LF_i = (1 – 0.330.5) = 0.85 for 33% power reduction (dim-down to 50% lux level) at 50% of time as an example IFA = internal floor area IFA_i,POST = effective IFA where improvement taken place OPHR,yr = hr/dayday/wk52 Please click HERE to view the list of terminology.