Retrofit

Retrofitting Strategy	Using lower pressure drop air filters with new technologies and features that can improve filter efficiency
	Adopting provisions that can enhance the filtering efficiency can allow the use of filters with lower pressure drop while having similar filtration efficiency. This can reduce the fan power of AHUs.
	Consideration
	Energy Saving Sonic (ESS) Technology. A new technology that utilises sonic energy to induce rapid vibration of the particles in air. It can greatly improve the filtration efficiency and reduce energy use and cost of consumables for sustainable air filtration. Ionisation technology that uses negative ions to remove small particles in the air. This can help reduce odours and inhibit viruses, bacteria and mould species. Nanofibrous filter that achieve a higher filtration efficiency at lower pressure drop.
	Estimated Saving
	[0.605(LF_SM,PRE – LF_SM,POST) + 0.395(LF_WN,PRE – LF_WN,POST)]NAHU_PREkW_AHU_PRE * OPHR,yr Where LF_AHU,POST= LF_AHU,PRE* [(DP_FLT_PRE – P_FLT_POST) / DP_AHUF] For VSD: LF_SM = 0.795, LF_WN = 0.562; For EC or DC-motor: LF_SM = 0.71, LF_WN = 0.38 OPHR,yr = hr/dayday/wk52 Please click HERE to view the list of terminology.