In order to sufficiencyincrease the efficiency of basement ventilation at Nahar Complex, we submitted different proposal at various stages, which are as follows:

1) Proposal -11:
On 12/2/18 we submitted first proposal of basement ventilation ; its synopsis is depicted below
Equipment:
a) 8 nos. Centrifugal fans
b) 11 nos. Turbo jet fans
cost involved: BDT 77 lacs
2.
2) Proposal 2:
inIn order to minimize the costingcost, we reviewed the previous costing and the following revised cost synopsis is stated:
a) By changing the type of fans, i.e. using 8 nos. Axial flow type fans, instead of centrifugal fans and other items will be same as mentioned above. Total Estimated cost involved: BDT 55 lacs
3.
3) Proposal -33:
further weWe have reviewed further to minimize the cost ;we have prepared proposal 4, preparing Proposal 3, which has two Alternative likealternatives; however, Alternative -1&Alternative -2,which is1 and Alternative 2 do not provide adequate for sufficiency ofor sufficient ventilation system atsystems for basement 3, but we can improve our existing systems at basement 3 by adopting any one alternative. Alternative: 1:
a) By retrofitting 4 nos. existing centrifugal fans cost involved: BDT 20 lac
b)Alternative 1:
a) By involving 4 nos . new centrifugal fan and, estimated cost comes out to be BDT 30 lacs
a
A decision is required, inregarding which alternative we will go ahead with.