B20-133 Derry Public Library Chiller Bid AttachmentSize b20-133_derry_public_library_chiller_bid.pdf156.5 KB b20-133_derry_library_chiller_19143_hvac_stamped_003.pdf1.46 MB question_on_volume_of_water_in_chiller_.pdf59.11 KB b20-133_pre_bid_walk_through.pdf155.76 KB