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Renovate HVAC Building 2007

Deadline:13 Sept 2017, 17:00 GMT-4

Tender information

SAM.gov

JBSA LACKLAND, United States

Type: Presolicitation
Procedure: Presolicitation
Ref. number: c64c956e8714a6859bf8152ec2da4d99
NAICS: 238220

Question: Revised Section 01 11 00 paragraph 1.4.b states, "The Noise Criterion (NC) for the project area within the building is 35db. All new VAV and air side units shall be attenuated such that all new and interdicted …

ductwork and the balanced air flow shall meet the NC." Does the Government require maximum 35dB or NC35 for Room 119C? In our opinion, limiting the Contractor to straight 35dB across all frequencies is not feasible for this project. The following highlights the difference between "dB" levels and "NC

" ratings: Noise Criterion (NC) were established in the U.S. for rating indoor noise like noise from air-conditioning equipment and similar. In Europe it is common to use the Noise Rating Curve - NR <http://www.engineeringtoolbox.com/nr-noi

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