Pump Room Acoustic Enclosure

Pump rooms in commercial buildings, industrial plants, and water treatment facilities generate continuous low-frequency noise that propagates through structure and air — affecting occupied spaces above, beside, and sometimes two floors away from the source.

HEMU Acoustics offers two complementary approaches: whole-room acoustic treatment (wall, ceiling, and floor absorption and isolation lining) and individual equipment enclosures. For most applications, a combination delivers the best result at the lowest cost.

**Whole-Room Treatment** replaces or supplements existing room surfaces with high-STC composite panels on walls and ceiling, floating floor systems on concrete decks, and sealed acoustic doorsets. Adding STC 45 wall treatment to an existing concrete block pump room can increase the room's apparent isolation by 10–15 dB(A) — particularly important for low-frequency (63–250 Hz) pump noise that passes through lightweight partitions.

**Individual Pump Enclosures** are fabricated acoustic hoods or boxes sized to the specific pump unit. Steel panels with 50–75 mm mineral wool lining are assembled around the pump skid. Pipe penetrations use close-fitting acoustic lagging and flexible boots to prevent short-circuit. Motor cooling air enters through lined splitter silencers and exhausts through a separate lined outlet.

Anti-vibration mounts under pump skids (spring or rubber isolators, selected by pump RPM and flow impulse frequency) reduce structure-borne transmission to < –30 dB relative to rigid mounting. Flexible pipe couplings at inlet and outlet prevent vibration bridging through pipework.