CPCB-Compliant Acoustic Enclosures
for DG Sets & Industrial Generators
KBG Group designs and manufactures acoustic enclosures achieving 25–35 dB(A) noise reduction — meeting CPCB E(P) Act noise emission standards for diesel generators in commercial, industrial, hospital, and data centre applications. Available for 250 kVA to 3000 kVA generator capacity range.
dB(A)
kVA
Why DG Set Noise Compliance Is Mandatory
The Central Pollution Control Board (CPCB) has mandated noise emission limits for diesel generators under the Environment (Protection) Act. Non-compliance attracts notices, fines, and facility shutdown orders.
CPCB Noise Limits
Daytime noise limit: 75 dB(A) at 1m from the enclosure. Night-time limit: 70 dB(A). Applies to all DG sets above 5 kVA. Generators without compliant enclosures are in violation of the E(P) Act, 1986.
Insertion Loss Design
KBG enclosures are designed using double-skin panel construction with high-density mineral wool or rockwool infill. Panel NRC (Noise Reduction Coefficient) is calculated to achieve the required insertion loss at each octave band frequency.
Compliant in 15 Days
Submit DG set make, kVA rating, and acoustic brief. KBG designs and manufactures the enclosure with integrated AMCA-certified acoustic ventilation louvers, maintenance access doors, and fuel/exhaust pass-throughs. Delivered in 15 working days standard, 8 days expedited.
Acoustic Enclosure Technical Specifications
Standard parameters — all enclosures manufactured to generator-specific custom dimensions.
| Sound Insertion Loss | 25–35 dB(A) standard range (design-specific) |
| Generator Capacity | 250 kVA – 3000 kVA (custom for any size) |
| Panel Construction | Double-skin GI (1.2mm + 0.8mm) with mineral wool infill |
| Core Density | 48 / 64 / 96 kg/m³ mineral wool or rockwool |
| Frame | Structural steel, hot-dip galvanized (IS 2629) |
| Ventilation | Integrated AMCA-certified acoustic louvers (IS 12433) |
| Access | Hinged maintenance doors, removable inspection panels |
| Exhaust Duct | Flexible bellows + acoustic attenuator silencer |
| Surface Finish | Powder coat RAL 9002 / custom colour / mill finish |
Standards & Compliance
- CPCB E(P) Act DG Set Noise Emission Limits — primary compliance
- IS 12213 Code of Practice — Acoustic Enclosures
- BS EN ISO 3741 Acoustics — Sound Power Level Determination
- IS 12433 Ventilation Louvers — integrated in all enclosures
- IS 2629 Hot-Dip Galvanizing for structural frame
- ISO 9001:2015 Quality Management System
Products Used in DG Set Enclosures
Noise Control Systems
Acoustic panels, barriers, and absorptive wall systems used in DG enclosure panel construction. 20–35 dB(A) insertion loss range.
View Product Range →Acoustic Ventilation Louvers
Integrated acoustic louvers provide ventilation air to the generator while maintaining the enclosure's noise attenuation performance.
View Product Range →Industries Using KBG DG Set Enclosures
Get a CPCB Acoustic Compliance
Assessment for Your DG Set
Submit your DG set make, kVA rating, site boundary distance, and existing noise readings. Our acoustic engineers will provide a preliminary noise assessment and recommend the right enclosure specification to achieve CPCB compliance.
- DG set make, model, and kVA rating
- Distance from generator to nearest site boundary
- Existing measured noise level (if available)
- Site plan or layout drawing (optional)