Near hotels, hospitals, schools, shopping centers or offices
The project needs lower equipment noise at an outdoor plant area, parking facility, site boundary or building-service zone.
Product Range / Low-Noise Outdoor Power
Sound-Attenuated Diesel Generator Sets
A weather-protected package that brings the generator set, acoustic airflow paths, exhaust routing, controls and service access into one outdoor power unit. It suits sites close to occupied areas or projects that want to reduce on-site enclosure work, provided rating, noise, cooling, exhaust and maintenance requirements are confirmed together.
Low-Noise DeploymentOutdoor ProtectionService AccessSystem Options
Why Choose a Sound-Attenuated Set
For outdoor installations near occupied areas, it is easier to address noise, weather protection and routine service in one package
The enclosure does more than hide the engine. It must balance acoustics, cooling, weather protection, service access and transport as one engineered assembly. Site conditions determine whether it is the right format.
When a separate plant room or acoustic enclosure is not preferred
Weather protection, acoustic airflow paths, service doors and the control panel are integrated for easier delivery, installation and long-term management.
“Silent” is requested without a noise target or measurement distance
Values measured at different distances, against different background noise and under different day/night limits cannot be compared directly. The acceptance boundary must be documented.
A high-capacity unit has not been checked for airflow, exhaust or door clearance
An enclosure that is too tight can restrict cooling and maintenance. High ambient temperature, altitude and confined sites require a project-specific review.
Complete Configuration Range
From compact acoustic enclosures to high-capacity low-noise packages, select the structure around the site and duty
The same rating may use different enclosure and acoustic designs. Load, noise target, ambient temperature, available space, fuel autonomy and service strategy determine the final configuration.
Compact Acoustic Enclosure
For small commercial services, telecom and independent equipment loads where footprint, transport and straightforward maintenance matter.
Standard Outdoor Sound-Attenuated Set
For common commercial and critical-facility standby duty, balancing acoustics, weather protection, cooling, fuel and service space.
Enhanced Environmental Protection
For heavy rain, dust, salt spray or corrosive exposure, with enclosure material, coating, airflow and sealing confirmed for the project.
High-Capacity Low-Noise Package
For large commercial facilities, factories and data-center support systems where airflow, exhaust, lifting and service routes require more space.
Ratings can be paired with different engine platforms and enclosure structures. The deliverable rating, enclosure size and option set are confirmed against the engine platform, 50Hz/60Hz, voltage, ambient temperature, acoustic target and site acceptance conditions.
Ratings and Engine Platforms
Covering small commercial services through projects above 1MW, ratings and engine brands can be combined to suit the project
As capacity rises, acoustic airflow paths, silencers, transport dimensions and service clearances must grow with it. Engine selection should also reflect project standards, local fuel, service coverage and parts support.
8–100kWSmall commercial services, telecom, access control, pumps and independent equipment loads, with priority on footprint and maintenance access.
100–500kWA common range for hotels, schools, shopping centers and general factories; elevator, pump, refrigeration and motor-starting loads must be checked.
500–1000kWHospitals, large commercial facilities, factories and data-center support systems, with ATS, distribution, fuel autonomy and thermal management considered together.
Above 1MWLarge critical facilities and expansion projects using one or more paralleled sets, with project-specific acoustic enclosure, airflow and service-access design.
CumminsSeries selected by rating, emissions and local service conditions
PerkinsSeries selected by project standard and maintenance coverage
BaudouinSeries selected by rating range and operating duty
WeichaiSeries selected by rating, electrical system and enclosure requirements
YuchaiSeries selected by rating, frequency and project requirements
DoosanSeries selected for higher ratings and available service support
MTUSeries selected by critical-facility standards and capacity requirements
ScaniaSeries selected by project standards and local support
IsuzuAvailability confirmed for smaller-capacity applications
YangdongAvailability confirmed for smaller-capacity applications
Design and Customer Value
Six interdependent design areas shape the real operating experience inside the enclosure
Noise reduction must not compromise cooling. Weather sealing must not block service access. A compact enclosure must not remove safety clearances. These areas determine whether the set remains stable, quiet and maintainable in real use.
Cooling Airflow and Hot-Air Separation
Air volume, system resistance and hot-air recirculation affect sustained output in high ambient temperatures.
Acoustic Air Paths and Exhaust
Air-intake attenuation, discharge attenuation, exhaust direction and backpressure must be checked together.
Service Doors, Hinges and Seals
Two-sided access, locks, hinges and seals influence service time, vibration noise and long-term weather protection.
Sheet Metal, Forming and Surface Protection
Material thickness, reinforcement, welding and coatings determine transport resistance and outdoor durability.
Base Tank and Lifting Structure
Fuel volume, level indication, fill point, lifting eyes and towing points should match runtime and handling requirements.
Controls, Emergency Stop and Alarms
The controller, protection logic, emergency stop and alarm history must support safe operation, acceptance and troubleshooting.
Six Selection Inputs
Define these boundaries before quotation so acoustics, cooling and reliable power can be designed as one system
Prime, standby and starting demand
List critical loads, the maximum simultaneous load, motor-starting methods and future expansion to establish the appropriate rating.
50Hz/60Hz, voltage and connections
Confirm project voltage, phases, power factor, ATS or paralleling needs and the low-voltage distribution interface.
Target, distance and day/night limits
State the measurement distance, sensitive receiver locations, background noise and day/night acceptance criteria.
Temperature, altitude and airflow path
High ambient temperature, altitude, confined sites and hot-air recirculation affect both available output and enclosure size.
Rain, dust, salt spray and corrosion
Match enclosure structure, coating, sealing and airflow protection to the actual level of outdoor exposure.
Runtime, inspection and remote management
Coordinate operating hours, refueling access, base or external tanks, spare parts and remote monitoring.
Choosing the Product Format
Open, sound-attenuated and containerized sets solve three different installation problems
| Comparison | Open Generator Set | Sound-Attenuated Set | Containerized Set |
|---|---|---|---|
| Best fit | A compliant plant room where ventilation, exhaust, acoustics and fire safety are delivered by the site. | An outdoor site close to occupied areas where noise and weather protection must be integrated. | A high-capacity outdoor system that needs more transport, service and system-integration space. |
| Primary value | Visible structure, direct service access and flexible system integration. | Reduces separate enclosure work by combining acoustics, protection and maintenance access. | Provides a larger enclosure, dedicated service routes and greater system-integration capacity. |
| Confirm first | Plant-room airflow, exhaust backpressure, vibration isolation and safety separation. | Measurement distance, hot-air recirculation, door sealing, corrosion protection and service clearance. | Transport and lifting, enclosure cooling, fuel autonomy, distribution, paralleling and maintenance windows. |
| Typical projects | Factory plant rooms, hospital energy centers and data-center equipment areas. | Hotels, schools, shopping centers, hospital campuses and outdoor areas near occupied buildings. | Large commercial facilities, factories, data centers and systems above 1MW. |
Typical Project Tasks
The product range stays consistent; the configuration changes with the job the site must perform
Control noise during nighttime testing and operation
For hotels, schools, hospital campuses and shopping-center service areas, confirm sensitive receivers, measurement distance, exhaust direction and service hours.
Maintain cooling and serviceability under weather protection
For factories, data centers and commercial campuses, review ambient temperature, hot-air recirculation, service doors and cable and fuel interfaces.
Reduce on-site enclosure work and system coordination
For retrofit, expansion and temporary-transition projects, confirm foundations, lifting, fuel, ATS and remote-management interfaces in advance.
Typical configurations · Not the complete range
Use typical configurations to compare output, brands and package format
The range is not limited to the models below. These examples show common outputs, brand combinations and package choices; refer to the series overview for full coverage and available options.
Typical configuration50kW · Yuchai
50 kW Silent Generator
A typical 50 kW Yuchai package balancing compact placement, lower disturbance and routine service access.
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Typical configuration200kW · Cummins
200 kW Silent Generator
A typical 200 kW Cummins package for projects needing noise control, weather protection and complete system interfaces.
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Typical configuration800kW · Weichai
800 kW Silent Generator
A typical 800 kW Weichai package coordinating high-output acoustics, heat balance, logistics and system interfaces.
View this configuration →Get a sound-attenuated generator recommendation based on your site
Share the country and city, critical loads, required rating or existing set, installation location, acoustic requirement, operating hours and fuel conditions. HOHANK engineers will define the product range and implementation boundary.