Elevation & Altitude

General Guideline: As a rule of thumb, diesel and liquid propane generators typically experience a 2-3% power derating for every 1,000 feet above sea level. Natural gas generators, which are more sensitive to air density, can see a derating of approximately 4% for every 1,000 feet.

Load Assessment

Before selecting a generator, a detailed load assessment is paramount. This involves calculating the total power (kW) and apparent power (kVA) your critical systems and equipment will draw during an outage. Factors like peak demand, inrush current (for motors), and harmonic distortion (for sensitive electronics) must be considered.

Sizing for Conditions

High altitude significantly impacts generator performance. At higher elevations, the air density is lower, meaning less oxygen is available for combustion and less dense air for cooling. This results in a reduction of the generator’s rated power output, known as “derating”.

Impact on Sizing

This means you’ll need to purchase a larger generator than a similar facility at sea level to achieve the same usable power output. Generator Source’s experts account for these derating factors to ensure your generator is correctly sized for your specific elevation.

Environmental Protection Agencies

Air Quality Permits: Most industrial generators require an Air Pollutant Emission Notice (APEN) or a full air permit from relevant environmental divisions. This is particularly true for diesel engines and natural gas engines.

Operating Permits: Very large industrial sources or those with significant emissions may fall under operating permit requirements, which are more complex.

Hazardous Waste: Environmental agencies also regulate hazardous waste generation, relevant for disposal of used oil, filters, and other materials from generator maintenance.

Local Authorities Having Jurisdiction

Building Permits: Your city or county building department will require permits for the generator’s installation (electrical, mechanical, structural). For example, a Generator Installation Permit may be explicitly required for all stationary generators.

Zoning & Setbacks: Local zoning laws dictate where a generator can be placed on your property (e.g., minimum distances from property lines, buildings, or public ways).

Fire Department Approval: Local fire departments have specific guidelines for generator location, fire ratings for indoor generator rooms (e.g., 2-hour fire rating), and fuel storage.

NFPA Standards

NFPA 110 (Standard for Emergency and Standby Power Systems): This crucial standard is widely adopted and enforced. It outlines requirements for generator sizing, installation, maintenance, testing (including monthly load exercising and tri-annual load bank testing), fuel storage, and documentation for critical applications (Level 1 and Level 2 systems).

NFPA 70 (National Electrical Code – NEC): Governs the electrical wiring and connections for generator systems, ensuring safety and proper integration with your facility’s electrical system.

Climate & Weather Resilience

Cold Starts: Generators need to be equipped with block heaters and battery chargers to ensure reliable starting in cold winter temperatures.

Extreme Heat: Proper ventilation and cooling system design are essential to prevent overheating during hot summers, especially in enclosed spaces.

Snow & Wind: Enclosures must be robust to withstand heavy snowfall and high winds, protecting the unit from elements and ensuring optimal operation.

Noise Ordinances

Industrial generators, especially larger ones, can be noisy. Municipalities have specific noise ordinances that must be met.

Mitigation: High-quality, sound-attenuated enclosures are almost always necessary. Strategic placement, acoustic barriers, and specialized mufflers may also be required.

Examples: Regulations may specify limits like 55 dBA (day) and 50 dBA (night) for residential areas, or 65 dBA (day) / 60 dBA (night) for commercial property lines.

Site Preparation

Foundation: A robust, level concrete pad is essential to support the significant weight of industrial generators and minimize vibration.

Ventilation & Exhaust: Proper air intake for cooling and efficient routing of hot exhaust gases away from the building are critical for performance and safety. This often involves large ducting or specialized stacks.

Accessibility: Ensure sufficient clear space around the generator for routine maintenance, repairs, and fuel delivery. Local regulations may mandate specific clearance distances.

Benefits of New Industrial Generators

• Latest Technology: Includes advanced control systems and superior fuel efficiency.
• Full Manufacturer Warranty: Provides peace of mind and long-term support.
• Emissions Compliance: New diesel units typically meet current emissions standards, which is crucial for permitting.

Benefits of Used Industrial Generators

• Significant Cost Savings: A more budget-friendly option without sacrificing reliability.
• Faster Availability: Often quicker to acquire and install than new, custom-ordered units.
• Sustainability: A greener choice by extending the lifespan of existing equipment.
• Why Buy Used from Generator Source: We specialize in high-quality used generators. Our rigorous inspection and refurbishment process ensures every unit meets strict performance standards. We thoroughly test, service, and, if necessary, repair units to deliver dependable power.