An automatic standby generator is a back-up electrical system that operates whether you are at home or away. It automatically supplies power to essential circuits of your home within seconds of a utility outage. After utility power returns, the generator shuts itself off and awaits the next outage. It operates on natural gas or liquid propane and sits outside just like a central air conditioning unit.

GUARDIAN® generators supply electricity to the electrical panel circuits of your home through a built-in load center. You select the number of circuits you want to protect and match it to the appropriate generator system. Everything on that circuit will be protected. GUARDIAN also powers furnaces, air conditioners, well pumps, water heaters and other appliances that are hard wired into your electrical panel.

While portable generators do supply power, an automatic standby generator produces a higher quality of electricity. It operates automatically and runs a weekly self-test to ensure proper response to your needs. There are no extension cords to plug in and no gas tanks to fill. It operates automatically so it protects your home even when you’re away. When utility power returns, the standby generator shuts itself off.

Establishing wattage requirements of the appliances you want to power during an outage is difficult because those appliances can be plugged into various outlets in your home. That’s why GUARDIAN has simplified the process. By allowing you to protect everything on chosen circuits, you no longer have to worry about individual items.

Just like your car’s engine, generators need periodic oil and filter changes. Many customers rely on GUARDIAN’s preventative maintenance kits to satisfy routine maintenance requirements. Refer to your owner's manual for routine maintenance procedures and schedules. Kits can be purchased through the business that sold you your GUARDIAN generator.

Aluminum is corrosion resistant, so it prolongs the life and look of the generator, particularly in salt air communities.

The most accurate way is to have an electrician apply an amp meter to the circuits or appliances that will operate with emergency backup power. Measurements should be taken as the appliance starts up. That’s because start up requires the greatest amount of power. To eliminate the hassle of this process, GUARDIAN allows you to simply match your system to the existing circuits in your electrical panel. With our 8, 10, 12 or 16 circuit, pre-wired systems, we take the guesswork out of sizing. For customers concerned with air conditioning, the wattage rating of the generator and its circuit breakers inside the transfer switch should be reviewed so that A/C startup power requirements are met. (click this link for the Guardian size selector grid)

For GUARDIAN QuietSource™ liquid-cooled models, a licensed electrician must perform a site survey to determine the size and voltage of the unit to meet your backup power needs.

Whisper-Test is a feature that reduces noise by 50% during the generator’s weekly self-test cycle. That makes it as quiet as a car idling in your driveway. The generator starts up and operates at a reduced speed, lowering sound output by as much as 12 decibels for units that normally run at higher speeds under load. This allows for near-silent operation in test mode and satisfies all known sound ordinances.

GUARDIAN air-cooled models, which come equipped with a comprehensive installation manual, can take as little as four hours to install. They come pre-mounted on a composite pad to further simplify installation. Liquid-cooled generators normally require up to 14 hours to install. Because of their additional weight, liquid-cooled units must be installed on a stronger mounting surface such as a concrete slab.

Note: Time estimates are based on typical applications. Additional time may be required to run gas conduit or gas piping or to place the unit far from the incoming gas or electrical service.

or safety reasons and to be sure of adherence to local, state and national codes. It is recommended the generator be installed by an Authorized Dealer or licensed contractor. However, the air-cooled systems are prepackaged, prewired and come with comprehensive installation instructions to enable a competent “Do It Yourselfer” to participate in the installation process.

7-16 kW Air-Cooled - Natural Gas (cu ft/hr) 100-250 - LP (cu ft/hr) 50-90
20-45 kW Liquid-Cooled - Natural Gas (cu ft/hr) 300-750 - LP (cu ft/hr) 120-300
60-150 kW Liquid-Cooled - Natural Gas (cu ft/hr) 960-2061 - LP (cu ft/hr) 375-830

Please refer to the individual model’s specification sheet for exact figures.

Note: Figures are based on continuous operation at full load. It is unlikely that the generator will run at full load for an extended period, therefore, consumption decreases accordingly.

Emergency circuits should always be isolated by the emergency load center. An isolated sub-panel helps to prevent overload situations.

No. Because a 200-amp transfer switch is not necessary. The outputs of these generators are safely carried with a 100-amp automatic transfer switch.

Parts can be purchased through any Authorized GUARDIAN Dealer. They can also be ordered online through Order Tree at www.ordertree.com or by calling (877) 500-7499. Part numbers are located in the owner's manual.

Costs are determined by the installation and are based upon the model chosen and the requirements of the model. Cost will also vary based on hourly labor rates in your local area.

15W-40 is recommended for all liquid-cooled units. The oil should be a SAE rated high detergent oil that meets API Service Class SF requirements for gasoline engines.

GUARDIAN generators are made in the United States. Manufactured in Wisconsin by Generac Power Systems Inc., They design and build the complete product from the controls to the enclosures, to their air-cooled engines specifically designed for their generators. This ensures that their products are built to their highest standards.