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Magnetic ballast
An electrical device used to provide the starting voltage or to stabilize the current in an electrical circuit of a fluorescent lamp, which is not energy efficient, such as a T-12. (more)

A megawatt is a unit of measure of electricity or power and is equal to one million (1,000,000) watts.
Mercury is an element found naturally in the environment. Mercury emissions in the air can come from both natural and man-made sources. Coal fired power generation accounts for 51% of the mercury emissions in the U.S. Visit the EPA website for more information or find answers to their frequently asked questions.

A hydrocarbon gas that is the main ingredient in natural gas. (more)

Missouri Rebates and Incentives - Energy Efficiency and Renewables
The Department of Energy (DOE) has a database containing information for state, federal, local, and utility incentives that support renewable energy and energy efficiency. The DOE database website, called DSIRE, contains links to information on programs, incentives and tax deductions in your area. View Incentives/Policies for Renewables & Efficiency. For additional information on home energy audits, visit the Missouri Department of Natural Resources website.
Modulating burner
A modulating burner is a smaller burner used along with a main burner, or individually, to increase energy efficiency. A smaller modulating burner is mainly used during start up, or during very low heat demand and can be used to work along with the main burner. When demand is low, the smaller modulating burner may take the place in operation using less fuel while meeting the steam or water needs. (more)

Most Efficient label, ENERGY STAR
The U.S. Environmental Protection Agency (EPA) and U.S. Department of Energy (DOE) are now recognizing products as the most energy-efficient in their categories among those that have earned the Energy Star label. This "Most Efficient" pilot program continues Energy Star’s work to provide consumers with the best efficiency information so they can make investments that will lower their energy bills and environmental impact. It also aims to provide all manufacturers with an incentive for greater product energy efficiency while providing consumers new information about the products that comprise the top tier in respective categories. (more)

Motion Sensors
Devices that detect a specific condition and automatically adjust lighting or other electronic devices, based on preset conditions for a certain area. Motion sensors are typically used to reduce energy consumption when used as occupancy sensors or in security applications for lights, cameras, alarms, etc.  (more)

Motor sizing, efficiency, and design can have a big impact on lifetime operating costs. Premium efficiency motors are 3% to 8% more efficient than standard models. A variety of designs are available to fit the demands that motors must meet. (more)

Motor - electrically commutated
Electrically Commutated Motor, known as an ECM, is also called a brushless (BL) motor or brushless direct current (DC) motor. This type of DC electronic motor uses an electronic commutation system as it maintains a stationery magnet, or stator, in a constant polarity, while rotating magnet or rotor switches from north to south to south to north changing polarity to keep the rotor turning. It is powered by direct current and does not make use of brushes or any other type of mechanical commutator. (more)

Motor, swimming pool
A swimming pool pump is one of the largest energy users in the home. You can reduce a pool pump's energy usage by replacing the pump with a smaller or more efficient model or setting your existing pump to run less frequently. (more)

Motorcycles, electric
Electric motorcycles are battery powered and capable of achieving speeds over 85 miles an hour. Some electric motorcycle power packs have been designed to last the life of the motorcycle and exceed a distance of over 100 miles on each charge. Check with your local motorcycle dealer for more information. (more)

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Natural gas
A fossil fuel found deep in the earth. Natural gas is often found with oil.

Natural gas insert
An insert is a metal box placed inside an existing fireplace that helps increase efficiency. Fireplace inserts may have glass doors allowing the flames to be viewed while the doors remain closed. Air enters through vents below, moving around the main chamber. The air heats up and exits through vents on the top of the unit. (more)

Natural gas vehicle (NGV or NG vehicle)
A natural gas vehicle, or NGV, is an alternative fuel vehicle that uses compressed natural gas (CNG) as a clean alternative to other automobile fuels. (more)

Net metering
Net metering is an approved process by the Missouri Public Service Commission. A net metering customer is defined as an individual who uses his/her own renewable system to generate a portion or all of his/her electricity. Net metering is the method of metering how much renewable generation is available on the grid and how much the customer used. (more)

Net zero home
A Net Zero Home is a term describing a home with zero net energy consumption and zero carbon emissions annually. (more)

Nonrenewable fossil fuels
Fuels that can be used up because they cannot be easily made or “renewed. ” Oil, natural gas, and coal are nonrenewable fossil fuels.

Nuclear energy or nuclear power
Energy that is released from splitting atoms of radioactive materials (such as uranium) and then harnessed to generate electricity.

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Occupancy sensors
An electronic switch device used to sense movement and turn on and off lighting in areas where lighting is not needed for extended periods of time. (more)

Outlet cover insulation
This type of insulation seals drafts from coming in through your wall outlets and light switches. Preventing these drafts will increase comfort and reduce energy used for heating and cooling. The insulation is available at your local home improvement retail store. Visit the U.S. Department of Energy website for more information. (more)

Outside/security lighting
Effective outdoor lighting is important for security, to illuminate an area or to enhance visibility to a facility. The wrong fixtures and lamps may not be energy efficient. Security lighting can be used from dusk to dawn. (more)

Oven, convection
A convection oven cooks similar to a conventional oven. The heat is generated by either electricity, natural gas, or propane, and all types of food can be prepared.The main difference between a convection oven and a conventional oven is that the hot air inside a convection oven is circulated by a fan to evenly distribute the heat around all the food. Even distribution allows more even cooking, ability to lower cooking temperature, and shorter cooking time saving energy. (more)

Oven - food service
Convection ovens are the industry standard due to faster cook-times produced by increased hot air movement inside the oven cavity. In addition, convection ovens are now eligible for ENERGY STAR qualification. (more)
Energy Information - Terms M, N, O
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