January 28th, 2010 | 
Author: Below are some terms you will encounter while researching energy related merchandise, heating and potency:
AFUE (annual fuel utilization efficiency): an potency rating that measures the potency with that gas and alternative fossil-fuel-burning appliance use their primary fuel supply over a complete heating season. It does not take under consideration the efficiency with that any element of the system, like a furnace fan motor, uses electricity. AFUE is expressed as a percentage that indicates the common number of Btu value of heating comfort provided by each Btu value of fuel consumed by the system. For instance, a gas furnace with an AFUE of 80% would supply 0.eight Btu of heat for every Btu of natural gas it burned.
Air infiltration: the introduction, usually unintentional, of unconditioned outdoor air into a mechanically heated and/or cooled building. Air infiltration will occur through any opening in the home’s structure, together with seams where walls meet other walls, window or door frames, or chimneys; holes where wires or pipes penetrate walls, floors or ceilings/roofs; and between the loose-fitting meeting rails of double-hung windows or a door bottom and door threshold. It’s one amongst the main causes of unwanted heat gain and loss, and private discomfort in buildings.
Alternating Current (AC) – An electric current that reverses its direction at regular intervals or cycles; In the U.S. the standard is one hundred twenty reversals or 60 cycles per second; usually abbreviated as AC
Amp – short for “ampere” – this measures the quantity of electricity moving through a wire. Most household appliances use 15 or twenty amps of power. Amps are what offer electricity its “shock.”
Biomass Fuel: Any organic (plant or animal) material that is available on a renewable basis, together with agricultural crops and agricultural wastes and residues, wood and wood wastes and residues, animal wastes, municipal wastes, and aquatic plants
BTU (British thermal unit): a measurement of the energy in heat. It takes one Btu of warmth to warm one pound of water by 1° Fahrenheit. Btu can be used either to define an air conditioner’s cooling capability (i.e., the amount of Btu of warmth that may be removed by the system) or a furnace’s heating capacity (i.e., the quantity of Btu of warmth that may be supplied by the system).
Chemical Energy – Energy stored in a substance and released throughout a chemical reaction such as burning wood, coal, or oil.
Combustion – Chemical oxidation in the course of the generation of light and heat.
Conduction is the transfer of heat through solid objects like glass, dry wall, brick and alternative building materials. The larger the difference between the outdoor and indoor temperatures, the faster conduction can occur, increasing a building’s energy gain or loss.
Convection is the transfer of heat to or from a solid surface via a gas or liquid current. Where home heat loss and gain are concerned, heat convection is caused by air (gas) currents that carry heat from your body, furniture, interior walls and alternative warm objects to windows, floors, ceilings, exterior walls and alternative cool surfaces.
Conversion- A variety that translates units of 1 measurement system into corresponding values of another measurement system.
Twine of Firewood: a tightly stacked pile of wood logs measuring four’ x four’ x 8′ (128 cubic feet).
Daylighting is that the technique of using natural light-weight from windows, skylights and alternative openings to supplement or replace a building’s artificial lighting system. When applied properly, daylighting can reduce lighting costs. When applied improperly, but, it can not only cause inappropriate light-weight levels however can also raise the building’s cooling costs by introducing high levels of solar heat into the interior of the building. Also see SOLAR GAIN to determine how daylight will affect heating costs.
Direct Current – An electric current that flows in solely one direction through a circuit, as from a battery.
Efficiency is that the degree to that a sure action or level of labor will be effectively made for the least expenditure of effort or fuel. BTU of energy consumed (input) x efficiency = BTU output.
Energy: The flexibility to do work or the power to move an object. Electrical energy is sometimes measured in
kilowatthours (kWh), while heat energy is sometimes measured in British thermal units (Btu).
Energy Efficiency – Refers to activities that are aimed at reducing the energy utilized by substituting technically a lot of advanced equipment, sometimes without affecting the services provided. Examples include high-efficiency appliances, efficient lighting programs, high-efficiency heating, ventilating and air con (HVAC) systems or control modifications, efficient building style, advanced electric motor drives, and warmth recovery systems.
Emission- A discharge or something that’s given off; generally employed in regard to discharges into the air. Or, releases of gases to the atmosphere from some type of human activity (cooking, driving a automotive, etc). Within the context of worldwide climate modification, they comprises greenhouse gases (e.g., the release of carbon dioxide throughout fuel combustion).
Heat Content – The gross heat content is the quantity of British thermal units (Btu) made by the combustion, of a volume of gas underneath sure with air of the identical temperature and pressure because the gas, when the merchandise of combustion are cooled to the initial temperature of gas and air and when the water shaped by combustion is condensed to the liquid state.
Kilowatt-hour (kWh): one thousand watts used for one hour – or any combination of energy multiplied by time that’s adore that rate of electrical consumption, like one watt used for a thousand hours, ten watts used for 100 hours, or 50 watts used for 20 hours. For example, a 100-watt light bulb left on for five hours every day would consume one kWh every 2 days. Kilowatt-hour is the primary measure on which U.S. electrical firms base most customer billing.
Load Estimate is series of studies performed to determine the heating or cooling requirements of your home. An energy load analysis uses data such as the sq. footage of your home, window and door areas, insulation quality and local climate to work out the heating and cooling capacity required by your furnace, heat pump or air conditioner.
Mercaptan – An organic chemical compound that features a sulfur like odor that’s added to natural gas before distribution to the patron, to present it a definite, unpleasant odor (smells like rotten eggs). This is a security device by allowing it to be detected in the atmosphere, in cases where leaks occur.
Methane -A colorless, flammable, odorless hydrocarbon gas (CH4) that is the major component of natural gas. It’s also an vital supply of hydrogen in various industrial processes. Methane may be a greenhouse gas.
Operating Value is the day-to-day cost of operating an appliance, based on energy use.
Payback period is the amount of time it takes to realize a full come back on an investment. For example, if a high-potency direct vent gas hearth prices $a thousand a lot of than a purely ornamental fire however would save $five hundred a year in gas usage, the payback amount is 2 years.
Propane (C3H8) – A normally gaseous straight-chain hydrocarbon. It’s a colorless paraffinic gas that boils at a temperature of -43.sixty seven degrees Fahrenheit. It is extracted from natural gas or refinery gas streams.
Radiation could be a technique of heat transfer in which heat is transmitted from surface to surface via infrared waves. Radiant heat warms the surfaces it touches without increasing the temperature of the air through that it travels. All warm bodies radiate infrared energy.
R-price could be a measurement of a material’s ability to resist heat transfer. Insulation product are rated consistent with the R-value. The higher its R-price, the larger the product’s ability to resist heat flow will be.
Solar Gain is the warmth that builds up within a structure as a results of sunlight that enters through transparent or translucent surfaces, like windows, and is converted to heat once putting different surfaces within the building.
Area Heating – The employment of energy to generate heat for heat in housing units using house-heating equipment. The equipment could be either the first or secondary supply of heating.
Thermal Energy – The overall potential and kinetic energy associated with the random motions of the molecules of a material.
Thermostat – A device that adjusts the quantity of heating and cooling created and/or distributed by automatically responding to the temperature in the environment.
Watt: a unit of electrical power. The amount of power required by electric appliances is expressed in watts. Watt-hour is a unit of electrical energy, equal to at least one watt used over a amount of one hour.
Volt (V) – The volt is the International System of Units (SI) measure of electrical potential or electromotive force. A potential of one volt appears across a resistance of 1 ohm when a current of one ampere flows through that resistance. Reduced to SI base units, 1 V = 1 kg times m2 times s-3 times A-1 (kilogram meter squared per second cubed per ampere).
Voltage – The difference in electrical potential between any two conductors or between a conductor and ground. It is a measure of the electric energy per electron that electrons can acquire and/or provide up as they move between the two conductors. This is how electricity gets from the facility plant to your house: high-voltage transmission lines carry the electricity beneath larger pressure to hold it long distances, while lower-voltage power lines serve individual homes and businesses.
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