Resources for Energy
|ENERGY SERIES: What about the Air Conditioning System?||
As you begin the process of selecting the most efficient air conditioning system for your home, investigate the critical issues of system size, placement, installation, and contractor experience. Your goal is to obtain an efficient system by: sizing the system for the specific cooling load of your home; selecting and properly installing the thermostats or controls; designing a ductwork system to deliver the correct amount of conditioned air to each space; and sealing and insulating all ductwork.
|Jun 9, 2014||2901-9001 (BSE-142NP)|
|ENERGY SERIES: What About Using Ceiling Fans?||
Ceiling fans create a breeze, so room occupants feel cooler and more comfortable. With a ceiling fan running, you can raise the thermostat setting by 2 to 4 degrees during the cooling season with no reduction in comfort. Increasing the room temperature by even two degrees can cut your cooling costs 4 to 6%.
|Jun 9, 2014||2901-9002 (BSE-117NP)|
|ENERGY SERIES: What About the Ductwork?||
Air distribution or duct systems are designed to supply rooms with air that is “conditioned”—that is, heated or cooled by the heating, ventilation, and air conditioning (HVAC) equipment—and to recirculate or return the same volume of air back to the HVAC equipment. Your duct system has two main air transfer systems: 1) supply, and 2) return. The supply side delivers the conditioned air to the home through individual room registers. The return side picks up inside air and delivers it to the air handler of your central system where heat and moisture are either removed or added and then delivered to the supply side. All of the air drawn into the return duct(s) is conditioned and should be delivered back through the supply registers.
|Jun 9, 2014||2901-9003 (BSE-118NP)|
|ENERGY SERIES: What about the Heating System?||
The efficiency of a gas (natural or propane) or oil furnace is measured by the Annual Fuel Utilization Efficiency (AFUE), which describes the heat produced from the energy used. This rating takes into consideration losses from pilot lights, start-up, and stopping. For example, a furnace with an AFUE rating of 80 converts 80% of the fuel it burns into usable heat. New furnaces usually rate in the mid-70s to low 80s, whereas older furnaces will be in the 50s or 60s. ENERGY STAR® qualified oil and gas furnaces have annual fuel utilization efficiency (AFUE) ratings of 83% and 90%, or higher, making them up to 15% more efficient than standard models. Unlike the Seasonal Energy Efficiency Ratio (SEER) and Heating Season Performance Factor (HSPF) ratings, the AFUE does not consider the unit’s electricity use for fans and blowers.
|Jun 9, 2014||2901-9005 (BSE-119NP)|
|ENERGY SERIES: What about Insulation?||
Insulation is rated in terms of thermal resistance, called R-value, which indicates the resistance to heat flow. Although insulation can slow heat flow—conduction, convection and radiation—its greatest impact is on conduction.
|Jun 10, 2014||2901-9006 (BSE-120NP)|
|ENERGY SERIES: What about the Laundry Area?||
The laundry room can be a big consumer of energy—more than 1,000 kilowatt-hours (kWh) a year—and water—and a big producer of unwanted heat and humidity in the summer. It makes good sense to think about both the location and the appliances in it if you want to run an energy-efficient laundry. And there are new washers and dryers on the market now that make it easier than ever to do so.
|Jun 9, 2014||2901-9007 (BSE-121NP)|
|ENERGY SERIES: What about Mold?||
Mold has received a lot of attention of late because of high profile lawsuits and television news broadcasts that have highlighted the potential hazards and liabilities associated with indoor mold. What is mold? Molds, along with mildews, yeasts, and mushrooms, all belong to the kingdom fungi. Fungi are unicellular or multicellular organisms that primarily use absorption as a means to obtain energy from their environment, unlike green plants, which use chlorophyll to obtain energy from sunlight. The term “mold” describes unwanted visible fungal growth. “Mildew” is fungi that grows on fabrics or that causes plant disease. The term “yeast” is fungi that are unicellular when cultured.
|Jun 26, 2014||2901-9008 (BSE-122NP)|
|ENERGY SERIES: What about the Water Heater?||
Heating water is the third largest energy expense in your home, after heating and cooling the entire space; and, it can account for 15-25% of your utility bill. It’s not hard to see why a family of four, each taking a 5-minute shower a day under inefficient showerheads, can use 700 gallons of water in a week representing a 3-year supply of drinking water for one person! There are several ways to cut down the amount you spend on heating water: a) insulate your water heater and pipes; b) reduce the amount of hot water you use; and c) turn down the thermostat on your water heater.
|Jun 26, 2014||2901-9009 (BSE-123NP)|
|ENERGY SERIES: What about Windows?||
The National Fenestration Rating Council (NFRC) offers a voluntary testing and certification program for thermal performance for windows and residential door products with glass. The NFRC does not conduct structural characteristics, such as impact-resistance, but rather serves as a complementary program that can test the whole window (including frame) for the following characteristics: U-Factor, Solar Heat Gain Coefficient (SHGC), Visible Transmittance, Air Leakage, and Condensation Resistance (see sample NFRC label) .
|Jun 30, 2014||2901-9010 (BSE-124NP)|
|ENERGY SERIES: What Are the Differences Between Mobile and Modular Homes?||
Mobile and modular homes are factory-built and generally differ in how much of the construction occurs at the factory. The greater the work at the factory, the less labor is needed where the home will be located.
|Jun 26, 2014||2901-9011 (BSE-125NP)|
|ENERGY SERIES: What Can Builders Do to Help Prevent Moisture Problems in New Construction?||
Buildings should be designed and built to provide comfortable and healthy levels of relative humidity. They should also prevent both liquid water from migrating through building components and water vapor from being trapped in building assemblies, like walls.
|Jun 26, 2014||2901-9012 (BSE-126NP)|
|ENERGY SERIES: What Does the Shape of the House Have to Do With Energy Efficiency?||
In a home, heat energy is transferred among all materials and substances that are of different temperatures—within the building materials, inside the building itself, and outside the building envelope. The term “building envelope” refers to all of the external building materials, windows, and walls that enclose the internal space. Heat moves only when there is a difference in temperature, and it always moves from the warm side to the cool side. Heat will continue to “flow” until any touching materials reach the same temperature. However, we usually want the inside of a home to have a different temperature from the outside.
|Jun 26, 2014||2901-9013 (BSE-127NP)|
|ENERGY SERIES: Estimating Appliance and Home Electronic Energy Use||
If you're trying to decide whether to invest in a more energy-efficient appliance or if you'd like to determine your electricity loads, you may want to estimate appliance energy consumption.
|Jun 26, 2014||2901-9014 (BSE-137NP)|
|ENERGY SERIES: What about Appliances?||
When shopping for appliances, remember that there are actually three prices to consider. The first is the one everyone considers: the purchase price. The second price is for repairs and maintenance. The third price is often forgotten, but equally important: the operating cost of the appliance. Operating cost depends on the cost of fuel (kilowatt-hour, cubic foot, therm, etc.) in your region, how much you use the appliance as well as the way you use it, and the overall energy efficiency of the appliance. Operating cost shows up on your utility bill each month for the life of the appliance. Your refrigerator, for example, may operate effectively for 15–20 years and your dishwasher for about 10 years. You'll need to consider how any given appliance will affect your utility usage.
|Jun 26, 2014||2908-9015 (BSE-128NP)|
|ENERGY SERIES: What about Caulking and Weather-Stripping?||
The greatest source of wasted heating and cooling energy in a home is air leaks. If you have a pair of 6' 8" exterior doors in your home that do not have weather-stripping, you can easily have an opening of ¼" all along the edge where the doors meet. This ¼" gap adds up to a 20-square-inch opening to the outside. If you saw a hole this big in your wall, wouldn’t you want it fixed?
|Jul 1, 2014||2908-9017 (BSE-130NP)|
|ENERGY SERIES: What about Dishwashers?||
It may come as a surprise that washing a load of dishes in the dishwasher uses less water than doing the same number of dishes by hand. (Dishwashers also do a better job of killing germs, because they use hotter water than you would normally use if washing by hand.) For each cycle, an ENERGYSTAR qualified dishwasher model uses about 4 gallons of water; a non-qualified model uses about 6 gallons.
|Jul 1, 2014||2908-9018 (BSE-131NP)|
|ENERGY SERIES:What about House Design and Room Location?||
While a good heating, ventilation, and air conditioning (HVAC) system and other energy saving features can provide you with a comfortable indoor environment, it is even more efficient to prevent heat from entering the house in the first place. By designing a house with the right shape and orientation, and strategically locating rooms, you can save on energy costs for cooling and heating. If renting or purchasing, look for these same features in an existing home.
|Jul 1, 2014||2908-9019 (BSE-132NP)|
|ENERGY SERIES:What about Moisture?||
Air is made up of a mixture of gases including oxygen, nitrogen, and carbon dioxide. It also contains water vapor—water in the form of a gas. The temperature of the air determines how much water vapor it can hold: warm air can hold more than cool air. When the air is saturated, it cannot hold any more, and any extra water vapor will condense into liquid form.
|Jul 2, 2014||2908-9020 (BSE-133NP)|
|ENERGY SERIES: What about Radiant Barriers?||
Reflective insulation systems are made from aluminum foils with a variety of backings such as roof sheathing, kraft paper, plastic film, cardboard, bubble wrap, etc. The resistance to heat flow depends on the direction of heat flow with this type of insulation most effective in reducing downward heat flow and requiring an air space next to the reflective side. Reflective systems are usually located between roof rafters, floor joists, or wall studs. Reflective insulation placed in walls or on the attic floor must be perforated to allow water vapor to pass through it.
|Jul 7, 2014||2908-9021 (BSE-138NP)|
|ENERGY SERIES: What about Refrigerators and Freezers?||
Your refrigerator is the only appliance that works continuously in your home 24 hours a day. In most households, the refrigerator is the single biggest energy consuming kitchen appliance. According to ENERGY STAR, replacing a refrigerator bought in 1990 with a new ENERGY STAR qualified model can save enough to pay for lighting an average household for nearly four months.
|Jul 2, 2014||2908-9022 (BSE-143NP)|
|ENERGY SERIES: What about the Roof?||
Roofing is more than shingles, tile, or metal. A roof system consists of several components, properly assembled to provide the appropriate shelter for a structure. These include structural elements, moisture barriers, and possibly insulation or ventilation.
|Jul 2, 2014||2908-9023 (BSE-134NP)|
|ENERGY SERIES: What about Ventilation?||
“Ventilation” is “the natural or mechanical process of supplying conditioned or unconditioned air to, or removing air from, any space.” “Infiltration” is the uncontrolled leakage of air through cracks and gaps in the building envelope, especially around windows and doors. Infiltration deals with uncontrolled situations. In our homes we want to be able to control air movement.
|Jul 7, 2014||2908-9024 (BSE-135NP)|
|ENERGY SERIES: What is the Whole-House Systems Approach to Energy Efficiency?||
The whole-house systems approach looks at the entire house as an energy system with interdependent parts. Like a human body, when one part functions poorly it affects the performance of the entire system. For instance, the benefits of an energy-efficient air conditioner are lessened when a duct system leaks, windows don’t close tightly, the attic is uninsulated, and humid summer breezes are drifting in under the door.
|Jul 7, 2014||2908-9025 (BSE-136NP)|
|Using the Energy Resource Guide for Virginia||May 1, 2009||354-501|
|Conserving Energy with Landscaping||
Well-placed plantings can significantly alter the microclimate around a home, resulting in a more comfortable environment and significant savings in heating and cooling costs over time.
|Apr 6, 2015||426-712 (HORT-110P)|
|Predicting Tractor Diesel Fuel Consumption||
Ability to predict tractor fuel consumption is very useful for budgeting and management. The objective of this factsheet is to develop relationships using field measurements and Nebraska Tractor Test Laboratory results to estimate tractor fuel consumption. Using these equations, farmers can estimate and compare the fuel consumption for different operating and loading conditions.
|Oct 14, 2014||442-073 (BSE-175P)|
|“Gear Up and Throttle Down” to Save Fuel||
“Gear-up and throttle-down” (GUTD) is a fuel-saving practice that can be used for saving fuel when drawbar loads are lighter (<75 percent of rated power) and PTO (power takeoff) speed can be reduced.
|Oct 9, 2014||442-450 (BSE-177P)|
Biodiesel is a renewable fuel that can be made from vegetable oil, animal fat, and recycled cooking oils. Oils produced from algae, fungi, bacteria, molds, and yeast can also be used to produce biodiesel.
|Jan 14, 2015||442-880 (BSE-180P)|
|Biomethane Production Technology||Dec 17, 2018||442-881 (BSE-240P)|
Greywater is any household wastewater other than that used for toilet flushing. This water could be reused around the home (for purposes other than drinking water). An example of greywater use is landscape irrigation. Wastewater that comes in contact with human waste is referred to as blackwater. However, the definition of greywater varies according to state regulations.
|Apr 30, 2014||BSE-114NP|
|Using Reclaimed Water||
Reclaimed water, sometimes referred to as “water reuse” or “recycled water,” is water recovered from domestic, municipal, or industrial wastewater treatment plants that has been treated to standards that allow it to be safely used for designated purposes. Reclaimed water should not be confused with “wastewater,” untreated liquid industrial waste or domestic sewage. However, “gray water,” untreated water from bathing or washing, is considered one form of wastewater (Water Reuse, VCE Publication 452-014).
|Apr 30, 2014||BSE-115NP|
|Rainwater Harvesting Systems||
Rainwater harvesting is the process of collecting, storing, and later reusing rainwater from surfaces such as roofs. Rainwater harvesting has long been used for agricultural irrigation and as a source of drinking water, and allowed ancient civilizations to flourish in semi-arid and arid regions. Rainwater harvesting systems are in use today in many water-limited locations, especially in several western US regions. As population growth increases pressure on water resources in the more humid eastern US, rainwater harvesting is being considered to reduce the demand for potable water.
|May 9, 2014||BSE-116NP|
|ENERGY SERIES: What about Landscaping and Energy Efficiency?||
Landscaping has always played an important role in modifying the home environment for thermal comfort. Throughout the history of civilization, housing has been designed to offer protection from the most severe conditions imaginable. Until the invention of mechanical cooling and heating systems, people relied heavily on their ability to modify their surroundings to deal with extreme climates.
|Jul 7, 2014||BSE-145NP|
|Harvesting and nutrient replacement costs associated with corn stover removal in Virginia||Feb 21, 2018||CSES-229NP|