Asbestos Essentials is a task manual for building, maintenance and allied trades on how to safely carry out non-licensed work involving asbestos. For advice on when and how you should use these sheets make sure you printout and read AO - Advice on Non-licensed work with Asbestos. Equipment and method sheets Work with asbestos cement (AC) (non-licensed) Working with textured coatings (TC) containing asbestos (non-licensed) Strictly controlled minor work on Asbestos Insulating Board (AIB) Safe work with undamaged asbestos materials Removal and replacement of other asbestos containing materials Nationwide Maintenance specializes in all types of roofing installation, including complex commercial roofing projects. We understand the diversity of the commercial roof systems. We realize your business needs to keep operating during the roofing process. We minimize our obstruction to parking facilities and entry ways to keep your operations flowing smoothly.

Commercial roofing ranges from a small business office to a colossal industrial manufacturing plant. Roof types are either Pitched, or Flat (low slope) Commercial flat roofs present many obstacles you will not find on a pitched roof. There are other obstacles that you encounter on commercial roofs like Building ventilation system, large AC units, etc, along with numerous vent piping and other protrusions. Not only are these obstacles, they can also be, depending on the roofing material used, a source of continued maintenance expense. Most residential homeowner's desire is a roof that will last a long time, but won't cost a fortune to install. Most residential roofs are replaced, or at least repaired, every 15-20 years. By carefully choosing your residential roofing material, you can help reduce the cost of replacement or push it far into the future. In the long run, you'll use less building material, fill up less landfill space with discarded material, and put less demand on our natural resources.

Perhaps most importantly, Nationwide Maintenance will always offer fair estimates and successful installations. Here at Nationwide Maintenance we offer Re-roofing, Roof Repair, Maintenance, and Roof Inspections. Re-Roofing is the process of installing a new roof when a roofing system fails. Roofing system failures can be caused by a number of factors, including age, severe weather, poor workmanship, defective materials, and improper specification of a roofing system, abuse and failure to maintain the roof via inspections. Roof Repair is a process where an existing roofing system has additions and adjustments made to it, such as caulking, re-roofing and repairing penetration to fix leaks in the roofing system Maintenance involves the physical inspection of an existing roofing system to determine its current condition, detect weakness and failures and identify any potential future problems Roof Inspections provides a baseline examination of an existing roof condition

Siding is the most cost effective way to protect your home from the elements, save on energy costs, and attain the satisfaction that comes from knowing you will never have to paint again! hvac unit 17 review questionsPlus . . . ac unit running in reverseNew siding adds "Curb Appeal" while reducing energy costs.cost of ac compressor unit 4 times more insulating power 45% more noise reduction Guaranteed to let your home breathe 300% more impact protection Seal out dust and dirt from outside Reduce noise from the outsideDometic Brisk Air Replacement Shroud, Polar White Dometic Penguin A/C Shroud, Polar White Dometic Penguin Replacement Shroud, Polar White Elements Air Conditioner Cover for Dometic Penguin

Elements Air Conditioner Cover for Dometic Brisk HP Elements Air Conditioner Cover for Coleman Mach Elements Air Conditioner Cover for Coleman Mach PL Overdrive RV AC Cover, Black, for Coleman Mach I, II, III, 3 Plus, TSR, Roughneck Tuff/Maxx Replacement Air Conditioner Shroud - Polar White Dometic Brisk Air A/C Shroud, Polar White Deluxe Free Delivery Heat Pump Ceiling Assembly Penguin II Replacement Shrouds - Black Coleman-Mach Mach 8 Electric Heating Element Overdrive RV AC Cover, Gray Airfitness Electrostatic Filters - Fits Duo-Therm Rooftop Air Conditioners Overdrive RV AC Cover, Black, for Duo Therm, Brisk Air, Quick Cool Coleman A/C Shroud, Polar White Overdrive RV AC Cover, Black, for Dometic Brisk II Ventmate Air Conditioner Gasket 14 x 14 Air Distribution Box for use with Wall Thermostat, Whitedescription The requested resource is not available.Sign in to follow this , August 15, 2009 15 posts in this topic

Create an account or sign in to comment You need to be a member in order to leave a comment Sign up for a new account in our community. Register a new account Already have an account? Sign in to follow thisScience of Summer: How Does Air Conditioning Work? Editor's Note: In this weekly series, LiveScience looks at scientific aspects of the summer season. As August heats up around the country, for many, summer's swelter will mercifully be kept in check by air conditioning. The technology has had a profoundly comforting impact on modern life, and about 87 percent of American homes these days have some form of air conditioning, according to the Energy Information Administration. So how does a typical air conditioning unit work and keep you sane during the heat of summer? The basic concept is that a chemical called a refrigerant loops from inside the home to outside and back again, absorbing and casting out heat in the process. The refrigerant cools and then re-enters the home, starting the cycle anew, explained Glenn Hourahan, senior vice president at the Air Conditioning Contractors of America.

Hourahan said that the two refrigerants commonly used in residential air conditioners are R-22 and the newer R-410A, both of which are chemically known as hydrochlorofluorocarbons, or HCFCs. These chemicals go back and forth from a liquid to a gaseous state very easily, and it is these so-called phase transitions that make HCFCs so useful as refrigerants. A common phase transition we've all seen is when liquid water is heated and evaporates into a gas, or water vapor. The same goes for the refrigerant: it absorbs heat in its liquid state, transforming into a gas. The refrigerant is then forced to return to being a liquid, expelling the heat it absorbed and thus made ready to soak up heat once again. [The Mysterious Physics of 7 Everyday Things] An air conditioning breakdown An air conditioning system essentially has four parts, said Hourahan: an evaporator, a compressor, a condenser and an expansion device. The part inside the home where the refrigerant evaporates is the evaporator, naturally.

Fans in the home blow air across the evaporator's coils. "As air from the house moves across the evaporator, refrigerant within the coil picks up the temperature of the air," said Hourahan. "The refrigerant is absorbing heat from the air and turns from a liquid to a vapor. It went from being a cold liquid to a hotter vapor, and at the same time, the air had heat removed from it, so the air went from being warmer to colder." The vaporized refrigerant then passes into the compressor, which is located outside in the air conditioning unit adjacent to a home (or often on the roof of a business), along with the condenser. As the name implies, the compressor compresses the gas to a state of higher pressure and higher temperature. From there, the hot, pressurized gas flows over the third component, the condenser. Here, the gas is condensed back into its liquid state as heat is radiated away. Outdoor units often have metal fins on them to help dissipate the heat more quickly. The cooled-off liquid is now returned into the home.

The expansion device regulates the flow of liquid refrigerant into the evaporator, where just as before it will absorb heat and change phase from a liquid into a low-pressure gas. Removing heat is not all that an air conditioner does as it, ahem, conditions the air. Humidity — the amount of water vapor in the air — is a major factor in how our bodies feel the heat; a more humid environment prevents sweat from evaporating off the skin, which helps to whisk away unwanted bodily warmth. [7 Common Summer Health Woes] So, in order to render the environment inside a home or business more comfortable, air conditioners also dehumidify. "As the air moves across the evaporator coil, the coil absorbs heat and also wrings out moisture," said Hourahan. "The air now has a cooler temperature and is drier, so when it comes out of the registers [vents], it mixes with room air and makes the room more comfortable." All that water leached out of the air by air conditioners can pool in or drain out of the unit, especially on humid days.