Tuesday, September 28, 2010

Easy Install Guide and recommended insulating foil to Achieve a U value of 0.16

The need for insulation foil

When properly installed, the insulation reduces the heat transfer through the building envelope. If ever there was a temperature difference, heat flows naturally from a warm area to a cooler area. To maintain comfort in winter, heat is lost must be replaced by heating and summer, the heat gained must be removed from the cooling system. Statistics show that 50% to 70% of the energy used in the average home in the United Kingdomfor heating and cooling. It makes sense to use the thermal insulation to reduce energy consumption while increasing comfort and saving money. Naturally, less consumption of fossil fuels and energy from the load lighten our eco-system must meet.

To summarize, insulation of the building `s conditioned room makes these important points:

It provides a much more comfortable, productive and enjoyable. In addition, the effects of moisturecondensation and displacement of air are minimized in well insulated buildings. This translates into lower maintenance costs and greater longitivity building.
Reduces the demand for energy, a lower electricity bill.
Support cost savings, environmental and energy. This is evidenced by several studies sponsored by the Energy Commission.

The heat moves through the wall cavities or between roofs and attic floors by radiation, convection and conductionradiation is the dominant mode of heat transfer. A reflective insulation is an effective barrier against radiant heat transfer v, because it reflects most of the infrared radiation strickeing the surface and very low heat conducted through it. Based on its impermeable surface, reflective insulation also reduces convective heat transfer. Mass insulation such as glass fiber, polyisocyanurate (PIR) rigid foam insulation board or mineral wool, especially slow heat flow, convection, and eliminatingreduce some radiation. reflective insulation makes for a drastic reduction in the flow of heat radiation and some convection. Spray foam and polyisocyanurate boards may provide greater resistance to conductive transfer until the gas cell is lost or diluted with air usually for a period of 15 years.

What is Radiant Barrier Reflective Insulation? Radiant barrier insulation is a reflective insulation system that offers a permanent energy costs. Radiant Barrierinsulation systems reflect radiant heat energy instead of trying to absorb. A pure aluminum radiant barrier reflective insulation is unaffected by humidity and will continue to play at a constant level, regardless of how wet. A radiant barrier insulation system is a sheet in front of an airspace and is installed in the building envelope.

Most people are familiar with traditional insulating materials such as fiberglass, cellulose, Polyiscyanuratepanels, polystyrene and rock wool. These products use their ability to absorb or resist (slow down) convective and conductive heat transfer to insulate (R-value). A third form, but rarely discussed dominant heat transfer exists: radiant heat transfer. What are the differences between the three forms of heat transfer? Conductive: Direct contact. If you touch a pot on the stove, this is conductive heat transfer. Convective: Steam, moisture. If the hand above a boiling pot, youheat in the form of steam. These convective heat transfer.

Radiant: Electromagnetic. Step outside on a sunny day and feel the sun on your face. Do you feel the radiant heat transfer. All objects above absolute zero (-459.7 degrees Celsius) emit infrared rays in a straight line in all directions.

A radiant barrier reflects radiant heat energy instead of trying to absorb. What does this mean in your home or business? During the winter, 50-75% of heat loss through theCeiling / roof system and 65-80% of heat loss through walls is radiant. In summer, 93% of heat gain is radiant. If depends on the value of R (resistance) alone to insulate against heat gain and loss, remember that traditional forms of insulation are virtually transparent to radiant energy and are affected by changes in humidity (moisture). A 1-1/2% change in moisture content of fiberglass insulation will result in a reduction of 36% in performance(Referred to as HVAC Manual 10.6; McGraw-Hill). A pure aluminum radiant barrier is unaffected by humidity and will continue to play at a constant level, regardless of how wet.

Concept of reflective insulation

Different types of insulation products to reduce the heat transferred by conduction, convection and radiation in varying degrees. As a result, each offering different thermal performance and its "R" values. The primary function of reflective insulationreduce the radiative heat transfer across open spaces, significant contribution to earnings in the loss of heat in summer and warm in winter. The low emissivity of metal surfaces FOI product blocks up to 97% of the radiation and therefore a significant part of heat transfer. There are many types of materials that reduce heat gain and heat loss. Some materials provide greater resistance than others, depending on the mode of heat transfer: convection or radiation. Most insulation materials work onprinciple of trapped air, gas is a good insulator. layers of insulation mass, such as fiberglass, foam and cellulose fiber glass, plastic and wood fiber, respectively, convection, and thus reduces the reduction of heat transfer. These materials also reduce heat transfer by conduction due to the presence of trapped air. (However, these products, as most construction materials have a very high radiant transfer.) Heat flow by radiation is brought to the public `s attention with highefficiency windows, which often use the term "low E" to advertise the higher performance evaluations. This value is measured in emitance or "and" values ranging from 0 to 1 (low value "E" indicates better performance). Most building materials, including fiberglass, foam and cellulose are "E" values greater than 0.70. Reflective insulation typically have "E" values of 0.03 (again, lower is better). Therefore, the reflective insulation is superior to other types of insulating materialsreduce the flow of heat by radiation. The term reflective insulation in some ways a misnomer, since aluminum or polyester, and works to reflect heat (reflectance of 0.97) or by radiant heat (emitance of 0.03), or emitance or reflectivity, the performance (heat transfer) is the same. As reflective insulation is installed in wall cavities, air-drop (like other insulation materials), and then reduce the heat flow and convection in response to both modes of heattransfer. In all cases, the reflective material next to a layer of air. Film, when placed between two pieces of plywood, for example, the heat in a fast pace.

The UK regulations require us to reach the insulation value of 0.16 AU has to offer, this can be achieved by using more of our films in co-junction with fiberglass or polyisocyanurate (PIR) board.To provides more detail would be advisable to consult your local buildingspecifying what they need, as we have seen many municipalities differ from the specifications. We would recommened the following specifications and have many excellent reports on the work undertaken throughout the UK and France. If this is an isolation of more and get a job creating a warm roof, would polyisocyanurate board of 70 mm or 100 mm of glass wool between the rafters of its use, cover the face of the trusses with a padded lining, it is recommended film Actis Super 10, Super 19, or Aluma FlexAluthermo Quatro. all these materials we stock for immediate shipment. If the movie you really want to get a value somewhere between U, 18 -, 20, which is quite acceptable on a renovation project. I f the tiles have been removed is foil insulation above the rafters and the counter mode was to be introduced and a membrane to cover these batons and tiles. The most important aspect of a piece of insulating airspace between 25 mmand any film coating material, will provide the heat transfer, with the advantage that it eliminates the reflection from the surface of the paper. Bubble Wrap is a fun low-cost way to share large insulate your house, very popular in the U.S. and is known as house wrap, low cost and very effective way to maintain calm in the house months Sumer, and heat retention in winter.

Related : Ceramic Space Heater

1 comment:

  1. Fine systems to install. The ventilation system plays a vital role to the building.If you are qualified to install the unit yourself you can save even more money.