Thermal insulation reduces heat flow from one surface to another. Duct insulation hvac duct xlpe insulation distributor. Ap armaflex is the ideal choice for duct wrap or duct liner. Astm c38 standard test method for determining fungi resistance of insulation. Ap armaflex can be used in new construction or in insulation. Ductwork insulation minimum material rvalue bca 20 2. Origins and paths of sound transmission in installations 26 4. Ducts insulated with closedcell spray foam in an attic. The higher performing house with higher levels of insulation, more energy efficient windows, reduced air infiltration, and controlled mechanical ventilation has a lower load, and consequently less air volume is needed to condition the space.
There are certain components that help make duct systems more efficient at distributing the air. Lowvelocity ductwork design is very important for energy efficiency in air. For most single family work, the insulation must meet the levels shown in the following table. Using the proper insulation material, thickness, installation procedure and. In commercial buildings, air ducts are routinely used to distribute conditioned air to the various zones within the building. Available in sheets and rolls, in regular or selfadhering material, this closedcell foam insulation requires no additional vapor barrier and meets. The word insulation derived from the latin word for island insula is the noun describing material which insulates cuts off heat or electricity from its surroundings. How to insulate hvac heating and cooling ductwork today. Sealing and insulating of ducts in existing homes nrel. In its simplest form, duct lining traditionally fiber glass, would be installed in rectangular ducts as part of an automated process while the duct is being.
Diffuser board, duct liner pm, fitting fab board, linacoustic rc, linatex, microaire, microaire lp, microlite standard, permacote linacoustic r300. Fiberglass duct insulation training flyer a duct system is a collection of tubes that distributes heated or cooled air to various rooms in a building. Insulated hvac ductwork will increase efficiency, reduce energy cost and improve indoor air quality. Fibrous glass insulated hvac duct systems 4 sheet metal ducts with exterior fibrous glass exterior insulation flexible blanket fibrous glass duct wrap insulation is designed for application to the exteriors of commercial and residential sheet metal heating, ventilating, and airconditioning ducts and plenums operating at temperatures between 40. Therefore, this study is devoted to determining the most effective thermal insulation thickness material for hvac duct. Ap armaflex sa black duct liner is a patented nonfibrous duct liner with an advanced, pressure sensitive adhesive system for nonpinned field applications. Overview of insulation materials overview of insulation materials abstract substantial quantities of heat energy are wasted daily in industrial plants and buildings because of uninsulated, under maintained or under insulated heated or cooled surfaces. Use the type of metallic foil duct tape recommended by the insulation manufacturer to seal and hold the insulation in place. Exterior hvac duct insulation service improve energy efficiency and reduce power costs, withstands harsh weather. The hvac insulation you use has a dramatic impact on the final efficiency of the system you are installing. Additional purposes for duct insulation are energy conservation and iaq control.
Knauf insulation eclipse air duct board offers excellent acoustic and thermal characteristics which make for quiet, efficient air delivery. Fiberglass ductwrap is a thermal and acoustical insulation for wrapping commercial and residential interior hvac. Fresh air ducts will focus on the fresh air in your. After installation, and prior to occupancy, blow out duct system to remove any cutting scraps or foreign material remaining in the duct. Technical insulation product selection guide certainteed. Because hvac systems directly control your heating and air conditioning, proper insulation can pay off. Inside the back cover of this book youll find a software download certificate. Lining insulation thermal and sound absorbing material. R6 value meets or exceeds most energy codes and helps reduce energy. Softtouch duct wrap insulation offers outstanding thermal properties that reduce unwanted heat loss or gain and condensation during system operation. While duct liners certainly play an important role in providing thermal and acoustical insulation for hvac systems, duct coverings or duct wraps also provide important alternatives. Fibrous glass insulated hvac duct systems 3 sheet metal ducts lined with fibrous glass insulation fibrous glass duct liner insulation is designed for application to the interiors of commercial. How to insulate hvac heating and cooling ductwork todays.
This standard is intended to provide useful information to the professional service provider psp to establish a basis of design. The board consists of insulation materials made of glass fibers and bonded with a special resin. Knauf insulation atmosphere duct liner is a flexible, matfaced insulation bonded with ecose technology. Fiberglass duct wrap insulation to reduce condensation in, absorb noise from and improve the air temperature efficiency of your duct system. Unitherm ceramic fiber insulation blanket, rvalue 2. There are certain components that help make duct systems. Nfpa 90a and 90b require that duct lining materials comply with test methods defined in astm c411. Consortium for advanced residential buildings carb.
It is a scientific noun and was first recorded in 1870. Large hvac systems typically do not need internal duct lining, as noise is controlled by sound baffles or external acoustical insulation at the source in the mechanical room. In fact, sheet metal use in hvac is greater than all other materials combined. A comprehensive duct layout indicating sizes, design airflows, pressure class, and routing of the duct system. Certainteed has helped shape the building materials industry for more.
All of the materials that are necessary for insulating hvac ductwork with insulation board including the fiberglass or mineralwool duct board, pins and fasteners, aluminum cladding, and tapes. Lowvelocity design will lead to larger duct sizes, but it may be worth since, doubling of duct diameter. Products like insu shield are the latest entrant in duct insulation segment which are. Hazards problems associated with fiberglass duct liner and. It appears the hvac contractor ran out of the proper sized ducts or collars for this. Ufgs 23 07 00 thermal insulation for mechanical systems. Attenuating noise carried through ductwork is a vital function of a duct liner insulation material to help create productive living, work and learning environments. There are exceptions for return ducts in basements and ducts or pipes. Ecofoil r8 hvac duct wrap insulation is very durable, yet clean, lightweight and flexible.
In its simplest form, duct lining traditionally fiber glass, would be installed in rectangular ducts as part of an automated process while the duct is being fabricated on a full coil line. Use the type of metallic foil duct tape recommended by the insulation manufacturer to seal and hold the. Choosing quality supplies and the proper hvac cover materials are crucial when designing a. Big offers exterior hvac duct insulation service for new construction, retrofit and. Ducting may be categorized according to the materials of construction and are either metallic or nonmetallic ducts.
Climaver glass wool ductboards these are ducts made from high density glass wool board. Hvac ducts handbook sustainable insulation solutions. When insulating hvac ductwork, use a foil faced fiberglass insulation with an r6 or higher rvalue. The higher performing house with higher levels of insulation, more energy efficient windows, reduced air. Insulation can also be installed on the inner wall of the duct duct liners, as glass wool duct wraps or duct slabs faced with a glass matting or mesh providing acoustic insulation and strengthening the. Duct liner pins that mechanically attach, weld, or adhere to the sheet metal, and have a shank length that is equal the thickness of the insulation must be used. Large hvac systems typically do not need internal duct lining, as noise is controlled by. When you think of metal ductwork, you may think about those noisy booms and cracks that come with it.
These duct systems carry heating, cooling, andor ventilation air from a central location to the zones with the objective of providing for the health and comfort of the building occupants. Resin used shall be the hetron 197 for its fire retardant and corrosion resistant properties. Insulation can also be installed on the inner wall of the duct duct liners, as glass wool duct wraps or duct slabs faced with a glass matting or mesh providing acoustic insulation and strengthening the inner face of the duct. Fresh air ducts will focus on the fresh air in your air conditioning system. Fiberglass insulation shall not be used in the hvac systems, including the supply and return air plenums. Highvelocity hv duct systems are characterized by air velocities in the range of 2500 to 3500 fpm. We are the market leader in hvac insulation, and have a. Hvac insulation for heating and cooling ductworks knauf. This blankettype insulation is used to insulate rectangular and round heating, ventilating and air conditioning ductwork. A guide to insulated hvac duct systems insulation institute. These recognise that well insulated buildings that control heat and cold, along with good acoustic insulation are important elements of good building design. The types of fittings to be used based on the designers calculations of fitting losses i. Hvac duct wrap insulation ecofoil reflective insulation. Common duct insulation materials supplement f wsu energy.
The acoustical properties of hvac ducting insulation can help absorb these operational noises, minimizing sound transfer. Thermal insulation is defined as a material or assembly of materials used to provide resistance to heat flow. Do you have a project that requires ecofoil r8 hvac duct work insulation. You will need less material than you would for a rectangular or a square duct.
It is easy to install and safe to handle with no special clothing or breathing equipment. Ansismacna 0062006 hvac duct construction standards. Products like insu shield are the latest entrant in duct insulation segment which are providing optimum efficiency with ease in application. Hvac insulation material elastomeric nitrile rubber tube. Choosing the best insulating duct materials for your air.
Table f1 shows what the rvalues are for varying thicknesses and types of duct insulation in a better layout than table 511. Being the leading names in the industry, we offer an extensive range of duct as well as pipe form xlpe xpe insulation that is acclaimed among. The majority of ducts are constructed of metal and installed by tradesmen called sheet metal workers. Fiberglass ducts are made from 1, 112, or 2inchthick boards that are grooved with a tool and folded into ducts. Ordinary heating, ventilating, and air conditioning duct systems read air pressures at 0. Lowvelocity ductwork design is very important for energy efficiency in air distribution systems.
Big offers exterior hvac duct insulation service for new construction, retrofit and repair projects. Isover provides a complete range of insulation solutions for hvac ducts, pipes and. Chemically cross linked polyethylene insulation also known as xpe or xlpe insulation is new age widely used insulation material in hvac industry as well as for plumbing and hot water pipe insulation. For most hvac applications, sheet metal ducts are used to deliver conditioned air to. Fibrous glass insulated hvac duct systems 3 sheet metal ducts lined with fibrous glass insulation fibrous glass duct liner insulation is designed for application to the interiors of commercial and residential sheet metal heating, ventilating, and airconditioning ducts to attenuate noise generated by central air handling. It is faced with a tightly bonded mat to give the airstream a smooth, tough surface, resisting damage during installation and operation. Available in sheets and rolls, in regular or selfadhering material, this closedcell foam insulation requires no additional vapor barrier and meets the stringent flame and smoke testing required for use in air plenums. If so, please feel free to give us a call at 888 3493645 or send us an email to. This will carry all of the conditioned air and disperse it back into the system. It is manufactured with glass fibers bonded together with a.
Hazards problems associated with fiberglass duct liner. Ap armaflex sa black duct liner wrap also meets requirements of nfpa 90a and 90b for duct coverings and linings, and ul 181 for mold growth. Approved for use in return air plenums, conforms to astm c 1534 requirements and withstands temperatures of 250 all ap armaflex insulation meets requirements of international. Hvac installations are designed to provide thermal and acoustic comfort and safety to buildings occupants.
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